JP2011224450A - Filtration apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a filtration apparatus that prevents gel-like unwanted substances from passing a filter.SOLUTION: The apparatus includes: a filter 11 which prevents unwanted substances 12 from passing the filter and is positioned at a first flow path 9 through which a fluid 8 passes; an upstream surface 11b which is positioned at the upstream side of the filter 11 and is configured to be oblique to the travelling direction of the fluid 8; and a retaining section 5a which is positioned at the downstream side of the upstream surface 11b and retains the unwanted substances 12. The retaining section 5a is configured to be recessed in the direction intersectional to the direction to which the fluid 8 travels through the filter 11, and the speed of the fluid 8 passing the retaining section 5a is slower than the speed of the fluid 8 passing the filter 11.

Description

  The present invention relates to a filtration apparatus, and more particularly to an apparatus for separating gel-like unnecessary substances.

  A method of separating and removing unnecessary substances contained in a fluid using a filter is widely used. Patent Document 1 discloses a method for removing unnecessary materials using a filter. According to this, a filter is installed at the joint that connects the tubes. This filter has a through hole formed in a metal plate and is arranged so as to be orthogonal to the fluid. This filter removed thickened ink and solidified ink.

  In addition, Patent Document 2 discloses a method for removing unnecessary substances attached to the filter. According to this, the tube through which the ink flows is arranged in the horizontal direction, and the filter is arranged so as to be orthogonal to the tube. When the ink is made to flow, unnecessary substances adhere to the filter. Therefore, the flow of ink is sometimes stopped to prevent unwanted materials from being pressed against the filter. In this state, the unnecessary object is moved to the foreign substance reservoir by applying gravity to the unnecessary object.

JP 2008-183800 A JP 2009-6729 A

  When filtering with a filter, unwanted matter adheres to the filter. And when an unnecessary thing is a gel form, the pressure of a fluid acts on an unnecessary thing and an unnecessary thing deform | transforms. Some of the deformed unwanted material may pass through the filter. Therefore, there has been a demand for a filtration device that can prevent gel-like unnecessary materials from passing through the filter.

  SUMMARY An advantage of some aspects of the invention is to solve at least a part of the problems described above, and the invention can be implemented as the following forms or application examples.

[Application Example 1]
In the filtering device according to this application example, a filter that does not allow unnecessary materials to pass is installed in a flow path through which a fluid passes, and an upstream surface positioned on the upstream side of the filter is formed obliquely with respect to the traveling direction of the fluid. It is characterized by being.

  According to this filter device, since the filter is installed, the unnecessary matter existing in the fluid stops on the upstream surface. When the unwanted material is in a gel form, the fluid pressure acts on the unwanted material and deforms. Some of the deformed unwanted material may pass through the filter. In this application example, the upstream surface is formed obliquely with respect to the fluid traveling direction. As a result, the unwanted matter remaining on the upstream surface receives the pressure of the fluid and moves to the downstream side of the upstream surface. Accordingly, it is possible to prevent unnecessary materials from being deformed while remaining on the upstream surface and passing through the filter.

[Application Example 2]
In the filtration device according to the application example, a retention portion in which the unnecessary material is retained is provided on the downstream side of the upstream surface.

  According to this filtration device, the unwanted matter moves from the upstream surface to the staying portion and stays there. Therefore, since unnecessary materials are removed from the upstream surface, it is possible to prevent unnecessary materials from passing through the filter.

[Application Example 3]
In the filtration device according to the application example, the staying portion is formed in a concave shape in a direction intersecting a traveling direction of the fluid that passes through the filter, and the velocity of the fluid in the staying portion is the fluid that passes through the filter. The speed is lower than the speed of.

  According to this filtration device, the staying portion is formed in a concave shape. And since the speed of the fluid is a low speed, it is difficult for the unnecessary matter to be moved from the staying portion by the fluid. As a result, it is possible to make it difficult for unnecessary materials to move from the staying portion to the upstream surface of the filter.

[Application Example 4]
In the filtration device according to the application example described above, the retention portion includes a discharge port and a valve that opens and closes the discharge port.

  According to this filtration device, unnecessary substances can be discharged from the discharge port by opening the valve. Therefore, it is possible to prevent unnecessary materials from overflowing from the staying portion and returning to the upstream surface of the filter.

