JP2000102707A - Wire-net laminated filter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve filtration efficiency in a laminated filter formed by laminating many wire nets. SOLUTION: The size of the opening of the wire nets K1, K2, K3, K4 and K5 is successively decreased from a fluid inlet toward the outlet, and the wire nets K1, K2, K3, K4 and K5 are arranged properly. Filtration spaces having a funnel-shaped section are innumerably and regularly arranged within a group K of the wire nets. Consequently, grains are uniformly dispersed in the group K, and the filtration efficiency is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laminated filter using a wire mesh as a filter medium.

[0002]

2. Description of the Related Art In a laminated filter made of a wire mesh, it has been widely practiced to overlap wire meshes having different meshes. A fine wire mesh is placed. In that case,
Conventionally, as described in Japanese Patent Publication No. 8-44696, for example, several sets of wire meshes are made into one set and a plurality of sets of wire meshes are overlapped, and the coarseness of each set is made different. Thus, for example, in many cases, a wire mesh group is composed of several layers such as a coarse layer, a medium layer, and a fine layer.

In order to eliminate the directionality of the filter, a filter layer made of the finest wire mesh (or metal non-woven fabric) is formed at the center in the thickness direction, and the wire mesh is formed on both sides thereof. It is also practiced to form a filtration layer consisting of: Further, in the conventional filter, no attention is paid to the overlapping of the meshes of the wire meshes, and the meshes of the respective wire meshes are random because the wire meshes are simply overlapped.

[0004]

The main purpose of making the mesh of the wire mesh different in the laminated wire mesh filter is to improve the filtration efficiency by three-dimensional filtration. In other words, by using three-dimensionally the inside of the wire mesh group, such that large particles are captured by a coarse wire mesh on the inlet side, and small particles are captured by a fine wire mesh placed on the core or the discharge side. They are trying to improve filtration efficiency.

However, in the filter having the conventional structure, a large number of wire mesh groups are simply divided into several layers such as a coarse layer, a medium layer, and a fine layer. Many of them tend to be captured, and thus it was difficult to say that the entire filter was effectively used. In addition, since the wire mesh is simply overlapped without considering the orientation of the mesh, the coarseness of the mesh is not constant in each layer. In some cases, the three-dimensional filtration was insufficient.

Further, in order to improve the filtration efficiency of a filter, in addition to dispersing the particles in the thickness direction (steric filtration), it is also necessary to uniformly disperse the particles in the plane direction of the filter (dispersion filtration). Although it is necessary, in a conventional structure in which wire meshes are simply overlapped, the wire material of two overlapping wire meshes intersects at random, so that the roughness when viewed along a plane direction varies. Has become
For this reason, the function of uniformly dispersing the particles in the plane direction was not perfect.

As described above, since the dispersion of the particles is not always perfect, the filtration efficiency has not been sufficient yet. The present invention aims to improve these situations.

[0008]

According to the present invention, there is provided a filter for holding a plurality of filtration wire nets having different meshes in a superposed state, wherein the plurality of wire meshes have the same mesh. The feature is that they are arranged so as to become smaller in order and overlapped. Further, according to the present invention, as described in claim 2, by laminating the plurality of filtration wire meshes with their meshes aligned, an innumerable funnel-shaped filtration space is regularly formed inside the filtration wire mesh group. Also includes the formed structure.

Means for holding the wire mesh group undetachably include any means such as fixing the periphery by a rim made of a metal plate, or integrating them by welding or sintering. The filter is attached to the filtration device in a state where the coarsest wire mesh is located on the fluid inlet side and the finest wire mesh is located on the fluid outlet side.

[0010]

According to the present invention, since the mesh of the wire mesh is gradually reduced from the inlet side to the outlet side of the fluid, the particles are spread over the entire wire mesh group in the thickness direction according to the size. The function of dispersing is improved. In addition, by improving the function of dispersing particles in the thickness direction of the wire mesh group according to the size, fine particles can be suppressed from being trapped by the wire mesh closer to the entrance side, so that the particles are dispersed in the plane direction. The ability to do so can also be improved.

