JP2003164710A - Filtering apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a filtering apparatus that is capable of securing stabilized filtration performance. <P>SOLUTION: This filtering apparatus is provided with flange parts 17 in the inner periphery of a filtering device 1 between a filter medium 9 and a mirror plate 3b along the peripheral direction at predetermined distances. When a raw water having a fast flow rate is introduced, a stream of water that flows into the inner periphery of a barrel part 3a along the inner surface of the mirror plate 3b is dispersed to the center by peeling it from the inner surface by the flange part 17 and the remainder of the stream of water is allowed to flow into the filter medium 9 along the inner periphery of the barrel part 3a as it is by means of a part without any flange part 17. Thus, the raw water flows down uniformly to the filter medium 9 even if the flow rate through the filter medium 9 is high. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention uses a filter medium to
For example, it relates to a filtration device for removing impurities dissolved in well water.

[0002]

2. Description of the Related Art In general, impurities such as iron dissolved in well water are removed by injecting a sodium hypochlorite solution into the well water to oxidize the iron contained in the well water. ) Is filtered with a filter to separate and remove iron contained in well water.

[0003] In a domestic iron removal filter, a particulate filter material is housed in a cylindrical container having a vertical shape, and well water (raw water) is supplied from the upper surface of the filter material layer to obtain a filter material. A structure is used that allows well water to pass through the layer. Then, the iron content contained is separated and removed while the well water passes through the filter medium.

By the way, in the filter, if the well water does not flow uniformly through each part of the filter layer, the filtering function does not function effectively and the treatment capacity is lowered, or the filter layer is clogged early. Or

Therefore, in the conventional iron removing filter, the end wall that closes the upper end of the container is formed in the shape of a dish or a spherical surface having a convex upper side, and the inflow pipe is used to abut against the inner surface of the end wall. In this way, well water (raw water) is made to flow out, and the well water after hitting is made to flow into the filter medium.

Specifically, as shown in FIG. 5, the inflow pipe a has, for example, a curved end wall c of a container b having one end.
A structure is used in which it is arranged so as to open directly below the center of the inner surface and the other end is opened to the outside of the container b. Well water (raw water) flowing out of the inflow pipe a hits the inner surface of the end wall c. The behavior was used for dispersion.

[0007]

By the way, the inflow pipe a
The flow velocity of the well water (raw water) flowing out from the plant changes depending on the water supply situation (usage situation), etc.

However, since the structure in which the raw water is applied to the inner surface of the end wall c does not have momentum when the flow velocity of the well water (raw water) is low (slow), the well water hits the inner surface of the end wall c. After that, it shows a behavior of being dispersed from each part on the inner surface of the end wall c and flowing into each part on the upper surface of the filter medium layer. However, when the flow velocity of the raw water is high (fast), there is momentum, so the arrow in FIG. As shown in A, when the raw water hits the inner surface of the end wall d, it flows along the inner surface as it is to the outer peripheral end of the end wall d, and along the inner peripheral surface of the storage container b as it is, to the outer peripheral portion of the filter medium layer. Concentrate and flow in.

On the other hand, in the domestic iron-removing filter, the filtering speed of the filter material layer is made as fast as possible because of the demands for lightness and compactness (due to the limited installation space).

For this reason, in a domestic iron removal filter, when the well water (raw water) has a high flow velocity, the well water remains in a non-uniform state in which it flows into the outer peripheral portion in a concentrated manner without flowing into the center. And the filtration capacity of the filter is lowered, and the filter material d is clogged early. In addition, the shape of the inlet side of the filter medium d is changed to a mountain shape in which the outer peripheral side is recessed and the center is raised due to this flow, and there is a problem that the filtering ability of each part of the filter medium layer is changed.

Therefore, the present invention provides a filtration device capable of ensuring stable filtration performance.

[0012]

According to a first aspect of the present invention, there is provided a brim portion protruding from the inner circumferential surface at a predetermined interval on the inner circumferential surface between the filter medium and the end wall of the tubular portion. By adopting the structure provided, when raw water with a high flow velocity flows out, the collar part receives and separates the water flow that flows into the inner peripheral surface of the tubular part along the inner surface of the end wall and separates it to the center of the tubular part. In addition to being dispersed, the water flow flowing into the inner peripheral surface of the tubular portion is allowed to flow as it is along the inner peripheral surface of the tubular portion by the portion having no collar portion.