[Application Example 5]
In the filtering device according to the application example, the staying portion is formed to be recessed in the direction of gravity acceleration.

  According to this filtering device, the staying portion is recessed in the direction of gravitational acceleration. Therefore, it is possible to make it difficult for the unwanted matter that has moved into the staying portion by applying gravity to the unwanted matter from the staying portion. As a result, it is possible to prevent unwanted materials from overflowing from the retention portion and returning to the upstream surface of the filter.

In connection with the first embodiment, (a) is a schematic side sectional view showing a structure of a filtration device, and (b) is a schematic plan sectional view of the filtration device. The schematic diagram for demonstrating operation | movement of a filtration apparatus. In connection with the second embodiment, (a) is a schematic side sectional view showing a structure of a filtration device, and (b) is a schematic plan sectional view of the filtration device. In relation to the third embodiment, (a) is a schematic side sectional view showing the structure of the filtration device, and (b) is a schematic plan sectional view of the filtration device. In connection with the fourth embodiment, (a) is a schematic side sectional view showing the structure of a filtering device, and (b) is a schematic plan sectional view of the filtering device. In connection with the fifth embodiment, (a) is a schematic side sectional view showing the structure of a filtering device, and (b) is a schematic plan sectional view of the filtering device.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, embodiments of the invention will be described with reference to the drawings. In addition, each member in each drawing is illustrated with a different scale for each member in order to make the size recognizable on each drawing.

(First embodiment)
In the present embodiment, the characteristic filtering device of the present invention and the operation of the filtering device will be described with reference to FIGS. FIG. 1A is a schematic side sectional view showing the structure of the filtering device, and FIG. 1B is a schematic plan sectional view taken along the line AA ′ of the filtering device in FIG. As shown in FIG. 1, the filtration device 1 includes a substantially quadrangular prism-shaped exterior part 2, and the exterior part 2 is separated into a filtration part 4 and a side chamber 5 by a partition plate 3.

  The filtration device 1 is disposed between the upstream pipe 6 and the downstream pipe 7. The upstream side pipe 6 is connected to the filtering unit 4, and the fluid 8 flowing in the upstream side pipe 6 flows into the filtering unit 4. The downstream pipe 7 is also connected to the filtration unit 4, and the fluid 8 passing through the filtration unit 4 flows out to the downstream pipe 7. Accordingly, the fluid 8 flowing in the upstream pipe 6 flows through the downstream pipe 7 through the filtration unit 4. That is, the inside of the upstream pipe 6, the filtering unit 4, and the downstream pipe 7 is a single flow path, and this flow path is referred to as a first flow path 9.

  The fluid 8 travels in the gravitational acceleration direction 10. The gravitational acceleration direction 10 is the Z direction, and the direction in which the side chamber 5 is installed in the horizontal direction is the X direction. A direction orthogonal to the X direction is taken as a Y direction.

  A filter 11 is installed in the filtration unit 4 at an angle with respect to the traveling direction of the fluid 8. The filter 11 is a plate or sheet in which a large number of through holes 11a are formed. The fluid 8 flowing into the filtration unit 4 flows out of the filtration unit 4 after passing through the through hole 11a. When the solid waste 12 is contained in the fluid 8 flowing into the filtration unit 4, the waste 12 cannot pass through the through hole 11a. Therefore, when the upstream surface of the filter 11 is the upstream surface 11b, the unwanted material 12 stops on the upstream surface 11b.

  There are no particular limitations on the components of the fluid 8 and the type of the unwanted material 12. The fluid 8 may be a fluid that can flow, and can be applied to a fluid in which various materials are dissolved or dispersed. In this embodiment, for example, the fluid 8 is a fluid obtained by flowing a liquid in which a pigment is dispersed in a dispersion medium. The unnecessary material 12 includes a gel-like material in addition to the solid material. The unnecessary material 12 includes a material mixed in the previous process, a material formed by agglomeration or alteration of components constituting the fluid 8, and a material in which the liquid is thickened.