As described above, since the function of dispersing particles in the thickness direction and the plane direction can be improved, the inside of the wire mesh group can be used more effectively, and as a result, the filtration efficiency can be reduced as compared with the conventional one. Can be improved. In particular, when countless funnel-shaped filtration spaces are formed in a regularly aligned state inside the wire mesh group as in claim 2, the function of dispersing particles in the thickness direction of the wire mesh group according to the size thereof is ensured. In addition, since the filtration space is formed in a uniform state over the entire area, the function of dispersing the particles in the plane direction is also ensured. As a result, the entire inside of the wire mesh group can be used effectively, and The filtration efficiency can be remarkably improved as compared with.

[0012]

Next, an embodiment of the present invention will be described. FIG. 1 is a perspective view of a filter F, and FIG.
2 is a sectional view taken along the line II-II of FIG. 1. As shown in these figures, the filter F is composed of a number of superimposed wire meshes K1, K2,
K3... And a metal rim R in which these wire meshes K1, K2, K3,.

The fluid flows from top to bottom as indicated by the arrows in FIG. The wire meshes are indicated as a first wire mesh K1, a second wire mesh K2,... A sixth wire mesh K6 in order from the fluid inlet side to the fluid outlet side. The first to fifth wire meshes K1 to K5 are filtering wire meshes, and the sixth wire mesh K6 is a supporting wire mesh. Note that a plurality of supporting wire nets may be provided (in this case, the roughness may be the same or different).

FIG. 3 is an exploded perspective view of the wire mesh group K, FIG. 4 is a partial plan view of the wire mesh group K, and FIG. 5 is a sectional view taken along the line VV of FIG.
As shown in these figures, the coarseness of the mesh from the first wire mesh K1 to the fifth wire mesh K5 (in other words, the pitches of the meshes P1, P2,...)
Are sequentially reduced (from the fifth wire netting K5, the coarseness is sequentially increased). The wire mesh used is preferably a plain weave, but a wire mesh having another weave structure such as a twill weave can also be used.

As a specific example of the coarseness, for example, the first wire mesh K1 is 20 mesh, the second wire mesh K2 is 40 mesh, and the third wire mesh is
K3 80 mesh, 4th wire mesh K4 160 mesh, 5th wire mesh
K5 is 320 mesh (or 325 mesh). And FIG.
As shown in FIG. 5, each of the wire meshes is arranged such that the wire wire of the first wire mesh K1 and the wire wire of the other second to fifth wire meshes K2, K3, K4, K5 overlap the wire wire and the weft wire material of the first wire mesh K1. K1, K2, K3 ... overlap each other with the mesh aligned. The circled numbers in FIG. 4 indicate wire mesh numbers.

As can be easily understood from FIG. 5, a wire mesh group K (filtration layer) composed of five wire meshes K1, K2, K3... Innumerable filtration spaces are formed. The sixth wire mesh K6 is for maintaining the strength, and a wire mesh having an appropriate coarseness may be used (the same mesh as the fourth wire mesh K4, 160 mesh is used in the figure).

As described above, the first to fifth wire meshes K1, K2, K3.
Since the innumerable funnel-shaped filtration spaces are formed inside the filtration layer made of particles, the particles can be accurately dispersed in the thickness direction of the wire mesh group K according to the size. Further, since the funnel-shaped filtration space is uniformly spread in the plane direction, the particles are evenly dispersed in the plane direction. In addition, since the particles can be accurately dispersed in both the thickness direction and the planar direction, the entire filtration layer can be effectively used for filtration, and as a result, the filtration efficiency is significantly improved. Can be.

When actually commercializing the product, it is difficult to manufacture it in a precise state as shown in the drawing due to a manufacturing error of the wire mesh and a manufacturing error of the superimposition. What is necessary is just a structure formed innumerably. {Others} It goes without saying that the number of wire meshes for filtration is not limited to five as in the above example, but can be set as needed. Further, it is not always necessary to reduce the eye roughness by half.

