JPH07724A - Filter - Google Patents

Abstract

PURPOSE:To provide a filter wherein a filter chamber is cleaned without filtration of feed water being interrupted. CONSTITUTION:A filter 1 is provided with plural filter chambers 21 (21c, 21g) in a filter main body 2. On the feed water inlet side 2a and on the filtrate outlet side 2b of the filter main body are arranged the 1st passage switching member 3 provided with a feed water feeding passage 31 through which feed water is passed, and the 2nd passage switching member 4 provided with a filtrate discharge passage 41 through which filtrate discharged from the filter main body is passed, respectively. In the 2nd passage switching member 4 and the 1st passage switching member 3 are formed a backwash fluid feeding passage 42 and a backwash fluid discharge passage 32, respectively. When the filter main body 2 is rotated, the filter chamber 21 used for the filtration of feed water is selected and also the other filter chamber 21 is brought into a backwash state.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filtration device, and more particularly,
The present invention relates to a structural technique for making it possible to clean a filtration chamber without interrupting the operation of filtering raw water.

[0002]

2. Description of the Related Art In a filtration apparatus, raw water is supplied from a raw water inlet of a filtration chamber, and foreign matter is filtered and separated by a filter medium filled therein to obtain filtered water. For this reason, foreign substances are accumulated in the filtration chamber as the filtration device is used. Therefore, it is necessary to supply washing water into the filtration chamber from the filtered water outlet to backwash and regenerate the filtration chamber. Here, as shown in FIG. 13A, the raw water supply passage 73 via the three-way valve 72 is provided in the filtration chamber 71 so that the filtration of the raw water and the backwashing of the filtration chamber can be easily switched. There is an apparatus in which a filtered water discharge passage 74 and a wash water discharge path 75 are connected. In this device, when filtering raw water, the three-way valve 72 is operated to supply the raw water supply passage 73.
And the filtered water discharge passage 74 is connected to the inside of the filtration chamber 71.
Further, in the case of performing backwashing, as shown in FIG. 13B, the three-way valve 72 is operated to connect the raw water supply passage 73 and the wash water discharge passage 74 to the inside of the filtration chamber 71.

[0003]

However, as shown in FIG.
Also in the filtration device shown in (a) and (b), the filtration chamber 71
Since the raw water cannot be filtered while the backwashing of the filtration chamber 71 is performed because the supply direction of the water is simply switched, the filtering operation must be interrupted each time the backwashing is performed. There is.

In view of the above problems, the object of the present invention is to
To provide a filtration device capable of cleaning a filtration chamber without interrupting the filtration operation of raw water by providing a plurality of filtration chambers in a filter body and switching between the filtration chambers to be used. is there.

[0005]

In order to solve the above-mentioned problems, in a filtration device according to the present invention, a filter body having a plurality of filtration chambers, and one of the filtration chambers on the raw water inlet side of the filtration chamber A first passage switching unit including a raw water supply passage connectable to a filtration chamber used for filtration, and a filtered water discharge passage connectable to the filtration chamber connected to the raw water supply passage on the filtered water outlet side of the filtration chamber. A second passage switching portion is provided, and the side of the passage switching portion and the side of the filter body are relatively movable, so that the raw water supply passage and the filtration can be adjusted according to the movement direction and movement amount. The filtration chamber connected to the water discharge passage is switchable.

The filtration device of the present invention includes not only a filter device for removing foreign matters in raw water but also an ion exchange device in which a filtration chamber is filled with an ion exchange resin or the like as a filter material.

The second passage switching portion is provided with a backwashing fluid supply passage that can be connected to the filtration chamber of the filtration chamber for backwashing, while the first passage switching portion is provided with backwashing fluid. The backwashing fluid discharge passage connectable to the filtration chamber connected to the working fluid supply passage is provided, and the backwashing fluid is moved by relatively moving the passage switching portion side and the filter body side. It is preferred that the filtration chambers connected to the supply passage and the backwashing fluid discharge passage be switchable.

In the present invention, when the raw water inlet and the filtered water outlet of the filtration chamber are arranged around the rotation center axis of the filter body, switching of the filtration chamber is performed by rotational movement around the rotation center axis of the filter body. Can be done easily by.

In the present invention, a filter plate may be provided on the side of the raw water inlet of the filtration chamber. In this case, the water passage portion is bent from one surface of the filter plate toward the other surface and penetrates therethrough. Is preferably provided so that foreign matter stops at the entrance of the water passage portion.

