WO2016136602A1

WO2016136602A1 - Mesh filter

Info

Publication number: WO2016136602A1
Application number: PCT/JP2016/054798
Authority: WO
Inventors: 健二朗瀧
Original assignee: 株式会社エンプラス
Priority date: 2015-02-23
Filing date: 2016-02-19
Publication date: 2016-09-01
Also published as: JP6591760B2; JP2016155045A

Abstract

[Problem] To provide a mesh filter in which a filter section is unlikely to clog. [Solution] A mesh filter 1 is provided with: a filter section 6 for filtering foreign matter 15 from fluid; and a frame body section for supporting the filter section 6. The filter section 6 has a front surface-side portion 6a and a rear surface-side portion 6b and is installed so as to obliquely block the flow of the fluid. The front surface portion 6a of the filter section 6 is disposed on the upstream side, relative to the direction of flow of the fluid, of the rear surface-side portion 6b of the filter section 6 and is constituted by a plurality of longitudinal bars 12 extending in the direction of flow of the fluid. The rear surface-side portion 6b of the filter section 6 is disposed on the downstream side, relative to the direction of flow of the fluid, of the front surface-side portion 6a of the filter section 6, and is constituted by a plurality of transverse bars 13 intersecting the longitudinal bars 12, the portions of the transverse bars 13, which intersect the longitudinal bars 12, being formed integrally with the longitudinal bars 12. The portions of the filter section 6, where the longitudinal bars 12 and the transverse bars 13 do not intersect, are openings 14 through which the fluid can pass.

Description

Mesh filter

The present invention relates to a mesh filter used for filtering out foreign substances in a fluid, and more particularly to a mesh filter having a self-cleaning function.

For example, a mesh filter is disposed in the middle of an oil pipe such as a fuel supply pipe or a lubrication device connected to a fuel injection device of an automobile, and foreign matters in a fluid such as fuel and oil are filtered by the mesh filter. ing.

FIG. 6 is a diagram showing such a conventional mesh filter 100. 6A is a cross-sectional view showing a simplified state of use of the mesh filter 100, FIG. 6B is a plan view of the mesh filter 100, and FIG. 6C is FIG. 6B. FIG. 6D is a cross-sectional view taken along line A5-A5 in FIG. 6C, and FIG. 6E is an A6 view in FIG. 6C. FIG. 6 is a cross-sectional view taken along line -A6, and FIG.

The mesh filter 100 shown in FIG. 6 includes a filter part 101 that filters out foreign substances in the fluid, and a frame body 102 that is integrally formed on the outer periphery of the filter part 101. The mesh filter 100 is formed by injecting molten resin into a cavity of a mold, and a frame body 102 is fixed to a pipe 103 or the like, and the filter unit 101 is arranged so as to be orthogonal to the fluid flow. The The mesh filter 100 has a plurality of vertical bars 104 on the front surface side and a plurality of vertical bars 104 on the back surface side so that the molten resin can be smoothly filled into the cavity during injection molding. And a horizontal crosspiece 105 (see Patent Document 1).

The filter unit 101 of the mesh filter 100 is formed in parallel with the XY plane, the vertical beam 104 extends along the Y axis, and the horizontal beam 105 extends along the X axis so as to be orthogonal to the vertical beam 104. The plurality of vertical bars 104 are arranged in parallel with the Y axis and at equal intervals, and the plurality of horizontal bars 105 are arranged in parallel with the X axis at equal intervals, and are adjacent to the adjacent

vertical bars

104, 104. An opening 106 that allows passage of fluid is formed between 105 and 105.

JP-A-6-238768

However, in the conventional mesh filter 100 shown in FIG. 6, when the vertical beam 104 of the filter unit 101 is arranged on the upstream side of the fluid flow, foreign matter is clogged between the adjacent

vertical beams

104 and 104, When the horizontal rail 105 is arranged on the upstream side of the fluid flow, foreign matter is clogged between the adjacent

horizontal rails

105, 105. The conventional mesh filter 100 shown in FIG. 6 is removed from the pipe 103 or the like when the filter unit 101 is clogged, and the filter unit 101 is washed or the like to eliminate the clogging of the filter unit 101. It has become. Therefore, the fluid flow must be stopped while replacing the clogged mesh filter 100 with a new mesh filter 100. For this reason, there has been a demand from the automobile industry and the like using the mesh filter 100 to provide the mesh filter 100 in which the filter unit 101 is not easily clogged.