Due to the flow that separates the water flow from the inner surface and disperses it in the center and the flow that flows along the inner surface as it is, even if the filtration flow velocity of the filter medium is high (fast), the raw water flows down uniformly to each part of the filter medium. To be done.

According to a second aspect of the present invention, there is provided a filtering device that uses a filter in which the tubular portion and the end wall are detachably connected to each other by a flange, and at least one of the tubular portion and the end wall has a flange. Collars were formed on the peripheral surface so as to protrude at predetermined intervals along the peripheral direction.

According to a third aspect of the present invention, there is also provided a filter device in which a tubular portion and an end wall are detachably connected to each other with an annular gasket member interposed therebetween, and the filter is attached to an inner peripheral surface of the gasket member. The collar portion was formed so as to project at a predetermined interval along the circumferential direction.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below with reference to the first embodiment shown in FIGS.

FIG. 1 shows, for example, a filter device for wells used in general households, and in the drawing, 1 is a filter for removing iron, for example.

The filter 1 is composed of a vertical cylindrical tank (container). The cylindrical tank has a cylindrical body 3a (corresponding to a cylindrical portion) whose lower part is closed and whose upper end is open, and a plate-like or spherical end plate 3b which closes the upper end of the body 3a. (Corresponding to the end wall) and. The upper end of the body portion 3a and the open end of the end plate 3b are detachably connected to each other by using an annular flange 4 attached to the outer peripheral portion of each open end. Specifically, the flanges 4 and 4 are detachably fastened to each other with a plurality of bolts 6 by sandwiching an annular gasket member 5 (sealing member) between the flanges 4 and 4. Note that the entire tank is installed vertically using a plurality of legs 7 protruding from the closed end of the body portion 3a.

In the body portion 3a, a particulate filter material 9 (for example, filter sand) is housed between a point near the opening and the bottom filter chamber 8. As a result, a filter material layer having the upper surface as an inlet is formed. The filtration flow rate of this filter material layer is high. Further, a filter 10 whose upper surface is closed is embedded immediately above the filtration chamber 8 to form a two-stage filtration structure with a filter material layer and the filter 10.

On the other hand, an inflow chamber 11 is formed between the end plate 3b and the upper surface (inlet) of the filter material layer facing the end plate 3b by using the space therebetween. An inflow pipe 12 is housed in the inflow chamber 11. The inflow pipe 12 has a horizontal pipe 14a extending from a pedestal 13 installed on the peripheral wall of the body 3a on the opening side to the center in the body 3a, and a vertical pipe rising from the end of the horizontal pipe 14a to near the center of the inner surface of the end plate 3b. It has piping 14b. An end of the horizontal pipe 14 a (one end of the inflow pipe 12) is connected to the inflow port 15 formed in the pedestal 13. In addition, the end of the vertical pipe 14b (the inflow is regrettable 12
The other end) faces the inner surface of the end plate 3b and serves as an outlet hole 16. Then, for example, a water supply pump (not shown) for pumping well water and a sterilizer (not shown) for injecting sodium hypochlorite solution into the well water (raw water) are sequentially connected to the inflow port 15 and the water supply pump is operated. The well water (raw water) that has been subjected to the oxidation treatment is allowed to flow into the inflow chamber 11 while colliding with the inner surface of the end plate 3b. That is, the well water at the end of the oxidation treatment is supplied to the inlet of the filter medium layer after flowing out upward (direction opposite to the filter medium layer) and further colliding with the end plate 3b.

Further, a plurality of flanges 17 are circumferentially provided at a portion of the inner peripheral surface of the filter 1 between the end plate 3b and the upper surface of the filter material layer, for example, a connecting portion between the body 3a and the end plate 3b. It is formed along a predetermined interval (intermittently).