There is also a case where a filter medium filling section partitioned by a partition member having a plurality of penetrating portions is provided in the filter chamber and the filter medium filling section is filled with the filter medium. further,
In the filtration chamber, a filter medium filling section partitioned by a partition member having a plurality of penetrating portions is provided, and while the filter medium is filled therein, a filter plate may be provided on the raw water inlet side of the filtration chamber. In this case, it is preferable to provide a filter plate backwashing fluid supply passage that extends from the filtered water outlet side and supplies the backwashing fluid toward the filter plate near the end face of the filter plate on the filtered water outlet side. .

In the present invention, when the filter medium filling chamber is provided, in order to improve the efficiency of the back washing, the filter medium filling chamber is provided with a space through which the filter medium can diffuse during the back washing. It is preferable to set. Further, it is preferable that at least the surface of the partition member on the filter material filling portion side is an uneven surface capable of preventing the filter material from blocking the through portion. Further, it is preferable that the partition member is composed of a plurality of partition plates facing each other, and the filter medium is filled between the partition plates. Also in this case, it is preferable that the opposing surfaces of the partition plate are uneven surfaces that can prevent the filter material from blocking the penetrating portion.

Further, for the purpose of increasing the pressure resistance of the partition member, it is preferable that the partition member is composed of a partition plate having a recessed portion which is recessed in the feed direction of the raw water, and the penetrating portion is formed in the recessed portion. Further, the partition member may be composed of a plurality of partition plates that face each other, and the opposing surfaces of these partition plates may be connected to each other by a reinforcing portion to increase the pressure resistance in the thickness direction.

[0013]

In the filtration device according to the present invention, first, the relative positions of the filter body and the first passage switching portion and the second passage switching portion are switched to select the filtration chamber used for filtering the raw water. . When filtration is performed in this state and foreign matter is accumulated in the filtration chamber, the relative positions of the filter body and the first passage switching unit and the second passage switching unit are switched, and the filtration chamber, the raw water supply passage and the filtration unit are switched. The raw water is filtered by changing the combination of connection with the water discharge passage. Therefore, with the new combination, the filtration of the raw water can be continued in the filtration chamber to which the raw water supply passage and the filtered water discharge passage are connected. Further, since the filtration chamber previously used for filtration is separated from the raw water supply passage and the filtered water discharge passage, it is possible to perform back washing.

Here, when the backwashing fluid supply passage is provided in the second passage switching portion and the backwashing fluid discharge passage is provided in the second passage switching portion, foreign matter has accumulated in the filtration chamber. At this time, when the filtration chamber used for filtration is switched, the backwash fluid supply passage and the backwash fluid discharge passage are connected to the filtration chamber previously used for filtration instead of the raw water supply passage and the filtered water discharge passage. Then, the backwash can be performed as it is.

[0015]

Embodiments of the present invention will now be described with reference to the accompanying drawings.

[Embodiment 1] FIG. 1 is a vertical cross-sectional view schematically showing the structure of a main part of a filtration device according to a first embodiment of the present invention, FIG. 2 is a cross-sectional view thereof, and FIG. It is a perspective view which decomposes | disassembles and shows a component part typically.

In these figures, the filtration device 1 of this example is shown.
Are eight filtration chambers 21 (21a to 21a) divided in parallel inside the cylindrical filter body 2 along the filtering direction of the raw water.
1h), and each of the filtration chambers 21 has a filter plate 60 on the upper side (raw water inlet side 2a). In addition, in each of the filtration chambers 21, the partition member 50 having the penetrating portion is used.
It is divided into one filter medium filling section 20, and each filter medium filling section 20 is filled with a predetermined filter medium F. The filling amount of the filter medium F is set to an amount such that the void 20a can be secured above each filter medium filling portion 20.

The filter body 2 has an inlet communication pipe 2 which communicates with the raw water inlet side 2a inside the respective filtration chambers 21a to 21h.
2 is provided, and the inlet communication pipes 22c and 22g are shown in FIG.
Appears in. The filter body 2 includes an outlet communication pipe 23 that communicates with the inside of each of the filtration chambers 21a to 21h on the upper side (filtered water outlet side 2b) of the filtration chamber 21, of which the outlet communication pipes 23c and 23g appear in FIG. ing. Each filtration chamber 21a-
21 h is arranged around the central axis 24 of the filter body 2, and the openings of the inlet communication tube 22 and the outlet communication tube 23 are concentric around the extension of the central axis 24 of the filter body 2. It is located in a shape.