If there is a problem in strength, a supporting wire mesh may be interposed inside the filtration layer. Also, the wire mesh becomes finer as the mesh becomes finer (the mesh count becomes larger), so if you want the filter layer to have a certain thickness, you need to use a plurality of wire meshes with the same coarseness. They may be superimposed one by one. That is, for example, in the example shown in the figure, two second wire meshes K2
The third wire K3 may be stacked, the fourth wire mesh K4 may be stacked four times, and the fifth wire mesh K5 may be stacked five times, and such a form is also included in the claims.

Further, another filter medium such as a nonwoven fabric or a sintered metal filter medium may be laminated on the wire mesh filter layer. Further, the means for fixing a large number of wire meshes in a stacked state is not limited to the use of a rim made of metal or the like as shown in the figure, and the wire meshes are fixed to each other by welding or sintering, or Alternatively, only the peripheral portion may be bonded with an adhesive.

Further, when it is desired to eliminate the directionality of the filter, the filter may be symmetrical with respect to the center in the thickness direction. In other words, in the example shown in FIG.
K5 is arranged, and 4th wire mesh K4 and 3rd wire mesh
In this case, about half of the entire wire mesh group will function as a wire mesh for filtration.)

The plane shape of the filter is not limited to a disk shape.
For example, a square shape or a donut shape can be appropriately set as needed.

[Brief description of the drawings]

FIG. 1 is a perspective view of a filter.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is an exploded perspective view of a wire mesh group.

FIG. 4 is a partial plan view of a wire mesh group.

FIG. 5 is a sectional view taken along line VV of FIG. 4;

[Explanation of symbols]

 F Filter K Wire mesh group K1 1st wire mesh K2 2nd wire mesh K3 3rd wire mesh K4 4th wire mesh K5 5th wire mesh K6 6th wire mesh R Rim

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[Procedure amendment]

[Submission date] August 16, 1999 (1999.8.1
6)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Full text

[Correction method] Change

[Correction contents]

[Document Name] Statement

[Title of the Invention] Laminated filter made of wire mesh

[Claims]

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laminated filter using a wire mesh as a filter medium.

[0002]

2. Description of the Related Art In a laminated filter made of a wire mesh, it has been widely practiced to overlap wire meshes having different meshes. A fine wire mesh is placed. In that case,
Conventionally, as described in Japanese Patent Publication No. 8-44696, for example, several sets of wire meshes are made into one set and a plurality of sets of wire meshes are overlapped, and the coarseness of each set is made different. Thus, for example, in many cases, a wire mesh group is composed of several layers such as a coarse layer, a medium layer, and a fine layer.

In order to eliminate the directionality of the filter, a filter layer made of the finest wire mesh (or metal non-woven fabric) is formed at the center in the thickness direction, and the wire mesh is formed on both sides thereof. It has been made as benzalkonium to form a filtration layer composed. In addition, the conventional filter, attention to the overlap of the mesh of wire mesh with each other has not been paid, not simply Na only have piled up wire mesh.

[0004]

The main purpose of making the mesh of the wire mesh different in the laminated wire mesh filter is to improve the filtration efficiency by three-dimensional filtration. In other words, by using three-dimensionally the inside of the wire mesh group, such that large particles are captured by a coarse wire mesh on the inlet side, and small particles are captured by a fine wire mesh placed on the core or the discharge side. They are trying to improve filtration efficiency.

However, in the filter having the conventional structure, a large number of wire mesh groups are simply divided into several layers such as a coarse layer, a medium layer, and a fine layer. Many of them tend to be captured, and thus it was difficult to say that the entire filter was effectively used. Further, since the wire mesh merely simply superposed without considering the orientation of the mesh, not constant eye roughness even in each layer, and therefore, a fine eye portion to medium-th layer e.g. In some cases, the filtration was insufficient, and the three-dimensional filtration was insufficient in this aspect.

Further, in order to improve the filtration efficiency of a filter, in addition to dispersing the particles in the thickness direction (steric filtration), it is also necessary to uniformly disperse the particles in the plane direction of the filter (dispersion filtration). Although it is necessary, in a conventional structure in which wire meshes are simply overlapped, the wire material of two overlapping wire meshes intersects at random, so that the roughness when viewed along a plane direction varies. Has become
For this reason, the function of uniformly dispersing the particles in the plane direction was not perfect.

