JP6101236B2 - Foreign matter capture filter - Google Patents

Description

  The present invention relates to a foreign matter trapping filter, and more particularly to a foreign matter trapping filter that is installed in a flow path through which fluid flows to trap foreign matter in the fluid.

  In a pipe where gas or liquid such as gas or water flows as fluid, in order to remove solid components such as dust, sand and rust contained in the fluid as foreign matter, it should be orthogonal to the flow path. A foreign matter trapping filter having a filter member on which a linear or net-like filter medium is stretched is installed.

In order to improve the trapping performance of foreign matter, it is conceivable that the wire constituting the filter medium is tightly stretched and the opening of the filter medium is made smaller. For this purpose, it is necessary to make the wire thinner, and the strength of the filter medium Is reduced, and the filter medium is likely to be deformed when the foreign substance flows in.
As what improved capture performance, without thinning a wire, there exists a thing indicated by patent documents 1, for example. This is a structure in which a plurality of wire mesh filters are bonded to each other with a predetermined angle shift in the circumferential direction, and the metal wire material of another wire mesh filter is positioned in the opening of one wire mesh filter in the flow path direction. Thus, the opening of one wire mesh filter is partitioned by the metal wire of the other wire mesh filter, and a laminate of wire mesh filters having a smaller opening is configured. According to this wire mesh filter laminate, the metal wire of each wire mesh filter is formed with a substantially fine opening without thinning the wire, so the foreign matter capturing performance is improved without reducing the strength of the filter media. Can be made.

JP 2005-138083 A

  However, in the filter laminate in which the plurality of filter members are bonded together, adjacent wire mesh filters are stacked without gaps in the flow path direction and sintered by pressing pressure, so that the flow path length of the opening is elongated. Therefore, there is a problem that the passage resistance of the fluid passing therethrough increases and the pressure loss increases.

  The present invention has been made in view of the above circumstances, and relates to a foreign matter capturing filter for capturing and removing foreign matter contained in the fluid installed in a flow path through which a fluid such as gas or water passes. It is an object of the present invention to provide a foreign matter trapping filter capable of improving the foreign matter catching performance without amplifying the passage resistance and without reducing the strength of the filter medium.

The present invention taken to achieve the above object
A filter laminated body in which a plurality of filter members each having an outer frame installed along the inner periphery of a flow path through which a fluid passes and a plurality of filter members made of a plurality of wires stretched in the outer frame are overlaid. A foreign matter catching filter comprising:
The filter medium is a net-like body in which a large number of square openings are formed by weaving in a lattice pattern from vertical lines made of a large number of wire rods arranged in parallel at equal intervals and horizontal lines orthogonal thereto.
Filter media adjacent the filter member is configured to face each other with a predetermined separating distance, it said separating distance is smaller than the diagonal length of the largest dimension of the opening formed between the filter material wires of one filter member Is set,
The adjacent filter member is a foreign matter trapping filter that is stacked in a state shifted by a predetermined angle in the circumferential direction so that the opening of the filter medium of one filter member is partitioned by the wire of the filter medium of the other filter member.

The above means operates as follows.
In the filter member, a filter medium is formed by stretching a large number of wires in an outer frame having a size and shape that can be installed in a flow path through which a fluid such as gas or water flows. A large number of square openings are formed by weaving vertical lines and horizontal lines orthogonal thereto in a lattice pattern . A plurality of filter members are stacked so that the filter media of the filter members are adjacent to each other with a predetermined separation distance. At this time, one filter member is rotated clockwise in the circumferential direction with respect to other adjacent filter members. Alternatively, the layers are laminated with a predetermined angle shifted counterclockwise. As a result, when the filter laminated body formed by laminating the filter members is viewed from the flow path direction, the filter medium wire of the other filter member crosses the opening of the filter medium of one filter member, The filter medium opening is partitioned by the filter medium wire of the other filter member, and an opening smaller than the filter medium opening of one filter member is formed. Thereby, in a filter laminated body, a foreign material smaller than the foreign material which can be captured with the filter medium of one filter member can be captured.