A drive motor 5 is attached to the center shaft 24, and a gear 52 fixed to an output rotary shaft 51 of the drive motor 5 meshes with an internal gear 24a attached to the inner peripheral surface of the filter body 2. Therefore, when the drive motor 5 is operated, the reduced rotational driving force is transmitted to the filter body 2 via the gears 24a and 51, so that the filter body 2 is
It rotates in the direction of arrow A with the central axis 24 as the central axis of rotation. In this example, the filter body 2 is rotated so that no matter which position the filter chamber 21 is rotated to, the filter chamber 21 is always positioned at the position of the filter chamber 21 shown in FIG.

The filtration apparatus 1 has a raw water supply passage 31 on the raw water inlet side 2a of the filtration chamber 21 for supplying raw water into any one of the filtration chambers 21a to 21h via an inlet communication pipe 22. It has a first passage switching member 3 provided. The filtered water outlet side 2b has a second passage switching member 4 having a filtered water discharge passage 41 for discharging filtered water from the filtration chamber 21 connected to the raw water supply passage 31 through the outlet communication pipe 23. is doing. The raw water supply system 11 is connected to the raw water supply passage 31 of the first passage switching member 3, and the filtered water discharge system 1 is connected to the filtered water discharge passage 41 of the second passage switching member 4.
2 is connected. The positions of the opening of the raw water supply passage 31 and the opening of the filtered water discharge passage 41 are determined by the inlet communication pipe 22.
And the position of the opening of the outlet communication pipe 23. Therefore, when the filter body 2 is rotated to switch the relative positions of the filter body 2 and the first passage switching member 3 and the second passage switching member 4, the raw water supply passage 31
The filtration chamber 21 to which the filtered water discharge passage 41 is connected is switched, and the filtration chamber 21 used for filtering the raw water is selected.

The second passage switching member 4 is provided with a backwashing fluid supply passage 42 to which a washing liquid or raw water for backwashing the filtration chamber 21 is supplied. The first passage switching member 3 is provided with a backwashing fluid discharge passage 32 through which the washing liquid is discharged from the filtration chamber 21. The backwashing fluid supply system 1 is provided in the backwashing fluid supply passage 42 of the second passage switching member 4.
3 is connected, and the backwashing fluid discharge system 14 is connected to the backwashing fluid discharge passage 32 of the first passage switching member 3.
The positions of the opening of the backwashing fluid supply passage 42 and the opening of the backwashing fluid discharge passage 32 also correspond to the positions of the opening of the inlet communication pipe 22 and the opening of the outlet communication pipe 23. Therefore, when the relative positions of the filter body 2 and the first passage switching member 3 and the second passage switching member 4 are switched to select the filtration chamber 21 used for filtering the raw water, the backwashing fluid supply is performed. The filtration chamber 21 to which the passage 42 and the backwashing fluid discharge passage 32 are connected is automatically selected.

In this example, the structures of the first passage switching member 3 and the second passage switching member 4 are eight filtration chambers 2.
Seven of the filtration chambers 1a to 21h are used for filtering raw water, and the other one filtration chamber is used for back washing.
For this reason, as shown in FIG. 3, the first passage switching member 3 is provided with seven raw water supply passages 31 and one backwashing fluid discharge passage 32. The second passage switching member 4 includes seven filtered water discharge passages 41 and one backwash fluid supply passage 4
2 and are provided. Here, the raw water supply passage 31 and the filtered water discharge passage 41 may be independent from each other, or may be configured as a large passage in which seven passages are connected to each other.

On the raw water inlet side 2a and the filtered water outlet side 2b of the filtration chamber 21, the inlet communication pipe 22 and the outlet communication pipe 23 are independent of each other, and the first passage switching member 3 is provided.
Alternatively, in addition to the one extending to the second passage switching member 4, the raw water inlet or the filtered water outlet is opened on the sliding surface formed on the upper end surface or the lower end surface of the filter body 2,
As shown by the dotted line in FIG. 3, it is possible to employ a member in which the raw water inlet or the filtered water outlet is opened on the sliding surface of the members 39a, 39b in contact with the first passage switching member 3 or the second passage switching member 4. In any case, a well-known watertight structure is adopted.

A method of using the thus configured filtering device 1 will be described.