  The material of the filter 11 is not particularly limited as long as it is resistant to corrosion by the fluid 8 and can withstand the pressure of the fluid 8. An inorganic material such as a metal material, a resin material, or silicon, or a material surface-treated with these materials can be used. In the present embodiment, for example, a stainless plate is employed. The upstream surface 11b is preferably subjected to a process for reducing the unevenness so that the unnecessary object 12 can easily move. For example, the surface roughness may be reduced by performing a process such as buffing. In addition, the upstream surface 11b may be formed with a film in which the unnecessary material 12 can easily move. For example, a fluorine-based film may be formed on the upstream surface 11b. The thickness of the filter 11 is not particularly limited as long as the filter 11 has a strength that is not broken by the pressure of the fluid 8 and can filter the unnecessary matter 12.

  The diameter of the through hole 11a is not particularly limited, and may be set according to the size of the unnecessary object 12 to be filtered. In the present embodiment, for example, a substantially rectangular hole having a side of 20 micrometers is adopted as the through hole 11a. The method for forming the through hole 11a is not particularly limited, and various methods such as a photolithography method, a method of irradiating laser light, a method of making a hole using a die and a punch, and a method of making a hole with a drill can be used.

  In the partition plate 3, a first window portion 3 a is formed over the entire width in the Y direction at a location in contact with the filter 11, and the filtration portion 4 and the side chamber 5 communicate with each other through the first window portion 3 a. The upstream surface 11 b is connected to the side chamber 5. A part of the fluid 8 corresponding to the upstream surface 11b flows along the upstream surface 11b and passes through the first window portion 3a. A second flow path 13 is formed by the fluid 8 flowing from the filtration unit 4 to the side chamber 5. A second window 3 b is formed on the upstream pipe 6 side of the partition plate 3. The fluid 8 that has flowed into the side chamber 5 from the first window portion 3a flows out to the filtration portion 4 through the second window portion 3b. That is, the 2nd flow path 13 passes the 1st window part 3a, the side chamber 5, and the 2nd window part 3b. The size of the second window 3b is set so that the fluid resistance through which the fluid 8 passes through the second flow path 13 is larger than the fluid resistance through which the fluid 8 passes through the first flow path 9. Accordingly, the speed of the fluid 8 in the second flow path 13 is lower than the speed of the fluid 8 in the first flow path 9.

  A part of the side chamber 5 is a staying portion 5 a that is recessed in a direction that intersects the traveling direction of the fluid 8 that passes through the filter 11. Furthermore, the staying part 5a is also recessed in the gravitational acceleration direction 10 with respect to the upstream surface 11b. When the gravitational force acts on the unnecessary object 12 flowing into the side chamber 5, the unnecessary object 12 moves in the gravitational acceleration direction 10 in the staying portion 5a. And the unwanted material 12 stays in the stay part 5a. A discharge port 14 is installed in the gravitational acceleration direction 10 of the staying part 5 a, and a valve 15 is installed in the discharge port 14. When the unwanted matter 12 is accumulated in the staying part 5a, the accumulated unwanted matter 12 can be discharged from the outlet 14 by opening the valve 15.

  Next, the effect | action of a filtration apparatus is demonstrated using FIG. FIG. 2 is a schematic diagram for explaining the operation of the filtration device. As shown in FIG. 2A, the fluid 8 flows from the upstream pipe 6 into the filtration unit 4. As a result, the unwanted matter 12 contained in the fluid 8 also flows into the filtration unit 4. As shown in FIG. 2B, the filter 4 is provided with a filter 11. The fluid 8 passes through the filter 11 and flows out to the downstream pipe 7. Since the through hole 11a is formed in such a size that the unnecessary object 12 cannot pass through, the unnecessary object 12 stops on the upstream surface 11b.

  As shown in FIG. 2C, a part of the fluid 8 flowing through the first flow path 9 flows along the upstream surface 11b to the first window 3a. The unwanted material 12 located on the upstream surface 11 b is pushed by the fluid 8 and moves to the first window portion 3 a and flows into the side chamber 5. Even when the unnecessary object 12 is in the form of a gel, the unnecessary object 12 flows into the side chamber 5 while being deformed. In the second flow path 13 in the side chamber 5, the speed of the fluid 8 is low, and gravity acts on the unnecessary object 12, so that the unnecessary object 12 moves in the gravitational acceleration direction 10. As a result, as shown in FIG. 2 (d), the unwanted material 12 is deposited in the staying portion 5a.