Accordingly, an object of the present invention is to provide a mesh filter in which clogging of the filter portion is unlikely to occur.

The present invention relates to a mesh filter 1 including a filter unit 6 that filters out foreign matter 15 in a fluid and a frame body unit 10 that supports the filter unit 6. In the present invention, the filter portion 6 has a front surface side portion 6a and a back surface side portion 6b, and is disposed so as to obliquely block the flow of the fluid. The front surface side portion 6a of the filter portion 6 is disposed upstream of the fluid flow with respect to the back surface side portion 6b of the filter portion 6 and extends along the fluid flow direction. It comprises a plurality of vertical rails 12 extending across the flow. In addition, the back surface side portion 6 b of the filter unit 6 is arranged on the downstream side of the fluid flow with respect to the front surface side portion 6 a of the filter unit 6, and a plurality of horizontal beams 13 intersecting the vertical beam 12. A portion of the horizontal beam 13 that intersects with the vertical beam 12 is formed integrally with the vertical beam 12. A portion of the filter unit 6 where the vertical beam 12 and the horizontal beam 13 do not intersect with each other is an opening 14 that allows the fluid to pass therethrough.

In the mesh filter according to the present invention, the foreign matter filtered off by the filter unit is pushed along the vertical rail of the filter unit by the flow of the fluid, so that the opening of the filter unit is cleaned by the flow of the fluid, No clogging for a long time.

It is a figure which shows the mesh filter which concerns on embodiment of this invention, FIG. 1 (a) is the external appearance perspective view which looked at the mesh filter from diagonally right upper, FIG.1 (b) is the front view (figure which shows a bottom face) of a mesh filter ), FIG. 1C is a side view of the mesh filter, FIG. 1D is a sectional view of the mesh filter cut along the line A1-A1 of FIG. 1C, and FIG. FIG. 1C shows the mesh filter of FIG. 1C as viewed from the direction of arrow C1 (plan view), and FIG. 1F shows the mesh filter of FIG. 1C as viewed from the direction of arrow C2 (back view). FIG. 1G is a side view showing the mesh filter of FIG. 1B viewed from the direction of arrow C3. FIG. 2A is a diagram illustrating an attachment state of the mesh filter, in which FIG. 2A is an attachment state diagram of the mesh filter as viewed from the upstream side to the downstream side of the fluid piping, and FIG. 2B is FIG. FIG. 6 is a cross-sectional view showing a mesh filter attached state cut along the line A2-A2. It is a figure which shows the detail of a filter part, FIG.3 (a) is a figure which expands and shows B1 part (a part of back surface side part) of the filter part of FIG.1 (g), FIG.3 (b) is FIG. FIG. 3A is a cross-sectional view taken along line A3-A3 in FIG. 3A, FIG. 3C is a cross-sectional view taken along line A4-A4 in FIG. 3A, and FIG. It is a figure which expands and shows a part of surface side part of a filter part. It is a figure for demonstrating the self-cleaning function of the mesh filter which concerns on embodiment of this invention. FIG. 5A is an external perspective view of a mesh filter according to Modification 1, FIG. 5B is an external perspective view of a mesh filter according to Modification 2, and FIG. It is an external appearance perspective view of the mesh filter which concerns. 6A and 6B are diagrams showing a conventional mesh filter, in which FIG. 6A is a simplified cross-sectional view showing the state of use of the mesh filter, FIG. 6B is a plan view of the mesh filter, and FIG. FIG. 6 (d) is a sectional view taken along line A5-A5 in FIG. 6 (c), and FIG. 6 (e) is A6-A6 in FIG. 6 (c). Sectional drawing cut | disconnected and shown along a line, FIG.6 (f) is a back view of a mesh filter.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a diagram showing a mesh filter 1 according to an embodiment of the present invention. 1A is an external perspective view of the mesh filter 1 as viewed obliquely from the upper right, and FIG. 1B is a front view of the mesh filter 1 (showing the bottom surface). FIG. 1 is a side view of the mesh filter 1, FIG. 1D is a sectional view of the mesh filter 1 cut along the line A1-A1 of FIG. 1C, and FIG. FIG. 2C is a diagram (plan view) showing the mesh filter 1 of FIG. 1C viewed from the direction of the arrow C1, and FIG. 1F is a diagram showing the mesh filter 1 of FIG. 1 (g) is a side view showing the mesh filter 1 of FIG. 1 (b) as viewed from the direction of arrow C3.