First, the filtration chambers 21a-21 of the filter body 2 are
When the raw water is filtered by using the filtration chambers 21a to 21f and 21h among the h, and the back washing is performed in the filtration chamber 21g,
The filter body 2 is rotated with its central axis 21 as the central axis of rotation, and stopped at the position shown in FIG. In this state, the filtration chambers 21a to 21f and 21h are connected to the raw water supply system 1 through the inlet communication pipes 22a to 22f and 22h and the raw water supply passage 31 of the first passage switching member 3 on the raw water inlet side 2a.
Connect to 1. At the filtered water outlet side 2b, the filtration chamber 21
a to 21f and 21h are outlet communication pipes 23a to 23f and 2
3h and filtered water discharge passage 41 of second passage switching member 4
Connected to the filtered water discharge system 12 via. In this state, when raw water is supplied from the raw water supply system 11 into the filtration chambers 21a to 21f and 21h, foreign matter in the raw water is filtered into the filtration chambers 21a to 21h.
The filtered water is filtered and separated in f and 21h, and the filtered water is filtered from the filtering chamber 21a to
It is discharged from the filtered water discharge system 12 from 21f and 21h.

When foreign matter begins to accumulate in the filtration chamber 21 while performing filtration in this state, the filter body 2 is moved in the direction of arrow A with the central axis 21 as the center of rotation.
When rotated by 5 °, the filtration chambers 21a to 21e, 21g, 2
1h is the inlet communication pipe 22a to the raw water inlet side 2a.
It is connected to the raw water supply system 11 via 22e, 22g, 22h and the raw water supply passage 31 of the first passage switching member 3.
At the filtered water outlet side 2b, filtration chambers 21a to 21e, 2
1g, 21h, outlet communication pipes 23a-23e, 23g,
23h and filtered water discharge passage 4 of second passage switching member 4
Connected to the filtered water discharge system 12 via 1. Therefore, the raw water can be filtered in the filtration chambers 21a to 21e, 21g, and 21h.

On the other hand, the filtration chamber 21f is connected to the backwash fluid discharge system 14 on the raw water inlet side 2a via the inlet communication pipe 22f and the backwash fluid discharge passage 32 of the first passage switching member 3. Connecting. On the filtered water outlet side 2b, the filtration chamber 21f is connected to the backwashing fluid supply system 13 via the outlet communication pipe 23f and the backwashing fluid supply passage 42 of the second passage switching member 4. Therefore, the filtration chambers 21a-21
In e, 21g, and 21h, while washing the raw water, the washing water is supplied to the filtration chamber 21f from the backwashing fluid supply system 13 to perform the backwashing of the filtration chamber 21f. Here, the filtration chamber 21
The filter material F in the f is subjected to the fluid pressure of the washing water and is soared in the void 20 as shown by the broken line to be sufficiently dispersed, so that the foreign matter is efficiently discharged from the washing chamber 21f.

As described above, in the filtering apparatus 1 of this example, when foreign matter is accumulated in the filtering chamber 21 while the raw water is being filtered, the filter body 2 and the first passage switching member are provided. The positions of the third and second passage switching members 4 are switched, and the other filtration chamber 21 is used for filtering raw water. For this reason,
While filtering the raw water, to the filtration chamber 21 separated from the raw water supply passage 31 and the filtered water discharge passage 41,
Backwash can be performed. Therefore, it is possible to prevent clogging by regularly performing back washing before a large amount of foreign matter is accumulated in the filtration chamber 21. Further, even if any one of the filtration chambers 21 is clogged, the back washing can be performed without interrupting the filtration. Therefore, the filtering device 1 of the present example is similar to the case of filtering the raw water of the hot spring and supplying the filtered water to each faucet.
It is suitable for applications such as when foreign matter is easily clogged inside and the supply of filtered water cannot be interrupted.

[Embodiment 2] FIG. 4 (a) is a sectional view of the structure of a filter plate used in a filter device according to Embodiment 2 of the present invention, and FIG. 4 (b) is a bottom view thereof.

Since the filtering device according to any of the embodiments described below has the same structure as that of the filtering device according to the first embodiment, common parts are designated by the same reference numerals,
The illustration and description thereof are omitted.