As described above, this embodiment has the following effects.
(1) According to the present embodiment, since the filter 11 is installed in the filtration unit 4, the unnecessary matter 12 existing in the fluid 8 stops on the upstream surface 11b. When the unnecessary object 12 is in a gel form, the pressure of the fluid 8 acts on the unnecessary object 12 and deforms. A part of the deformed unnecessary material 12 easily passes through the filter 11. The upstream surface 11b is formed obliquely with respect to the fluid traveling direction. As a result, the unwanted matter that has stopped on the upstream surface 11b receives the pressure of the fluid 8 and moves to the side chamber 5 side of the upstream surface 11b. Therefore, even if the unnecessary object 12 is deformed, the unnecessary object 12 moves along the upstream surface 11b, so that the unnecessary object 12 can be prevented from passing through the filter 11.

  (2) According to this embodiment, the unwanted material 12 stays in the staying part 5a. Therefore, it is possible to prevent the unwanted matter 12 from returning to the upstream surface 11b of the filter 11 even when a lot of unwanted matter 12 accumulates.

  (3) According to this embodiment, the staying part 5a is formed in a concave shape in a direction intersecting with the traveling direction of the fluid 8 passing through the filter 11. And since the speed of the fluid 8 is adjusted to be a low speed in the staying part 5a, it is possible to make it difficult to move the unwanted matter 12 from the staying part 5a.

  (4) According to the present embodiment, the unnecessary object 12 can be discharged from the discharge port 14 by opening the valve 15. Therefore, it is possible to prevent the unnecessary material 12 from overflowing from the staying portion 5a and returning to the upstream surface 11b of the filter 11.

  (5) According to the present embodiment, the staying part 5 a is recessed in the gravitational acceleration direction 10. Therefore, it is possible to make it difficult for the unwanted matter 12 that has moved into the staying portion 5a by applying gravity to the unwanted matter 12 to come out of the staying portion 5a. As a result, it is possible to prevent the unnecessary material 12 from overflowing from the staying portion 5a and returning to the upstream surface 11b of the filter 11.

  (6) According to the present embodiment, since the unnecessary object 12 moves from the upstream surface 11b of the filter 11, the through hole 11a of the filter 11 can be hardly clogged. As a result, the frequency of replacing the filter 11 can be reduced.

(Second Embodiment)
Next, one embodiment of the filtration device will be described with reference to FIG. FIG. 3A is a schematic side sectional view showing the structure of the filtering device, and FIG. 3B is a schematic plan sectional view taken along the line BB ′ of the filtering device of FIG. This embodiment is different from the first embodiment in that the area of the filter 11 is increased. Note that description of the same points as in the first embodiment is omitted.

  That is, in this embodiment, as shown in FIG. 3, the filtration device 18 includes an exterior part 19, and the interior of the exterior part 19 is separated into the filtration part 20 and the side chamber 5 by the partition plate 3. A filter 21 is installed in the filtration unit 20 obliquely with respect to the traveling direction of the fluid 8. The filtration unit 20 has a cross-sectional area that is orthogonal to the traveling direction of the fluid 8 and is set wider than the filtration unit 4 of the first embodiment. The area of the filter 21 is also set wider than that of the filter 11 of the first embodiment. And the ratio of the area of the filter 21 with respect to the cross-sectional area of the upstream piping 6 and the downstream piping 7 is larger than 1st Embodiment.

  A number of through holes 21 a are formed in the filter 21. In the partition plate 3, a first window portion 3 a is formed over the entire width in the Y direction at a location in contact with the filter 21, and the filtration portion 20 and the side chamber 5 communicate with each other through the first window portion 3 a. An upstream surface 21 b that is an upstream surface of the filter 21 is connected to the side chamber 5.

As described above, this embodiment has the following effects.
(1) According to this embodiment, since the area of the filter 21 is set wide, the flow rate of the fluid 8 passing through the filtration device 18 can be increased.

(Third embodiment)
Next, one embodiment of the filtration device will be described with reference to FIG. 4A is a schematic side sectional view showing the structure of the filtration device, and FIG. 4B is a schematic plan sectional view taken along the line CC ′ of the filtration device of FIG. 4A. This embodiment is different from the first embodiment in that the side chamber 5 is not provided. Note that description of the same points as in the first embodiment is omitted.