As shown in FIG. 1, the mesh filter 1 is a polyhedron having a substantially triangular prism shape with a hollow interior 2, and fluid is introduced into the interior 2 by a fluid inlet 4 formed on one side surface 3a of the three side surfaces 3a to 3c. A flange-like portion 5 is integrally formed around the fluid inlet 4. In the mesh filter 1, the other two

side surfaces

3b and 3c other than the one side surface 3a where the fluid introduction port 4 is formed among the three side surfaces 3a to 3c are provided with a filter unit 6 for filtering out foreign matters in the fluid, And a frame portion 7 integrally formed around the filter portion 6. Further, in this mesh filter 1, the pair of triangular bottom surfaces 8 a and 8 b are formed of a triangular plate-like member on which the filter portion 6 is not formed, and together with the frame portion 7 integrally formed around the filter portion 6, A frame body portion 10 that supports the filter portion 6 is configured. The mesh filter 1 as a whole is integrally formed of resin (POM (polyacetal), 66 nylon, etc.). In the present embodiment, the filter unit 6 is a quadrangular region provided on the side surfaces 3b and 3c. The frame portion 7 is formed along the outer edge (four sides) of the rectangular filter portion 6. Moreover, the fluid inlet 4 is formed in almost the whole area of the one side surface 3a, and has a rectangular shape similar to the shape of the one side surface 3a.

FIG. 2 is a diagram showing the attachment state of the mesh filter 1. 2A is an attached state diagram of the mesh filter 1 as seen from the upstream side to the downstream side of the fluid piping 11. FIG. 2B is a cross-sectional view showing an attached state of the mesh filter 1 cut along the line A2-A2 of FIG.

As shown in FIG. 2, in the mesh filter 1, the fluid introduction port 4 opens toward the upstream side of the pipe 11, and the flange-like portion 5 connects the connection flange portion 11c of the upstream side pipe 11a and the downstream side pipe 11b. A portion (triangular prism-shaped portion) other than the flange-shaped portion 5 is accommodated in the pipe 11 while being fixed to the flange portion 11 c. The fluid inlet 4 of the mesh filter 1 has a quadrangular shape, and the fluid flow flowing down the upstream side pipe 11 a is introduced into the inside 2 of the mesh filter 1. The fluid that has flowed into the interior 2 of the mesh filter 1 is filtered to remove foreign matters when passing through the pair of

filter portions

6 and 6, and then flows toward the downstream pipe 11b. Thus, the mesh filter 1 attached to the pipe 11 is positioned so that the

filter parts

6 and 6 obliquely block the flow of fluid in the pipe 11.

FIG. 3 is a diagram showing details of the filter unit 6. 3 (a) is an enlarged view of the B1 portion (a part of the back side portion) of the filter portion 6 of FIG. 1 (g), and FIG. 3 (b) is an A3 view of FIG. 3 (a). FIG. 3C is a cross-sectional view taken along line A3, FIG. 3C is a cross-sectional view taken along line A4-A4 in FIG. 3A, and FIG. FIG. 6 is an enlarged view showing a part of the surface side portion of the portion 6.

The filter unit 6 includes a surface side portion 6a that is a portion disposed on the upstream side of the fluid flow, and a back surface side portion 6b that is a portion disposed on the downstream side of the fluid flow with respect to the surface side portion 6a. It is divided in two. The surface side portion 6a of the filter unit 6 is composed of a plurality of vertical bars 12 extending along the direction of fluid flow. The plurality of vertical bars 12 are arranged in parallel to the Y axis and at equal intervals. Further, the back surface side portion 6 b of the filter unit 6 is composed of a plurality of horizontal bars 13 orthogonal to the vertical bars 12 of the front surface side part 6 a of the filter unit 6. The plurality of horizontal rails 13 are arranged in parallel to the X axis at equal intervals, and a portion intersecting with the vertical rail 12 is formed integrally with the vertical rail 12. The portions where the plurality of vertical bars 12 and the plurality of horizontal bars 13 do not intersect with each other are openings 14 that allow fluid to pass therethrough. The opening 14 is a rectangular space formed between a pair of adjacent

vertical bars

12, 12 and a pair of adjacent

horizontal bars

13, 13 that are perpendicular to the

vertical bars

12, 12.