The filtration apparatus 1 of the present embodiment has a structure that the raw water inlet side 2a of the filtration chamber 21 has a structure shown in FIG. 4 so that hair and the like do not enter the filtration chamber 21 even when it is used for regenerating the bath water.
A filter plate 60 shown in (a) and (b) is provided. The filter plate 60 is configured by stacking a front surface side filter plate 61 and a back surface side filter plate 62. The filter plate 60 has a plurality of water passage portions 63 formed therethrough,
Each of the water passage portions 63 has five openings 61a having a small inner diameter formed on the front surface side filter plate 61 side, and one opening portion 61b having a large inner diameter connected to the openings 61a.
And the opening 61a on the rear filter plate 62 side.
And the four openings 62a formed between the formation positions of. Here, the formation position of the opening 62 is deviated from the formation position of the opening 61a, but a part thereof overlaps the formation position of the opening 61b. Therefore, the cross-sectional shape of the water passage portion 63 is the raw water inlet side. The structure has a bent portion 63c that is bent and penetrates from the surface 2a toward the surface on the side of the filtration chamber 21.

Therefore, even when the bath water mixed with hair or the like is supplied to the filtration device 1, the bath water flows into the filtration chamber 21 through the water passage portion 63 as shown by an arrow B in FIG. 4 (a). However, as shown by the dotted line in FIG.
It stops at 3c (the entrance of the water passage portion 63). Therefore, the filtration chamber 2
No. 1 does not get clogged with hair H, and when backwashing is performed by supplying a backwashing fluid from the direction of arrow C, hair H
Are easily removed from it.

[Modification of Embodiment 2] FIG. 5A is a plan view of a filter plate used in a filter device according to a modification of Embodiment 2 of the present invention, and FIG. 5B is a sectional view thereof. , FIG. 5 (c)
FIG. 3 is an explanatory view showing a part of the enlarged view.

In these figures, the filter plate 60a arranged on the side of the raw water inlet 2a of the filtration chamber 21 is composed of four mesh plates 601 in which a large number of wires 601b are vertically stretched inside the ring body 601a. , And three mesh plates 602 having a large number of wires 602b stretched laterally inside the ring body 602a are alternately stacked. Therefore, the water passage portion 631 constituted by the gap between the wires 601b and 602b is, as shown by an arrow B1 (solid arrow) and an arrow B2 (dotted arrow) in FIG.
It is in a state of being bent at an intermediate position from the surface on the side of the raw water inlet 2a to the penetration to the back surface.

Therefore, when viewed from the uppermost net plate 601 side, the raw water which has passed through the gap of the wire 601b is blocked by the wire 602b of the second net plate 602 as shown by the arrow B1. As indicated by an arrow B2, after making a detour in the lateral direction, it will pass through the gap of the wire 602b and pass through the mesh plate 601 of the third stage. Therefore, foreign matter such as hair stops on the uppermost net plate 601 side, and therefore the foreign matter can be easily removed by backwashing.

Here, although the wires 601b and 602b of the mesh plates 601 and 602 constituting the filter plate 60a have a circular cross-sectional shape, FIG. 6A shows a plan view of another filter plate. 6 (b) is a sectional view thereof, FIG. 6 (c).
As shown in an enlarged view of a part of the ring body 603,
a, wire 603 with a rectangular cross-section inside 604a
The filter plate 60b may be configured by alternately superposing the mesh plates 603 and 604 having the b and 604b stretched thereon.

[Embodiment 3] FIG. 7A is a cross-sectional view of one of the filtration chambers of the filtration device according to Embodiment 3 of the present invention, and FIG. 7B is a filter plate backwash provided therein. It is explanatory drawing which shows the shape of the front end side of the working fluid supply passage.

In the filtration chamber 21 of the filtration device 1 of this embodiment, two series of filter plate backwashing fluids are provided extending from the filtered water outlet side 2b and discharging compressed air for backwashing near the filter plate 60. A supply passage 70 is arranged. The front end side 70a of the filter plate backwashing fluid supply passage 70 spirally circulates between the filter plate 60 and the partition member 50, and the backwashing fluid is directed toward the filter plate 60 on the upper surface side thereof. The ejection hole 71 for ejecting is opened. The connection state of the base plate side 70b of the filter plate backwashing fluid supply passage 70 can be switched by the second passage switching member 4.

In the filtration device 1 of this embodiment, the filler F in the filtration chamber 21 can be washed with the backwashing fluid supplied from the outlet communication pipe 23, while the filter plate 60 is provided with a filter as shown by an arrow D. It is possible to directly wash with the compressed air jetted from the jet holes 71 of the plate backwashing fluid supply passage 70,
The filler F does not hinder the cleaning of the filter plate 60. Therefore,
The foreign matter clogged in the water passage portion 63 of the filter plate 60 can be reliably removed.