  The filtering device 24 is disposed between the upstream pipe 6 and the downstream pipe 7. The filtration device 24 includes an exterior part 25, a filtration part 26 is formed inside the exterior part 25, and the fluid 8 flowing in the upstream side pipe 6 flows through the downstream side pipe 7 through the filtration part 26.

  A filter 27 is installed in the filtration unit 26 at an angle with respect to the traveling direction of the fluid 8. A number of through holes 27 a are formed in the filter 27. The fluid 8 flowing into the filtration unit 26 flows out of the filtration unit 26 after passing through the through hole 27a. When the unwanted substance 12 is contained in the fluid 8 flowing into the filtering part 26, the unwanted substance 12 cannot pass through the through hole 27a. Accordingly, when the upstream surface of the filter 27 is the upstream surface 27b, the unwanted material 12 stops on the upstream surface 27b.

  The filter 27 has a perforated region 27c where the through holes 27a are arranged in a matrix and a non-perforated region 27d where the through holes 27a are not formed. The perforated region 27c is disposed at a location closer to the upstream side than the non-perforated region 27d. The area ratio between the perforated region 27c and the non-perforated region 27d is not particularly limited, but in the present embodiment, for example, the ratio is 2: 1. The location of the non-hole region 27d on the upstream surface 27b is defined as a staying portion 28.

  When the waste material 12 is contained in the fluid 8, the waste material 12 cannot pass through the filter 27 and stops on the upstream surface 27b. The unwanted material 12 on the upstream surface 27 b is pushed by the fluid 8. Since the filter 27 is formed obliquely with respect to the traveling direction of the fluid 8, the unwanted matter 12 on the upstream surface 27b moves to the staying portion 28 along the upstream surface 27b. As a result, the unwanted material 12 is accumulated in the staying portion 28.

  Since the fluid 8 cannot pass through the non-hole region 27d in the staying portion 28, the fluid 8 stalls and flows upstream. Therefore, the unwanted matter 12 accumulated in the staying portion 28 is difficult to move.

As described above, this embodiment has the following effects.
(1) According to this embodiment, since the side chamber 5 is not installed, a simple structure can be achieved. When the unnecessary material 12 contained in the fluid 8 is small, it can be filtered by the filtration device 24 having a simple structure even when the unnecessary material 12 is in a gel form.

(Fourth embodiment)
Next, an embodiment of the filtration device will be described with reference to FIG. Fig.5 (a) is a typical sectional side view which shows the structure of a filtration apparatus, FIG.5 (b) is a typical plane sectional view which follows the DD 'line of the filtration apparatus of Fig.5 (a). The present embodiment is different from the first embodiment in that the fluid 8 flows in a direction opposite to the gravitational acceleration direction 10. Note that description of the same points as in the first embodiment is omitted.

  That is, in this embodiment, as shown in FIG. 5, the filtration device 31 includes an exterior part 32, and the exterior part 32 is separated into a filtration part 33 and a side chamber 34 by the partition plate 3. The filter 11 is installed in the filtration part 33 at an angle with respect to the traveling direction of the fluid 8.

  A large number of through holes 11 a are formed in the filter 11. In the partition plate 3, a first window portion 3 a is formed over the entire width in the Y direction at a location in contact with the filter 11, and the filtration portion 33 and the side chamber 34 communicate with each other through the first window portion 3 a. The upstream surface 11 b that is the upstream surface of the filter 11 is connected to the side chamber 34.

  A part of the side chamber 34 is a retention portion 34 a that is recessed in a direction that intersects the traveling direction of the fluid 8 that passes through the filter 11. Furthermore, the staying part 34a is also recessed in the gravitational acceleration direction 10. In the second flow path 13 in the side chamber 34, the speed of the fluid 8 is low, and gravity acts on the unnecessary material 12 that has flowed into the side chamber 34, so that the unnecessary material 12 moves in the gravitational acceleration direction 10 of the staying portion 34 a. And the unwanted material 12 stays in the stay part 34a. A discharge port 14 is installed in the gravitational acceleration direction 10 of the staying part 34 a, and a valve 15 is installed in the discharge port 14. When the unwanted matter 12 is accumulated in the staying part 34a, the accumulated unwanted matter 12 can be discharged from the outlet 14 by opening the valve 15.