As described above, since the dispersion of the particles is not always perfect, the filtration efficiency has not been sufficient yet. The present invention aims to improve these situations.

[0008]

SUMMARY OF THE INVENTION The present invention relates to a method for filtering a plurality of sheets of paper.
With wire meshes in which wire meshes are inseparably stacked
Filter, one side of the wire mesh group
For each filtration from
So that the coarseness of the wire mesh decreases in order of 1 / integer
And for each filtration with each other's mesh aligned
By stacking wire meshes, countless
The feature is that the funnel-shaped filtration space is formed regularly.
Having.

[0009] As means for inseparably hold the filtration wire mesh, fixed or sandwiched a peripheral rim made of a metal plate, can or integrally by welding or sintering, the unit is not limited. The filter is attached to the filtration device in a state where the coarsest wire mesh is located on the fluid inlet side and the finest wire mesh is located on the fluid outlet side.

[0010]

[Operation / Effect] According to the present invention , no wire mesh
A number of funnel-shaped filtration spaces are regularly formed
Particles are dispersed in the thickness direction of the wire mesh according to their size.
The function to make it sure. Moreover, each wire mesh has a mesh
Filter space over the entire area
The particles are formed in a uniform state over the
The function of distributing the data to the server is also ensured.

[0011] More specifically, the roughness of each filtration wire mesh is
In the direction of fluid flow
The funnel-shaped filtration space faces the finest wire mesh.
In a regularly branched state. others
Particles in the thickness direction of the wire mesh for filtration
As it comes out, the particles are collected at each layer of the filtration mesh.
It can be accurately dispersed in the plane direction.
As a result, the entire inside of the wire mesh
The filtration efficiency can be remarkably improved as compared with.

[0012]

Next, an embodiment of the present invention will be described with reference to the drawings.
A description will be given below. FIG. 1 is a perspective view of the filter F, and FIG. 2 is a sectional view taken along the line II-II of FIG. 1. As shown in these figures, the filter F has a large number of superimposed wire meshes K1, K2,
K3... And a metal rim R in which these wire meshes K1, K2, K3,.

The fluid flows from top to bottom as indicated by the arrows in FIG. The wire meshes are indicated as a first wire mesh K1, a second wire mesh K2,... A sixth wire mesh K6 in order from the fluid inlet side to the fluid outlet side. The first to fifth wire meshes K1 to K5 are filtering wire meshes, and the sixth wire mesh K6 is a supporting wire mesh. Note that a plurality of supporting wire meshes may be provided (in this case, the roughness may be the same or different).

FIG. 3 is an exploded perspective view of the wire mesh group K, FIG. 4 is a partial plan view of the wire mesh group K, and FIG. 5 is a sectional view taken along the line VV of FIG.
As shown in the figure this is found, the pitch P1 of the squares the mesh size (in other words towards the first wire mesh K1 Fifth wire mesh K5, P2, · ·
・) Are sequentially reduced (from the fifth wire mesh K5, the coarseness is sequentially increased). The wire mesh used is preferably a plain weave, but a wire mesh having another weave structure such as a twill weave can also be used.

Each of the wire meshes K1, K2,...
20 mesh, 2nd wire mesh K2 40 mesh, 3rd wire mesh K3
80 mesh, 4th wire mesh K4 160 mesh, 5th wire mesh K5
320 and so the mesh (or 325 mesh), the
From the first wire mesh K1 to the fifth wire mesh K5, the coarseness in order is half.
Every minute (half) is finely detailed . And
As shown in FIGS. 4 and 5, the second to fifth wire meshes K2, K3, K4, K5 and the wire wire of the other second to fifth wire meshes overlap with the wire wire and the weft wire of the first wire mesh K1. Each of the wire meshes K1, K2, K3,... The circled numbers in FIG. 4 indicate wire mesh numbers.

As can be easily understood from FIG. 5, a wire mesh group K (filtration layer) composed of five wire meshes K1, K2, K3... Innumerable filtration spaces are formed. The sixth wire mesh K6 is for maintaining the strength, and a wire mesh having an appropriate coarseness may be used (the same mesh as the fourth wire mesh K4, 160 mesh is used in the figure).