[Embodiment 4] FIG. 8 (a) is a sectional view showing the construction of a partition member for partitioning a filtration chamber of a filtration device according to Embodiment 4 of the present invention, and FIG. 8 (b) is a plan view thereof. Is.

The partition member 50 used in the filtration chamber 21 of the filtration device 1 of this embodiment is composed of a corrugated plate 51, and the peak portion 51 thereof.
A plurality of penetrating portions 51c are formed in each of the a and the valley portion 51b. Here, the valley portion 51b is narrowed in the vicinity of the position where the penetrating portion 51c opens so that the filter medium F does not enter the penetrating portion 51c. Further, the penetrating portion 51c of the ridge portion 51a is maintained in an open state by the gap of the filter medium F.

Therefore, the filter medium F does not block any of the through portions 51c of the valley portion 51b and the peak portion 51a, so that the through portion 51c is not clogged with the filter medium F. Therefore, the filtration device 1 can maintain high filtration efficiency.

As a partition member which does not cause clogging of the filter medium F, FIG. 9A shows a sectional shape.
Like the partition plate 52 having a planar shape in (b), the side of the filtration chamber 21 may be an uneven surface, and the through portion 52c may be opened at the convex portion 52a and the concave portion 52b. In this case as well, the recess 52b is set to have a width in which the filter medium F is movable, and the position of the filter medium F is restricted by the tapered side surface 52d. Does not clog.

[Embodiment 5] FIG. 10A is a sectional view showing the structure of a partition member for partitioning a filtration chamber of a filtration apparatus according to Embodiment 5 of the present invention, and FIG. 10B is a plan view thereof. Is.

Partition member 53 used in the filtration device 1 of this example
9A and 9B, the uneven surfaces of the partition plate 52 shown in FIGS. 9A and 9B are opposed to each other via a spacer 54, and the filter medium F is filled between the partition plates 52. .

Therefore, the partition member 53 itself also has a filtering ability. Moreover, the penetrating portion 52c of the partition plate 52 is not clogged with the filter medium F.

[Sixth Embodiment] FIGS. 11A to 11D show the structure of a partition member for partitioning a filtration chamber of a filtration device according to a sixth embodiment of the present invention. 11 is a vertical sectional view thereof, and FIG. 11B is a plan view thereof.
FIG. 11C is an explanatory diagram showing an enlarged plan view of one of the recesses formed therein, and FIG. 11D is a vertical sectional view thereof.

In these figures, the partition member 55
Is composed of two partition plates 56 and 57, and each of the partition plates 56 and 57 has a large number of recesses 56a and 57a recessed inward. Here, FIG.
As shown in (d), the penetrating portions 56b and 57b are formed only in the concave portions 56a and 57a, and are not formed in the flat surface portions 56c and 57c of the partition plates 56 and 57.

Therefore, even if a large number of through portions 56b and 57b are formed on the partition plates 56 and 57, the pressure resistance in the thickness direction of the partition member 55 is such that the flat portion 56c in which the through portions 56b and 57b are not formed, It remains high at 57c. Therefore,
Even when the raw water is supplied at a high pressure in the direction of arrow E and the backwashing fluid is supplied at a high pressure in the direction of arrow G, the partition plates 56 and 57 do not withstand the fluid pressure and are not deformed. Is possible.

Further, as a partition member having a high withstand voltage structure,
It is also possible to use the one whose longitudinal section is shown in FIG.

The partition member 58 includes a large number of through portions 58.
It is composed of two partition plates 58a and 58b in which c is formed, and a reinforcing portion 59 connecting the facing surfaces of these partition plates 58a and 58b. The reinforcing portion 59 is shown in FIG.
As shown in the plan view in (b), the partition plates 58a, 58
The partition plates 58a, 58b are formed in a spiral shape between b and
Since the entire surface of the partition member 58 is supported, the pressure resistance in the thickness direction of the partition member 58 is high.

(Other Embodiments) In addition, in the filtering apparatus 1, in addition to the use of washing water as a fluid for backwashing, compressed air blown into the filtering chamber 21 as in the fifth embodiment is used. It may be a fluid for backwashing. In addition, the filtration chamber 2
In switching of No. 1, instead of the side of the filter body 2, the first passage switching member 3 and the second passage switching member 4 are provided.
The side may be rotated. Further, in the filtering device 1 of the present example, the filtering device 1 can be configured as an ion exchange device by using an ion exchange resin as the filter medium F. In this case, the back washing can be performed by removing the foreign matters and the ion exchange resin. The resin will be regenerated.