  Further, by forming a filter laminate by laminating a plurality of filter members, an opening that is substantially smaller than the opening of one filter member is obtained without thinning the wire constituting the filter medium of one filter member. Therefore, it can be used as a filter medium having higher strength than a case where the small opening is formed with a single filter member.

  Further, since the plurality of filter members are laminated so that the filter media of adjacent filter members face each other with a predetermined separation distance, the substantial opening as the filter laminated body is smaller than the opening of one filter member. However, it is possible to prevent amplification of the passage resistance of the fluid when passing through the opening of each filter member.

And since the separation distance between the filter media of adjacent filter members is set smaller than the diagonal length which is the maximum dimension of the opening of the filter media of one filter member, the foreign matter is the filter media of the first filter member. Even if it passes through, the foreign matter is prevented from flowing between the filter media and passing through the filter media of the second filter member, and the foreign matter can be reliably captured.

  In the foreign matter trapping filter, preferably, the outer frame of each filter member has positioning means for laminating adjacent filter members in a state shifted by a predetermined angle in the circumferential direction. In this case, if the filter members are stacked in accordance with the positioning means, the other filter members can be shifted in the circumferential direction by an appropriate angle with respect to one filter member and the state can be maintained.

  In the foreign matter capturing filter, preferably, the positioning means is provided on a convex portion provided on one surface of an upstream surface and a downstream surface of the outer frame in the flow path direction, and on the other surface; It is comprised from the recessed part which the said convex part can fit. For example, a convex portion is provided on the upstream surface of the outer frame, and the concave portion is formed on the downstream surface at a position shifted by a predetermined angle in the circumferential direction from the formation position of the convex portion. By doing so, if the convex portions of the other filter members are fitted into the concave portions of one filter member, the two filter members can be stacked in a state of being shifted by the predetermined angle.

  As described above, according to the present invention, by laminating a plurality of filter members with a predetermined angle shifted in the circumferential direction so that the wires constituting each filter medium do not overlap in the flow path direction, The filter laminated body as a foreign material capture filter is comprised. According to this, it is possible to obtain a foreign matter capturing effect substantially equivalent to that of one filter member provided with a filter medium having a small opening. In this case, since it is not necessary to thin the wire constituting the filter medium of one filter member in order to reduce the opening, the strength of the filter medium itself is not impaired. Therefore, it is possible to prevent deformation and breakage due to trapping of foreign matter.

  Further, since the filter media of adjacent filter members of the filter laminate are set to face each other with a predetermined separation distance, the fluid sequentially passes through the openings of the filter media of each filter member. It will be. Accordingly, the amplification of the passage resistance of the fluid is small, and the pressure loss can be prevented from increasing.

Further, the separation distance between the filter media of adjacent filter members is set to be smaller than the maximum dimension of the filter media opening of one filter member, and when viewed from the flow path direction, Since the filter medium wire of the second filter member is located, the foreign matter that has passed through the filter medium opening of the first filter member moves between the filter mediums and opens the filter medium opening of the second filter member. It is prevented from passing through and foreign objects can be reliably captured.
In addition, since a filter laminated body is only installed in predetermined places, such as a gas piping and a water pipe, it is easy to attach or detach, and a filter member can be isolate | separated and each cleaning or replacement | exchange is possible.

  In addition, if the positioning means for laminating the filter medium of the adjacent filter member is shifted by a predetermined angle in the circumferential direction on the outer frame for stretching the filter medium, the filter member is simply laminated according to the positioning means, A filter laminate having an improved foreign matter capturing effect can be easily configured.

  Moreover, if the recessed part and convex part which can mutually be fitted are formed in the front and back of an outer frame as a positioning means, respectively, it becomes possible to comprise a filter laminated body still more easily.

It is explanatory drawing which shows the state which mounted | wore piping with the foreign material capture filter of embodiment of this invention . It is a disassembled front view of the foreign material capture filter which concerns on embodiment of this invention . It is XX schematic sectional drawing of FIG. 2 in the state which accumulated the foreign material capture | acquisition filter which concerns on embodiment of this invention . It is a disassembled front view of the foreign material capture filter as a reference example .