The flange portion 17 is formed, for example, by using the flange 4 attached to the end plate 3b. For details, see Mitsuba 3.
For b, for example, as shown in FIG. 2, as the material of the flange 4, an annular plate member 4a whose inner peripheral side protrudes inward of the end plate 3b is used, and the inner peripheral part of the plate member 4a is spaced at regular intervals. A structure in which a notch portion 18 having a depth reaching the inner surface of, and a predetermined width dimension is formed is used.
When the end plate 3b and the body part 3a are combined, as shown in FIG. 1, the protrusions between the notches 18 project from the inner peripheral surfaces of the body part 3a and the end plate 3b, and a plurality of parts are formed on the horizontal plane formed by the flange 4. The brim portion 17 is intermittently formed.

With this structure, a part of the water flow that flows along the inner surface of the end plate 3b to the inner surface of the body portion 3a is separated from the inner surface by the collar portion 17 and dispersed to the center side of the inflow chamber 15,
A part of it is allowed to flow along the inner surface of the body portion 3a as it is through the notch portion 18.

An outflow pipe 20 is connected between the filtration chamber 8 and the outflow port 19 formed in the pedestal 13. A water supply facility (not shown) is connected to the outflow port 19 of the outflow pipe 20 so that the water that has been filtered can be led to the water supply facility through the outflow pipe 20.

When purifying water with the thus constructed filter 1, well water (raw water) that has been subjected to oxidation treatment is supplied to the inflow pipe 12 by the water supply pump.

Then, the well water is discharged from the outlet hole 16 of the inflow pipe 12 so as to hit the center of the inner surface of the end plate 3b immediately above.

At this time, depending on the water supply situation (use situation),
It is assumed that the well water is supplied to the filter 1 at a low (slow) flow rate.

At this time, since the well water has no momentum, after hitting the inner surface of the end plate 3b, the well water is dispersed from each part of the inner surface and uniformly flows into each part of the upper surface (inlet) of the filter material layer. . While the well water that has flowed in passes through each part of the filter medium 9 and further passes through the filter 10, the iron content contained therein is separated and removed by filtration. Then, the well water that has undergone the filtration process passes through the filtration chamber 8 and the outflow pipe 20,
It is sent to the water supply facility.

It is also assumed that well water is supplied to the filter 1 at a high (fast) flow rate.

At this time, because the well water has momentum,
The well water that hits the inner surface of the end plate 3b flows radially along the inner surface of the end plate 3b to the outer peripheral edge, and remains as it is.
Head toward the inner surface of a.

At this time, a plurality of flanges 17 projecting inward are provided on the outer peripheral side of the end plate 3b.

Therefore, as shown by the arrow A in FIG. 1, the water flow flowing along the inner surface of the end plate 3b to the inner peripheral surface of the body portion 3a is indicated by the arrow A1 at each point where the collar portion 17 is present. As described above, the collar portions 17 receive the water flow, are separated from the inner peripheral surface, and are dispersed in the center of the inflow chamber 11. Further, at each point (the cutout portion 18) where the collar portion 17 is absent, as shown by an arrow A2, it flows out through the cutout portion 18 as it is to the inner peripheral surface of the body portion 3a.

As a result, the filter 1 is provided in the inflow chamber 11.
Flow of well water to be dispersed in the center of the
The flow of well water along the inner surface of the well is formed, and the well water uniformly flows into the filter medium layer from each part of the upper surface forming the inlet.

As a result, as in the case where the well water flow rate is low, the well water flows down uniformly through the layer of the filter medium 9 and the filtration process is performed.

Therefore, the well water is prevented from passing through a specific portion of the filter medium 9 in a concentrated manner, and as a result, the processing capacity of the filter 1 is lowered, the filter medium 9 is clogged early, and the filter layer It is possible to prevent the change of shape.

Therefore, the filter 1 having a high filtration rate, particularly the domestic filter 1 can exhibit stable filtration performance regardless of the change in the flow rate of the well water (raw water).

Moreover, the flange portion 17 has a simple structure in which an increase in the number of parts is suppressed because the shape of the inner peripheral side of the flange 4 is simply changed by utilizing the flange 4 attached to the end plate 3b. In addition, it does not hinder the work when replacing the filter media 9.