Further, the number and size of the filtration chambers constituting the filtering device, the number and size of the passages corresponding to the raw water inlet or the filtered water outlet thereof, etc. should be optimized according to the use and ability of the filtering device. It is of a nature to be designed, without limitation. Also, a recess formed in the partition member or the filter plate,
There is no limitation on the shape or number of the penetrating parts or water passing parts,
For example, an elongated hole-shaped penetrating portion may be used.

[0054]

As described above, in the filtration device according to the present invention, a plurality of filtration chambers are provided on the filter body side, and the raw water inlet side and the filtered water outlet side of the filtration chamber are connected to each other. It is characterized in that it has a first passage switching unit and a second passage switching unit whose connection states are switched. Therefore, according to the present invention, even if foreign matter is accumulated in the filtration chamber, the connection state between the filtration chamber and the raw water supply passage is switched,
While the raw water is continuously filtered in one of the filtration chambers, the other filtration chamber can be washed.

When a passage for backwashing fluid is also formed in the first passage switching portion and the second passage switching portion, the other filtration chambers are automatically operated in association with the selection of the filtration chamber for performing filtration. Since it becomes possible to clean the substrate, it is not necessary to switch the route for back-cleaning.

When voids are ensured in the filter chamber filled with the filter medium, the filter medium rises up during the backwash and is sufficiently stirred, so that the filter can be efficiently washed.

In the present invention, when the water passage portion of the filter plate provided on the raw water inlet side of the filtration chamber is bent,
Since hair and the like stop at the entrance of the water passage portion, hair does not enter the filtration chamber, and foreign matter can be easily removed by backwashing. Further, when the filter plate backwashing fluid supply passage for supplying the backwashing fluid is provided in the vicinity of the filter plate, the high pressure backwashing fluid can be directly supplied to the filter plate, so that the filter plate can be efficiently used. Can be backwashed well.

When the partition member of the filtration chamber is provided with irregularities, it is possible to prevent the filter material from blocking the penetrating portion.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view schematically showing the configuration of a filtration device according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view schematically showing the configuration of the filtration device shown in FIG.

FIG. 3 is a perspective view schematically showing the components by disassembling the filtering device shown in FIG.

4A is a vertical cross-sectional view of a filter plate used in a filtering device according to a second embodiment of the present invention, and FIG. 4B is a bottom view thereof.

5A is a plan view of a filter plate used in a filter device according to a modification of the second embodiment of the present invention, FIG. 5B is a cross-sectional view thereof, and FIG. FIG.

6A is a plan view of a filter plate used in a filter device according to another modification of the second embodiment of the present invention, FIG. 6B is a cross-sectional view thereof, and FIG. 6C is a part thereof. It is explanatory drawing which expands and shows.

7A is a vertical cross-sectional view of one of the filtration chambers of the filtration device according to the third embodiment of the present invention, and FIG. 7B is the tip side of the filter plate backwashing fluid supply passage provided therein. It is explanatory drawing which shows the shape of.

FIG. 8A is a vertical cross-sectional view of a partition member that partitions a filtration chamber of a filtration device according to a fourth embodiment of the present invention, and FIG. 8B is a plan view thereof.

9A is a vertical cross-sectional view showing a configuration of a partition member that partitions a filtration chamber of a filtration device according to a modified example of the fourth embodiment of the present invention, and FIG. 9B is a plan view thereof.

FIG. 10A is a vertical cross-sectional view showing the configuration of a partition member that partitions a filtration chamber of a filtration device according to a fifth embodiment of the present invention;
(B) is the top view.

FIG. 11A is a vertical cross-sectional view of a partition member that partitions a filtration chamber of a filtration device according to a sixth embodiment of the present invention, and FIG.
The plan view, (c), shows one of the recesses formed in it.
FIG. 3D is an explanatory view showing two plane shapes in an enlarged manner, and FIG.

FIG. 12A is a vertical cross-sectional view of a partition member that partitions a filtration chamber of a filtration device according to a modification of the sixth embodiment of the present invention;
(B) is explanatory drawing which shows the planar shape of the reinforcement part.