Hereinafter, embodiments for carrying out the present invention will be described with reference to the accompanying drawings.
1, the extraneous matter catching filter implementation of the present invention is shown mounted in the pipe (3), FIG. 2, first, second filter member (1a) (1b) each of front view It is.

  The foreign matter capturing filter according to the present invention is applied to a filter for a water channel installed in a water channel through which water flows. A filter medium (12) made up of a number of wire members is stretched in an annular outer frame (11). The second filter member (1a) (1b) is constituted, and a filter laminate (1) is formed by superposing two of them.

  As shown in FIGS. 1 and 2, the first and second filter members (1a) and (1b) are each a vertical line (12a) made of a large number of metal wires arranged in parallel at equal intervals, and Around the mesh-shaped filter medium (12) knitted in a lattice pattern from the orthogonal horizontal line (12b), an outer diameter made of resin having an outer diameter large enough to fit tightly into the step (30) of the pipe (3) The frame (11) is formed by integral molding, and two of these are stacked to form a filter laminate (1).

  This filter laminate (1) has a filter medium (12) perpendicular to the flow path at the step (30) provided in the vicinity of the inlet end (31) of the pipe (3) constituting the water channel. Installed freely so that it is located in

  As shown by the arrows in FIG. 1, the water is set to flow upward from the drawing through the two filter media (12) of the filter laminate (1) from the inlet end (31). The filter laminate (1) is pushed by the water flow so as to be caught by the stepped portion (30) and fixed to the downstream side so as not to be detached.

The filter medium (12) has a large number of square openings (13) surrounded by vertical lines (12a) and horizontal lines (12b) to capture foreign matter larger than the maximum dimension of the openings (13). Is possible.
In addition, as the mesh body constituting the filter medium (12), for example, the diameters of the vertical line (12a) and the horizontal line (12b) are both 0.16 mm, and the side length of the opening (13) is 0.26 mm. In this case, the ratio of the openings per unit area (space ratio) is 38.7%.

A convex portion (21) protrudes at a predetermined position on the upper surface of the outer frame (11), and a concave portion (22) having a size and shape into which the convex portion (21) can be fitted is formed at a predetermined position on the lower surface. Has been. Note that the distance from the center of the outer frame (11) to the convex portion (21) and the distance to the concave portion (22) are set equal.
Further, in this embodiment in which the square opening (13) is formed, the convex portion (21) and the concave portion (22) are laminated by shifting the filter members (1a) and (1b) in the circumferential direction. The filter media (12) and (12) are formed at positions apart from each other by a predetermined angle excluding 90 ° and 180 °. In FIG. 2, the convex portion (21) and the concave portion (22) It is positioned 135 degrees clockwise and away in the circumferential direction.

  As shown in FIG. 3, the second filter member (1b) is positioned below one of the first filter members (1a), and the second filter member (1b) is placed in the recess (22) of the first filter member (1a). ) Is inserted. Since the convex portion (21) and the concave portion (22) are located 135 degrees apart in the circumferential direction as described above, the second filter member (1b) is attached to the first filter member (1a). If it rotates coaxially and 135 degrees in the circumferential direction, the convex part (21) of the second filter member (1b) can be fitted into the concave part (22) of the first filter member (1a).

Thereby, the vertical line (12) constituting the filter medium (12) of the second filter member (1b) with respect to the direction of the vertical line (12a) and the horizontal line (12b) constituting the filter medium (12) of the first filter member (1a) ( 12a) and the horizontal line (12b) are deviated from each other by 45 degrees, and within the opening (13) of the filter medium (12) of the first filter member (1a) as shown in the central laminated portion (10) of FIG. In addition, the vertical line (12a) or the horizontal line (12b) constituting the filter medium (12) of the second filter member (1b) crosses.
That is, when viewed from the flow path direction, the vertical line (12a) in which the opening (13) of the filter medium (12) of the first filter member (1a) constitutes the filter medium (12) of the second filter member (1b). Alternatively, the size of the opening (13) of the laminated portion (10) is defined by the horizontal line (12b). The size of the opening (13) of each of the first and second filter members (1a) and (1b) (13) ) About half the size.
Specifically, when the mesh size of the filter medium (12) of the first and second filter members (1a) and (1b) is 60 mesh, the laminated portion (10) is substantially the same as 120 mesh. It has a capture performance.