In the first embodiment, the flange 17 is formed on the flange 4 attached to the end plate 3b.
The same effect can be obtained by forming the flange portion 17 on the flange 4 attached to the same.

3 and 4 show a second embodiment of the present invention.

In this embodiment, the flange portion 17 is formed not on the flange 4 but on the gasket member 5 sandwiched between the flanges 4.

More specifically, as shown in FIG. 4, the annular gasket member 5 has, for example, an annular body 17b on the inner peripheral surface of which circumferentially formed strip plate portions 17a projecting inward at regular intervals. When the flange 4 of the end plate 3b and the flange 4 of the body 3a are combined with each other, a strip-shaped portion 17a is formed from the inner peripheral surfaces of the body 3a and the end plate 3b as shown in FIG. A plurality of flanges 17 are formed so as to project on the horizontal plane formed by the gasket member 5.

Such a collar portion 17 has the same effect as that described in the first embodiment. However, FIG. 3 and FIG.
In the above, the same parts as those in the first embodiment described above are designated by the same reference numerals and the description thereof is omitted.

In the above-described embodiment, the flange portion is provided on the inner peripheral portion of the flange or the inner peripheral portion of the gasket member. However, the present invention is not limited to this. It may be provided on the inner peripheral surface of the filter.

[0044]

As described above, according to the invention of claim 1, when the flow velocity of the raw water supplied is increased by the collar portion provided intermittently, the water flowing along the inner surface of the end wall remains as it is. The flow is divided into a flow toward the inner surface of the tubular portion and a flow dispersed in the center of the tubular portion, so that the fluid uniformly flows from each portion of the filter medium.

Therefore, the problem that the raw water concentrates and flows into a specific portion of the filter member is solved, the processing capacity of the filter is unnecessarily lowered, and the filter material is clogged early.
It is possible to prevent the shape of the layer of the filter medium from changing unnecessarily, and it is possible to exhibit stable filtration performance regardless of the change in the flow rate of the raw water. It is especially effective for household filters with high filtration speed.

According to the second and third aspects of the present invention, the collar part can be formed with a simple structure in which an increase in the number of parts is suppressed by utilizing the existing parts constituting the filter.

[Brief description of drawings]

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

FIG. 2A is a partially sectional front view showing the structure of a flange portion formed on a flange of an end plate. (B) is the bottom view.

FIG. 3 is a sectional view showing a filtration device according to a second embodiment of the present invention.

FIG. 4A is a cross-sectional view showing a structure of a collar portion formed on a gasket member. (B) is the bottom view.

FIG. 5 is a cross-sectional view for explaining the behavior of the water flow when the flow velocity of the raw water supplied to the conventional filter is high.

[Explanation of symbols]

1 ... Filter (accommodation container) 3a ... Body (cylindrical part) 3b ... End plate (end wall) 4 ... Flange 5 ... Gasket member 9 ... Filter material 12 ... Inflow piping 17 ... Tsubabe 18 ... Notch.

Claims (3)

[Claims] 1. A vertical tubular portion having a filter medium housed therein, and an upper end of the tubular portion facing the filter member is covered with a dish or a spherical end wall. A filter in which the raw water is supplied to the filter medium by letting out the raw water so as to hit the inner surface of the end wall, and an inner circumference of the filter between the upper surface of the contained filter medium and the end wall. A filtering device, which is provided so as to project at a predetermined interval along the circumferential direction on the surface and separates a water flow flowing into the inner surface of the tubular portion along the inner surface of the end wall. 2. The filter is configured such that the tubular portion and the end wall are removably connected to each other by flanges provided on the tubular portion and the end wall, respectively, and the collar portion is the The filtration device according to claim 1, wherein the filtration device is formed on the inner peripheral surface of the flange of at least one of the tubular portion and the end wall so as to project at a predetermined interval in the circumferential direction. 3. The filter is configured such that the tubular portion and the end wall are detachably connected to each other with an annular gasket member interposed therebetween, and the collar portion has an inner circumference of the gasket member. The filtration device according to claim 1, wherein the filtration device is formed so as to project at a predetermined interval along the circumferential direction on the surface.