FIG. 4 is a diagram for explaining the self-cleaning function of the mesh filter 1 according to the present embodiment. As shown in FIG. 4, the filter portion 6 of the mesh filter 1 passes through the opening portion 14 because the vertical rail 12 extends along the fluid flow direction and obliquely crosses the fluid flow. The foreign matter 15 filtered out without being moved is pushed by the fluid and moves along the vertical rail 12. As a result, the filter unit 6 is cleaned by the flow of the fluid, and the opening 14 is less likely to be clogged by the foreign matter 15 filtered out.

In the mesh filter 1 described above, for example, the width L1 of the horizontal beam 13 is formed to 0.1 mm, the width L2 of the vertical beam 12 is formed to 0.1 mm, and the length L3 of one side of the opening 14 is 0. .1 mm (see FIG. 3). The dimensions of L1 to L3 are examples for assisting understanding of the mesh filter 1 according to the present embodiment, and are not limited to these numerical values, and are appropriately changed according to use conditions and the like.

As described above, in the mesh filter 1 according to the present embodiment, the foreign matter 15 filtered out by the filter unit 6 is pushed away along the vertical rail 12 of the filter unit 6 by the flow of the fluid. 14 is cleaned by the flow of fluid and does not clog for a long time.

As shown in FIG. 2, the mesh filter 1 according to the present embodiment has a triangular corner portion formed by abutting the tips of a pair of

side surfaces

3b and 3c having the filter portion 6, and this triangular corner portion. Is a foreign substance reservoir 16 for collecting foreign substances pushed away along the vertical beam 12. The foreign substance reservoir 16 is located at the end in the longitudinal direction of the vertical rail 12 and at the downstream end in the fluid flow direction inside the mesh filter 1. Since the mesh filter 1 having such a configuration can store the filtered foreign matter 15 in the foreign matter reservoir 16, the frequency of cleaning operations such as cleaning can be reduced.

In the mesh filter 1 according to the present embodiment, the foreign matter reservoir 16 is connected to an external foreign matter removing device 17 via a drain tube 18 or the like, and the foreign matter 15 accumulated in the foreign matter reservoir 16 is periodically removed by the foreign matter removing device 17. It may be discharged to the outside. The mesh filter 1 configured in this way can further reduce the frequency of cleaning operations such as cleaning.

(Modification 1)
FIG. 5A is an external perspective view showing Modification 1 of the mesh filter. The mesh filter 1 according to the first modification has a conical shape with a hollow inside, a fluid introduction port is formed on the bottom surface 20, and the filter portion 6 is formed on the conical surface 21. The conical surface 21 is formed by integrally forming an annular frame portion 22 along the bottom surface 20, a conical frame portion 24 on the top portion 23 side, and a filter portion 6 supported by these frame portions 22, 24. Yes. The mesh filter 1 having such a shape obtains the same effect as the mesh filter 1 of the above-described embodiment by arranging the filter portion 6 formed on the conical surface 21 so as to obliquely block the flow of fluid. Can do.
The conical mesh filter 1 may be a frustoconical mesh filter having a shape in which the top 23 side is partially cut away.

(Modification 2)
FIG. 5B is an external perspective view showing a second modification of the mesh filter 1. The mesh filter 1 according to Modification 2 has a hollow quadrangular pyramid shape, a fluid introduction port is formed on the bottom surface 25, and the filter unit 6 is formed on all of the four side surfaces 26a to 26d. The side surfaces 26 a to 26 d have an isosceles triangle shape, and are formed so as to surround the isosceles trapezoidal filter portion 6 with the frame portion 27. The mesh filter 1 having such a shape obtains the same effect as the mesh filter 1 of the above embodiment by arranging the filter portion 6 formed on the side surfaces 26a to 26d so as to obliquely block the flow of fluid. be able to.
Note that the mesh filter 1 according to the present modification exemplifies a mode in which the filter unit 6 is formed on all of the four side surfaces 26a to 26d. However, the present invention is not limited to this, and is not limited to this. The filter unit 6 may be formed on the side surface, the two side surfaces, or the three side surfaces.