For example, when one filter medium (12) is composed of 120 mesh with the same type of filter member, the diameter of the vertical line (12a) and the horizontal line (12b) is 0.08 mm, which is 60 mesh diameter It is necessary to use a wire with half the thickness. Therefore, the 120-mesh filter medium (12) is weaker than the 60-mesh filter medium (12) and is easily deformed.
However, in this embodiment, since the structure is such that two 60-mesh filter media (12) are coaxially laminated at a predetermined angle in the circumferential direction, the opening (13) is substantially 120 mesh. The diameter of the vertical line (12a) and the horizontal line (12b) constituting the filter medium (12) can be larger than those of 120 mesh, and the strength of each filter medium (12) Can be prevented. That is, it is possible to obtain a 120-mesh capture performance while maintaining the strength of the 60-mesh filter medium (12).

In addition, the distance (t) (see FIG. 3) between the filter medium (12) of the first filter member (1a) and the filter medium (12) of the second filter member (1b) in the filter laminate (1) is an opening ( The dimensions of each part are set to be smaller than the diagonal length (s) (see FIG. 2) which is the maximum dimension of 13).
In FIG. 3, the vertical lines (12a) and the horizontal lines (12b) of the filter members (1a) and (1b) are shown in a simplified manner for explanation.
Thus, even if foreign matter passes through the opening (13) of the second filter member (1b) located on the upstream side, the opening (13) of the first filter member (1a) and the opening of the second filter member (1b) It is possible to prevent the foreign matter from moving between (13) and passing through the opening (13) of the first filter member (1a) on the downstream side, and the vertical line (12a) of the first filter member (1a). Alternatively, foreign objects can be reliably captured by the horizontal line (12b).

  Further, the water passes through the openings (13) and (13) of the filter media (12) and (12) of the two first and second filter members (1a) and (1b) stacked through a predetermined separation distance, respectively. Since they pass through in sequence, the passage resistance when passing through each filter member (1a) (1b) is substantially the same as that when passing through one 60-mesh filter member. As a result, amplification of the passage resistance of water passing through the entire filter laminate (1) can be suppressed, and an increase in pressure loss can be prevented.

As described above, in the filter laminate (1) of the first embodiment, the same trapping performance as that of 120 mesh can be obtained while maintaining the strength and the passage resistance of 60 mesh. And securing the strength of the filter medium (12) and further suppressing the amplification of the passage resistance can be realized at the same time.
In addition, since the filter laminate (1) can be formed simply by fitting the convex portions (21) and the concave portions (22) of the first and second filter members (1a) and (1b), the structure is simple, Mounting to the pipe (3) is easy.

  Then, foreign substances such as dust, sand and rust trapped in the filter media (12) and (12) of the first and second filter members (1a) and (1b) accumulate, and the first and second filter members (1a) and (1b) ) Must be cleaned or replaced, the filter laminate (1) is taken out from the inlet end (31) of the pipe (3) and the first filter member (1a) into the recess (22) When the first and second filter members (1a) and (1b) are separated by releasing the fitting of the convex portions (21) of the two filter members (1b), the first and second filter members (1a) and (1b) are separated. Each can be cleaned or replaced.

4 is an exploded front view of a foreign matter trapping filter as a reference example . In the same annular outer frame (11) as that employed in the above-described embodiment of the present invention , a filter medium (14) The third and fourth filter members (2a) and (2b) are configured by stretching only the vertical line (12a).
In this structure, the space between the vertical lines (12a) functions as an opening (23), and the convex portion (21) formed on the upper surface of the outer frame (11) and the concave portion (22) formed on the lower surface It is assumed that they are formed at intervals of 90 degrees in the direction.