In one mesh of the first wire mesh K1, there is a second wire mesh K2.
There are four meshes, and within one mesh of the second wire mesh K2
There are four meshes of the third wire mesh K3, and one mesh of the third wire mesh K3
Four meshes of the fourth wire mesh K4 exist in the mesh, and the fourth wire mesh K4
Within one mesh of K4, there are four meshes of the fifth wire mesh K5.
ing. For this reason, the funnel-shaped filtration space is connected to the fifth wire mesh K5.
It is in a state of branching regularly.

Since a number of funnel-shaped filtration spaces, which are regularly branched, are formed inside the filtration layer composed of the first to fifth wire meshes K1, K2, K3,.
And it can be appropriately dispersed in the thickness direction of the wire mesh group K according to the size. Further, since the countless funneled filtration space is spread regularly while branched, particles, at the location of each wire mesh and allowed to evenly disperse in the flat surface direction.

As described above, the particles are distributed in the thickness direction of the wire mesh group K.
It can be accurately dispersed, and each wire mesh layer
Particles can be accurately dispersed in the plane direction.
Because, can be filtered by effectively utilizing the entire filter layer, as a result, it is possible to significantly improve the filtration efficiency.

When actually commercializing a product, it is difficult to manufacture it in a precise state as shown in the drawing due to a manufacturing error of a wire mesh and a manufacturing error of superimposition. What is necessary is just a structure formed innumerably.

{ Others } It goes without saying that the number of wire meshes for filtration is not limited to five as in the above example, and can be appropriately set as needed. Further, it is not always necessary to reduce the eye roughness by half. When there is a problem in strength, a supporting wire mesh may be interposed inside the filtration layer.

Further , the wire mesh becomes finer as the mesh becomes finer (the mesh count becomes larger). Therefore, when it is desired that the filtration layer has a certain thickness, the wire mesh having the same mesh is used. May be superposed on a plurality of sheets at a time. That is, for example, in the example shown in FIG.
It is also possible to make two layers of K2, three layers of third wire netting K3, four layers of fourth wire netting K4, and five layers of fifth wire netting K5. The form is also included in the configuration of the claims.

Further, another filter medium such as a nonwoven fabric or a sintered metal filter medium may be laminated on the wire mesh filter layer. Further, the means for fixing a large number of wire meshes in a stacked state is not limited to the use of a rim made of metal or the like as shown in the figure, and the wire meshes are fixed to each other by welding or sintering, or Alternatively, only the peripheral portion may be bonded with an adhesive.

Furthermore, when it is desired to eliminate directionality in the filter may be the structure of the front and back symmetrically to the boundary center of the thickness direction. In other words, in the example shown in FIG.
K5 is arranged, and 4th wire mesh K4 and 3rd wire mesh
In this case, about half of the entire wire mesh group will function as a wire mesh for filtration.)

[0025] The planar shape of the filter is not limited to the disc-shaped,
For example, a square shape or a donut shape can be appropriately set as needed.

[Brief description of the drawings]

FIG. 1 is a perspective view of a filter.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is an exploded perspective view of a wire mesh group.

FIG. 4 is a partial plan view of a wire mesh group.

FIG. 5 is a sectional view taken along line VV of FIG. 4;

[Description of Signs] F Filter K Wire Mesh Group K1 First Wire Mesh K2 Second Wire Mesh K3 Third Wire Mesh K4 Fourth Wire Mesh K5 Fifth Wire Mesh K6 Sixth Wire Mesh R Rim

[Procedure amendment 2]

[Document name to be amended] Drawing

[Correction target item name] Fig. 4

[Correction method] Change

[Correction contents]

FIG. 4

Claims (2)

[Claims] (1) A plurality of filtration wire meshes having different meshes,
Arrange them in order so that the coarseness of the eyes becomes smaller in order,
A wire mesh laminated filter characterized in that the wire mesh group is held undetachably. 2. The filter mesh according to claim 1, wherein a plurality of filtration meshes are overlapped with their meshes aligned to form an infinite number of funnel-shaped filtration spaces inside the group of filtration meshes. The wire mesh laminated filter according to claim 1.