FIG. 13 (a) is an explanatory view showing a state in which raw water is filtered in a conventional filtration device, and FIG. 13 (b) is an explanatory diagram showing a state in which back washing is performed.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Filtration device 2 ... Filter main body 2a ... Raw water inlet side 2b ... Raw water outlet side 3 ... 1st passage switching member 4 ... 2nd passage switching member 11 ... -Raw water supply system 12 ... filtered water discharge system 13 ... backwash fluid supply system 14 ... backwash fluid discharge system 20 ... voids 21, 21a to 21h ... ... filtration chamber 22, 22a to 22h ... Inlet communication pipe 23, 23a to 23h ... Outlet communication pipe 24 ... Central shaft 31 ... Raw water supply passage 32 ... Backwashing fluid discharge passage 41 ... Filtered water discharge Passage 42 ... Backwashing fluid supply passage 50, 53, 55, 58 ... Partition member 51 ... Corrugated plate 51c, 52c, 56b, 57b, 58c ... Penetrating portion 52, 56, 57, 58a , 58b ... Partition plates 56a, 57a ... Recessed portion 59 ... Reinforcement portion 60 , 60a, 60b ... Filter plate 63, 631 ... Water passage portion 70 ... Filter plate backwashing fluid supply passage F ... Filter medium

Claims (12)

[Claims] 1. A first passage switching device comprising a filter body having a plurality of filtration chambers, and a raw water supply passage connectable to a filtration chamber of the filtration chamber used for filtration in a raw water inlet side of the filtration chamber. And a second passage switching portion having a filtered water discharge passage connectable to the filtration chamber connected to the raw water supply passage on the filtered water outlet side of the filtration chamber. The side and the side of the filter body are relatively movable, and depending on the moving direction and the moving amount,
A filtration device capable of switching between filtration chambers connected to the raw water supply passage and the filtered water discharge passage. 2. The first passage switching unit according to claim 1, wherein the second passage switching unit includes a backwashing fluid supply passage connectable to a filtration chamber of the filtration chamber that performs backwashing. The portion includes a backwashing fluid discharge passage connectable to a filtration chamber connected to the backwashing fluid supply passage, and relatively moves the passage switching portion side and the filter body side. Thus, the filtration device connected to the backwashing fluid supply passage and the backwashing fluid discharge passage can be switched. 3. The raw water inlet and the filtered water outlet of the filtration chamber according to claim 1 or 2, wherein the raw water inlet and the filtered water outlet are arranged around a rotation center axis of the filter body, and the filtration chamber is switched by the filtration device. A filtration device, characterized in that it is carried out by rotational movement of the main body around the central axis of rotation. 4. The filter plate according to any one of claims 1 to 3, wherein a water passage portion penetrating from a surface on the raw water inlet side to a back surface is bent at an intermediate position on the raw water inlet side of the filtration chamber. A filtering device comprising: 5. The filtering device according to claim 1, wherein the filtering chamber has a filter medium filling section partitioned by a partition member having a plurality of penetrating sections. 6. The filter chamber according to any one of claims 1 to 3, wherein the filter chamber is provided with a filter medium filling section partitioned by a partition member having a plurality of penetrating portions, and a raw water inlet side of the filter chamber. For the backwashing of the arranged filter plate, a filter plate that extends from the filtered water outlet side and supplies a fluid for backwashing toward the filter plate in the vicinity of the end face of the filter plate on the filtered water outlet side A filter device having a fluid supply passage. 7. The filtration device according to claim 5, wherein the filter medium filling section has a space in which the filter medium filled therein can diffuse when backwashing. 8. The filtration according to claim 5, wherein at least a surface of the partition member on the filter material filling portion side is an uneven surface capable of preventing the filter material from blocking the penetrating portion. apparatus. 9. The filtering device according to claim 5, wherein the partition member is composed of a plurality of partition plates facing each other, and a filter medium is filled between the partition plates. 10. The filtering device according to claim 9, wherein the opposing surfaces of the partition plate are uneven surfaces capable of preventing the filter material from blocking the penetrating portion. 11. The partition member according to claim 5 or 6, wherein at least an end surface of the partition member on the raw water inlet side is formed by a partition plate having a recessed portion in the raw water supply direction, and the through portion is formed in the recessed portion. A filtering device characterized by the above. 12. The partition member according to claim 5, wherein the partition member is composed of a plurality of partition plates facing each other, and the facing surfaces of these partition plates are connected by a reinforcing portion. Filtering device.