In order to fit the convex portion (21) on the upper surface of the fourth filter member (2b) into the concave portion (22) on the lower surface of the third filter member (2a), the fourth filter member (2a) has a fourth portion. The filter member (2b) is coaxially rotated 90 degrees in the circumferential direction. Thus, when viewed from the flow path direction, the vertical line (12a) of the third filter member (2a) and the vertical line (12a) of the fourth filter member (2b) are perpendicular to each other, and the filter medium (14) is laminated. A lattice-like mesh is formed in the portion (20).
The distance between the filter media (14) and (14) when the third and fourth filter members (2a) and (2b) are laminated is determined by the distance between the vertical lines (12a) of the filter members (2a) and (2b). Is set to be smaller.

  In this case, the foreign matter that has passed through the vertical line (12a) of the third filter member (2a) is captured by the vertical line (12a) of the fourth filter member (2b), so that a reliable foreign matter removal effect is obtained. At the same time, the openings (23) and (23) of the linear third filter members (2a) and (2b) have smaller water passage resistance than the lattice-shaped one, and can ensure a smooth water flow. .

  Further, if the convex portion (21) and the concave portion (22) are provided at positions shifted by 45 degrees in the circumferential direction, the fifth filter member having the same structure as the third and fourth filter members (2a) (2b) (Not shown) can be laminated in a state of being shifted by 45 degrees with respect to the laminated body of the third and fourth filter members (2a) and (2b). Thus, by setting it as the three-layer structure of the 3rd-5th filter member, the mesh size of a lamination | stacking part (20) becomes smaller, and can catch a foreign material more reliably.

  In each of the above-described embodiments, the filter member having the filter medium having the same mesh size is employed. However, a configuration in which layers having different mesh sizes are stacked may be employed. In this case, if the mesh size of the filter medium of the upstream filter member is set larger than the mesh size of the filter medium of the downstream filter member, a relatively large foreign matter is captured by the upstream filter medium, and the downstream filter medium Finer foreign matters will be captured, and the lifetime of filter clogging can be extended. In this case, it is desirable to set the distance between the filter media to be smaller than the maximum dimension of the opening having the smaller mesh size.

  In addition, when using three or more filter members, so long as they are arranged so that the filter medium wires of the adjacent filter members do not overlap in the flow path direction, they overlap with the filter medium other than the filter media of the adjacent filter members. Each filter member may be arranged.

(1) ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Filter laminate
(1a) (1b) ・ ・ ・ ・ ・ ・ ・ ・ Filter member
(11) ・ ・ ・ ・ ・ Outer frame
(12) ... Filter medium
(12a) ・ ・ ・ ・ ・ ・ ・ ・ ・ Vertical line (wire)
(12b) ・ ・ ・ ・ ・ ・ ・ ・ ・ Horizontal line (wire)
(13) ・ ・ ・ ・ ・ Opening

Claims (3)

A filter laminated body in which a plurality of filter members each having an outer frame installed along the inner periphery of a flow path through which a fluid passes and a plurality of filter members made of a plurality of wires stretched in the outer frame are overlaid. A foreign matter catching filter comprising:
The filter medium is a net-like body in which a large number of square openings are formed by weaving in a lattice pattern from vertical lines made of a large number of wire rods arranged in parallel at equal intervals and horizontal lines orthogonal thereto.
Filter media adjacent the filter member is configured to face each other with a predetermined separating distance, it said separating distance is smaller than the diagonal length of the largest dimension of the opening formed between the filter material wires of one filter member Is set,
The adjacent filter member is a foreign matter trapping filter that is laminated in a state shifted by a predetermined angle in the circumferential direction so that the opening of the filter medium of one filter member is partitioned by the wire of the filter medium of the other filter member.   2. The foreign matter trapping filter according to claim 1, wherein the outer frame of each filter member has positioning means for stacking adjacent filter members in a state shifted by a predetermined angle in the circumferential direction.   3. The foreign matter capturing filter according to claim 2, wherein the positioning means is provided on a convex portion provided on one surface of an upstream surface and a downstream surface of the outer frame in the flow path direction, and on the other surface. And a foreign matter catching filter comprising a concave portion into which the convex portion can be fitted.

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