As described above, this embodiment has the following effects.
(1) According to the present embodiment, the gel-like unnecessary object 12 can be separated from the fluid 8 even when the fluid 8 travels in the direction opposite to the gravitational acceleration direction 10.

(Fifth embodiment)
Next, one embodiment of the filtration device will be described with reference to FIG. FIG. 6A is a schematic side sectional view showing the structure of the filtration device, and FIG. 6B is a schematic plan sectional view taken along the line EE ′ of the filtration device of FIG. The present embodiment is different from the first embodiment in that the fluid 8 flows in a direction crossing the gravitational acceleration direction 10. Note that description of the same points as in the first embodiment is omitted.

  That is, in this embodiment, as shown in FIG. 6, the filtration device 37 includes an exterior part 38, and the exterior part 38 is separated into a filtration part 39 and a side chamber 40 by the partition plate 3. A filter 11 is installed in the filtration unit 39 at an angle with respect to the traveling direction of the fluid 8.

  A large number of through holes 11 a are formed in the filter 11. A first window 3a is formed in the partition plate 3 in contact with the filter 11 over the entire width in the Y direction, and the filtration unit 39 and the side chamber 40 communicate with each other through the first window 3a. The upstream surface 11 b that is the upstream surface of the filter 11 is connected to the side chamber 40.

  A part of the side chamber 40 is a staying portion 40 a that is recessed in a direction that intersects the traveling direction of the fluid 8 that passes through the filter 11. The direction in which the staying portion 40a is recessed is the gravitational acceleration direction 10. In the side chamber 40, the speed of the fluid 8 is low, and gravity acts on the unnecessary material 12 that has flowed into the side chamber 40. Then, the unwanted material 12 stays in the recessed staying portion 40a. A discharge port 14 is installed in the gravitational acceleration direction 10 of the filtration unit 39, and a valve 15 is installed in the discharge port 14. When the unwanted matter 12 is accumulated in the staying part 40a, the accumulated unwanted matter 12 can be discharged from the outlet 14 by opening the valve 15.

As described above, this embodiment has the following effects.
(1) According to the present embodiment, the gel-like unnecessary object 12 can be separated from the fluid 8 even when the fluid 8 travels in a direction crossing the gravitational acceleration direction 10.

In addition, this embodiment is not limited to embodiment mentioned above, A various change and improvement can also be added. A modification will be described below.
(Modification 1)
In the first embodiment, a plate or sheet in which a large number of through holes 11 a are formed in the filter 11 is used. The material of the filter 11 is not limited to this, and a filter formed by sintering metal particles, a mat-like filter composed of fibers, a plate or a sheet on which a large number of holes are formed, and the like are used. Also good. In this case as well, the gel-like unnecessary object 12 can be prevented from passing through the filter by arranging the filter obliquely with respect to the traveling direction of the fluid 8. This content can also be applied to the second to fifth embodiments.

  DESCRIPTION OF SYMBOLS 1,18,24,31,37 ... Filtration apparatus, 5a, 28, 34a, 40a ... Retention part, 8 ... Fluid, 9 ... 1st flow path as a flow path, 11, 21, 27 ... Filter, 11b, 27b ... upstream surface, 12 ... unnecessary items, 14 ... discharge port, 15 ... valve.

Claims (5)

  A filter device, wherein a filter that does not allow unnecessary materials to pass through is installed in a flow path through which a fluid passes, and an upstream surface located upstream of the filter is formed obliquely with respect to a traveling direction of the fluid. The filtration device according to claim 1,
A filtration device comprising a retention part in which the unnecessary material is retained downstream of the upstream surface. The filtration device according to claim 2,
The staying portion is formed in a concave shape in a direction intersecting the traveling direction of the fluid passing through the filter, and the speed of the fluid in the staying portion is lower than the speed of the fluid passing through the filter. A filtering device characterized. The filtration device according to claim 3,
The retention device includes a discharge port and a valve that opens and closes the discharge port. The filtration device according to claim 3,
The filtration device, wherein the stay portion is formed to be recessed in the direction of gravity acceleration.

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