(Modification 3)
FIG. 5C is an external perspective view showing a third modification of the mesh filter 1. The mesh filter 1 according to the third modification is a triangular prism-shaped polyhedron having a hollow inside, the bottom surface 8 has a right triangle, and one side surface 3a (two

orthogonal side surfaces

3a, 3a, 3a, 3c) A fluid introduction port is formed on one side surface 3a) of 3c, and a filter portion 6 is formed on one side surface 3b that obliquely connects two

side surfaces

3a and 3c orthogonal to each other. One side surface 3b that obliquely connects the two orthogonal side surfaces 3a and 3c has a rectangular shape, and is formed so as to surround the rectangular filter portion 6 with the frame portion 7. The mesh filter 1 having such a shape obtains the same effect as that of the mesh filter 1 of the above embodiment by arranging the filter portion 6 formed on the one side surface 3b so as to obliquely block the flow of fluid. Can do.

(Other variations)
The cylindrical mesh filter 1 according to the present embodiment exemplifies a case where the shape of the opening 14 is square, but is not limited thereto, and the shape of the opening 14 may be rectangular.
Further, the mesh filter 1 according to the present invention is not limited to the polyhedrons exemplified in the above-described embodiment, modification 2 and modification 3, and may be a pentahedron or hexagonal pyramid.

DESCRIPTION OF SYMBOLS 1 ... Mesh filter, 6 ... Filter part, 6a ... Front side part, 6b ... Back side part, 10 ... Frame body part, 12 ... Vertical beam, 13 ... Horizontal beam, 14 ... Opening part , 15 ... Foreign matter

Claims

In a mesh filter comprising a filter part that filters out foreign substances in the fluid, and a frame part that supports the filter part,
The filter portion has a front surface side portion and a back surface side portion, and is disposed so as to obliquely block the flow of the fluid,
The front surface side portion of the filter unit is disposed on the upstream side of the fluid flow with respect to the back surface side portion of the filter unit, extends along the fluid flow direction, and crosses the fluid flow. Consists of a plurality of extending vertical bars,
The back surface side portion of the filter portion is arranged on the downstream side of the fluid flow with respect to the front surface side portion of the filter portion, and is composed of a plurality of horizontal rails intersecting with the vertical rails. A portion intersecting with the vertical beam is formed integrally with the vertical beam,
The portion of the filter portion where the vertical beam and the horizontal beam do not intersect is an opening that allows the fluid to pass through.
A mesh filter characterized by that.
The plurality of vertical bars are arranged in parallel and at equal intervals,
The plurality of horizontal bars are arranged in parallel and at equal intervals, perpendicular to the vertical bars,
The opening is a quadrangular space formed between a pair of adjacent vertical bars and a pair of adjacent horizontal bars orthogonal to the vertical bars, and the plurality of vertical bars and the plurality of horizontal bars A plurality of non-intersecting parts were formed at equal intervals.
The mesh filter according to claim 1.
Provided at the end in the longitudinal direction of the vertical beam and at the downstream end in the fluid flow direction is a foreign substance reservoir for collecting foreign matter flowed along the vertical beam,
The foreign matter reservoir is connected to a foreign matter removing device;
The mesh filter according to claim 1 or 2, wherein
A fluid introduction port that is a polyhedron having a hollow inside, the filter portion is formed on at least one surface of the polyhedron, and the fluid is introduced into the polyhedron on at least one other surface of the polyhedron where the filter portion is not formed Formed,
The mesh filter according to any one of claims 1 to 3, wherein:
The inside is formed in a hollow cone shape or a truncated cone shape, the filter portion is formed in a conical surface, and a fluid introduction port for introducing the fluid into the inside is formed in the bottom surface.
The mesh filter according to any one of claims 1 to 3, wherein: