JPH06205906A - Filter device - Google Patents

Abstract

PURPOSE:To effectively utilize the total filtration surface and to prevent contaminants from easily remaining in a prefiltration chamber after washing by giving turning flow to water before filtration along the inner peripheral surface of the prefiltration chamber and also internally installing a filter with the axial center of its circumferential surface being eccentric to the center of turning of the water before filtration. CONSTITUTION:Water before filtration is caused to flow in a prefiltration chamber 3 in a state of being given turning flow along the inner peripheral surface of the prefiltration chamber 3 and also a filter 2 whose peripheral surface 15 on the prefiltration chamber side is formed into a circumferential surface is internally installed with the axial center X of the circumferential surface being eccentric to the center of turning Y of the water before filtration. Consequently, the variation in the distribution of the inflow quantity of the water before filtration to the filter 2 along the peripheral surface 15 on the prefiltration chamber side is reduced to separate contaminants over the total filtration surface of the filter 2. The sectional area of a passage where the water before filtration is given turning flow is changed along the turning direction to generate the turbulent flow, allowing the contaminants to be given diffusional flow, thus reducing the accumulation of contaminants on the bottom part, etc., of the prefiltration chamber 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filtering device for filtering water in pools, bathtubs and the like to remove dirt such as hair, fibers and dirt contained in pre-filtration water. The filter is installed in the casing, and the casing is divided into a pre-filtration chamber that supplies pre-filtration water to the filter and a post-filtration chamber into which the filtered water that has passed through the filter flows, and from the post-filtration chamber side. The present invention relates to a filtration device in which a cleaning mechanism for supplying cleaning water to the pre-filtration chamber side to clean a filter is provided, and a drainage path capable of discharging the cleaning water flowing into the pre-filtration chamber side is connected to the pre-filtration chamber.

[0002]

2. Description of the Related Art The above-mentioned filtration device cleans a filter by supplying washing water from the post-filtration chamber side to the pre-filtration chamber side so that dirt attached to the pre-filtration chamber side of the filter can be easily removed from the filter. In addition to providing a cleaning mechanism for cleaning, the drainage channel capable of discharging the cleaning water flowing into the pre-filtration chamber side is connected to the pre-filtration chamber so that the removed dirt can be discharged together with the cleaning water. As shown in FIG. 10, a filtering device in which a flat filter 02 having a large number of pores formed in a casing 01 is installed and the casing 01 is divided into a pre-filtration chamber 03 and a post-filtration chamber 04 is proposed. Has been done.

[0003]

According to the above-mentioned prior art, since the filter 02 which is divided into the pre-filtration chamber 03 and the post-filtration chamber 04 is flat, the filtration area is small and the filter 02 is filth. It has a drawback that it is easily clogged at an early stage.
In order to solve this drawback, for example, Japanese Utility Model Publication No. 61-197.
It is conceivable to install a basket-shaped filter having a large filtration area as described in Japanese Patent Publication No. 71 instead of a flat-plate filter, but in this case, the filter circumference of the flow velocity of the pre-filtration water flowing into the filter is considered. The distribution along the surface is non-uniform, and the flow velocity becomes faster in the filter part closer to the inflow position of the pre-filtration water into the pre-filtration chamber, and the inflow amount of pre-filtration water in the filter part having a higher flow velocity increases. However, there is a drawback that the dirt adheres unevenly to the filter portion having a high flow rate and the entire filtration surface of the filter cannot be utilized efficiently. or,
When the flow velocity of pre-filtering water flowing into the filter is slow, dirt easily accumulates near the filter part.If this accumulated dirt adheres to the wall surface of the pre-filtration chamber, etc. Such accumulated filth cannot be washed away, and the filth tends to remain in the chamber before filtration even after the filter is washed. The present invention has been made in view of the above circumstances, and by devising the flow form of pre-filtration water in the pre-filtration chamber, the entire filtration surface is efficiently utilized in a state where the filter is difficult to be clogged early. It is an object of the present invention to provide a filter device that can be used and that does not allow dirt to easily remain in the chamber before filtration after washing the filter.

[0004]

A characteristic configuration of the present invention for achieving the above object is to provide a casing with a basket-shaped filter, and the casing has a pre-filtration chamber for supplying pre-filtration water to the filter. It is divided into a post-filtration chamber into which filtered water that has passed through the filter flows, and a cleaning mechanism is provided for supplying cleaning water from the post-filtration chamber side to the pre-filtration chamber side to wash the filter. A filtration device in which a drainage channel capable of discharging the washing water flowing into the pre-filtration chamber side is connected to the pre-filtration chamber, wherein the pre-filtration water is swirled along the inner peripheral surface of the pre-filtration chamber. While being provided with an inflow mechanism for flowing into the pre-filtration chamber in a flowing state, the pre-filtration chamber side peripheral surface of the filter is formed into a circumferential surface, and the filter has the axial center of the circumferential surface as described above. Filtration by inflow mechanism While for eccentric with respect to the pivot center of the water, in that it is furnished in the casing. A peripheral surface of the filter on the side of the pre-filtration chamber may be formed in a shape protruding toward an upper end side above a bottom surface of the pre-filtration chamber, and the drainage channel may be connected near the bottom surface.

[0005]

[Function] By incorporating a basket-like filter in the casing and partitioning it into a pre-filtration chamber and a post-filtration chamber, the filtration area of the filter is increased, and the filter is prevented from being clogged early. Since an inflow mechanism for injecting pre-filtration water into the pre-filtration chamber in a state of swirling along the inner peripheral surface of the pre-filtration chamber is provided, and the pre-filtration chamber side peripheral surface of the filter is formed as a circumferential surface. , The pre-filtration water swirls along the pre-filtration chamber side peripheral surface of the filter, and the inflow condition of the pre-filtration water that is about to flow into the filter is adjusted to substantially the same condition along the pre-filtration chamber side peripheral surface, As a result of less fluctuation in the distribution of the flow velocity of pre-filtration water flowing into the filter along the peripheral surface of the pre-filtration chamber, the flow rate of the pre-filtration water flowing into the filter along the peripheral surface of the pre-filtration chamber is reduced. The fluctuation of the distribution is reduced,
The dirt is evenly separated from the filtered water over the entire filtering surface of the filter. Further, since the axial center of the circumferential surface forming the peripheral surface of the pre-filtration chamber of the filter is eccentric with respect to the swirl center of the pre-filtration water by the inflow mechanism, the filter is installed in the casing, The cross-sectional area of the flow path in which the pre-filtration water should swirl changes along the swirl direction, and due to this change in the cross-sectional area of the flow path, a turbulent flow in a direction intersecting with the swirl direction occurs, As a result of diffusive flow of the filth that tries to stay at the bottom of the pre-filtration chamber or a place where the flow velocity is slow, the amount of filth deposited on the bottom of the pre-filtration chamber decreases, and even if the amount of filth deposited on the filter increases Also, by cleaning the filter by the cleaning mechanism, the dirt attached to the filter can be washed out and discharged only by supplying and discharging the fluid. The pre-filtration chamber side peripheral surface of the filter is formed in such a shape that the upper end side protrudes above the bottom surface of the pre-filtration chamber, and when the drainage channel is connected near the bottom surface, when cleaning the filter, It is easy for the dirt attached to the filter to drop on the bottom surface of the pre-filtration chamber by its own weight and to be easily discharged together with the cleaning water.

[0006]

As a result, it is possible to efficiently utilize the entire filtration surface of the filter in a state in which it is difficult for the filter to be clogged early, and moreover, it is difficult for dirt to remain in the chamber before filtration after washing the filter, and therefore the filter is taken out from the casing. It can be used for a long period of time without the hassle of cleaning and cleaning the inner bottom surface of the casing. Moreover, in the filtering device of the second aspect of the present invention, the dropped dirt can be efficiently discharged from the drainage channel.

[0007]

【Example】

[First Embodiment] FIG. 6 shows a pool water circulation filtration device in which pool water sucked from the bottom of pool A is filtered by a filtration device B to remove dust (dirt) such as hair and fibers and then returned to pool A. The piping system diagram is shown, and the pool water sucked by the drive of the pump P passes through the pipe C and is used as pre-filtration water as a filtering device B.
The filtered water, which has been supplied to the pump and has removed dust, is discharged from the pump P to the return passage E via the pipe D and is returned to the pool A. The filtering device B is shown in FIGS.
As shown in, the height is about 645 mm and the inner diameter is about 500 m.
m cylindrical casing 1 with an upper diameter of about 340 m
m, the bottom diameter is about 240 mm, and the height is about 420 mm. The basket-shaped filter 2 is installed inside, and the bottom side of the casing 1 is in the pre-filtration chamber 3 that supplies pre-filtration water to the filter 2, and the top side of the casing 1 is the filter 2. It is divided into the post-filtration chamber 4 into which the filtered water that has passed through is flowed, and a cleaning mechanism 5 for injecting cleaning water from the post-filtration chamber 4 side to the pre-filtration chamber 3 side to clean the filter 2 is provided. A drainage pipe 6 capable of discharging the cleaning water flowing into the pre-filtration chamber 3 side together with dust adhering to the filter 2 is connected to the pre-filtration chamber 3.

The casing 1 is provided with a cylindrical container 8 having a circular horizontal cross section, and a lid 9 which can swing and open an upper opening of the cylindrical container 8, and the lid 9 sandwiches a packing. The inflow connection pipe 11 is fixed to the flange of the cylindrical container 8 with the eyebolt 10 and is connected to the pipe C from the pool A by a flange.
Of the bottom plate 7 of the cylindrical container 8 constituting the pre-filtration chamber 3 is equipped with a 50 A drainage pipe 12 which is attached in a state of penetrating the peripheral wall of the pre-filtration chamber 3 and enters the pre-filtration chamber 3. It is connected in an open state. The basket-shaped filter 2 is formed in a basket shape of a downward truncated cone shape with an upward opening in which a filtering net 13 having a large number of pores of about 60 mesh is attached along the outer circumference of a circular bottom plate 14. The cross section of the pre-filtration chamber side peripheral surface 15 is formed into a circular circumferential surface, and the bottom plate 7 of the cylindrical container 8 is formed.
A connection pipe 16 for outflow, which is attached by penetrating through, is connected in a state of opening at a position eccentric from the center of the circular bottom plate 14, and a pipe line D to the pump P is connected to the connection pipe 16 for outflow.
Is flanged. In the cleaning mechanism 5, a straight pipe-shaped nozzle 18 having a large number of blowing holes is formed in a cleaning pipe 17 which penetrates a peripheral wall of a cylindrical container 8 and protrudes toward a post-filtration chamber 4 side. A pipe 19 that is concentrically connected to X and that supplies high-pressure cleaning water to the nozzle 18 is connected to the cleaning pipe 17.

The inflow connection pipe 11 connected to the pipe C from the pool A has a discharge port 20 at the cylindrical container 8
Between the inner peripheral surface 21 and the pre-filtration chamber side peripheral surface 15 of the filter 2 is installed substantially horizontally in a state of penetrating the peripheral wall of the cylindrical container 8 obliquely, and pre-filtration water is supplied to the pre-filtration chamber 3 The inflow mechanism 22 for horizontally inflowing into the pre-filtration chamber 3 in a state of swirling and flowing along the inner peripheral surface 21 of the filter 2 is formed, and the filter 2 forms a circle forming the pre-filtration chamber side peripheral surface 15 thereof. In the state where the axis X of the peripheral surface is eccentric with respect to the swirl center of the pre-filtration water by the inflow mechanism 22, that is, the central axis Y of the cylindrical container 8, and in a state parallel to each other, It is fixed to the casing 1 by screwing it to the collar 23 provided on the peripheral wall.

Then, by driving the pump P, the filtered water in the post-filtration chamber 4 is returned to the pool A via the pipe D, and at the same time, the pre-filtration water is supplied to the pre-filtration chamber 3 via the pipe C. However, the pre-filtration water supplied to the pre-filtration chamber 3 is
The inflow condition of the pre-filtration water that swirls and flows in the annular flow path F formed between the inner peripheral surface 21 of the filter 2 and the pre-filtration chamber side peripheral surface 15 of the filter 2 to flow into the filter 2 is the pre-filtration chamber. As a result of reducing the distribution variation of the flow velocity of the pre-filtration water flowing into the filter 2 along the pre-filtration chamber side circumferential surface 15 under substantially the same condition along the side circumferential surface 15, the pre-filtration water is reduced. The variation of the distribution of the inflow amount of the filter 2 along the peripheral surface 15 on the pre-filtering chamber side is reduced, and the dust is evenly attached to the entire filter surface of the filter 2, so that the filter 2 is early. The entire filtration surface can be used efficiently with less clogging.

Further, in a state where the axial center X of the circumferential surface forming the pre-filtration chamber side peripheral surface 15 of the filter 2 is eccentric with respect to the swirl center Y of the pre-filtration water by the inflow mechanism 22. Since the pre-filtered water is swirled, the cross-sectional area of the flow channel F changes along the swirling direction, and due to the change in the cross-sectional area of the flow channel, swirling is performed as shown in FIG. A flow in the direction H that crosses the direction G in the up and down direction between the inner peripheral surface 3 of the pre-filtration chamber 3 and the pre-filtration chamber side peripheral surface 15 of the filter 2 and the circular bottom plate of the filter 2. 14 and the bottom plate 7 of the cylindrical container 8 generate a turbulent flow in the direction J that crosses in the radial direction, and the dust that tends to stay in the pre-filtration chamber 3 is diffused and flows. The amount of attached dust increases, and conversely, the amount of dust that tends to stay in the pre-filtration chamber 3 decreases, Increases the amount of dust washed off by cleaning the filter 2 by Kiyoshi mechanism 5, dust after the filter cleaning is less likely to remain in the pre-filtration chamber 3.

In the cleaning by the cleaning mechanism 5, the driving of the pump P is stopped and then the valve V1 of the conduit C is closed to stop the inflow of pre-filtering water into the pre-filtering chamber 3, and the air vent hole 24 and drainage. After the valve V2 of the pipe line 6 is opened to drain the water in the casing 1 through the drainage pipe line 6, as shown in FIG. 2, the valve V3 is opened to remove the high-pressure washing water supplied from the pipe 19. Cleaning is performed by vigorously ejecting horizontally from the blowout hole of the nozzle 18 toward the filter 2, and when the cleaning water passes through the filter 2 and flows into the pre-filtration chamber 3 side,
Dust adhering to the filter 2 is washed away to the side of the pre-filtration chamber 3 and discharged from the drainage pipe 6 together with the washing water. In addition, since the pre-filtering chamber side peripheral surface 15 of the filter 2 is formed in a shape protruding toward the upper side of the bottom plate 7 of the pre-filtering chamber 3, dust attached to the filter 2 together with the washing water is filtered in the pre-filtering chamber. 3 easily falls on the bottom plate 7 by itself, and the dust that has fallen can be efficiently discharged from the drain pipe 12 together with the wash water.

The above-mentioned pool water circulation filtration device is installed in pool A having an average depth of 1.2 m, a length of 25 m, 6 courses, and an average number of users of about 300 per day, with a throughput of 70 m ³ / hr. The filtration is stopped for 5 minutes and the cleaning mechanism 5
After washing with 5 liters of washing water, the operation of continuing the filtration was performed, and when the inside was inspected 3 months later, about 10 soft dust (mainly hair) adhered to the filter 2 and the pre-filtration chamber 3 There were two scratch tapes left on the bottom of each, and both were in a situation that they would be removed by repeating washing in the future. For comparison, a conventional filtration device shown in FIG. 10 is provided in place of the filtration device shown in this embodiment,
When a similar operation was performed, about 5.8 m ³ of washing water was required each time for washing the filter 02 by flowing washing water from the post-filtration chamber 04 side to the pre-filtration chamber 03 side for 5 minutes every day. It was

[Second Embodiment] FIG. 7 shows a filter in which an upward truncated-cone trapezoidal cage filter 2 having a downward opening is fixed to a collar 23, and the outer peripheral side of the filter 2 is formed in a post-filtration chamber 4. The apparatus is shown in which the inner peripheral surface side of the filter 2 is formed on the peripheral surface 15 of the pre-filtration chamber of the filter 2, and the connection pipe 11 for inflow is attached so as to open below the filter 2 for outflow. The connection pipe 16 is connected to the peripheral wall of the cylindrical container 8 in an open state. The cleaning mechanism 5 has a plurality of cleaning pipes 17 penetrating the peripheral wall of the cylindrical container 8 and protruding toward the post-filtration chamber 4 side, and the nozzles 1.
8 are connected. Other configurations are similar to those of the first embodiment.

[Third Embodiment] FIG. 8 shows that a downward frusto-conical trapezoidal filter 2 having a downward opening is fixed to the collar 23, and a pre-filtration chamber 3 is formed on the top side of the casing 1.
Shown is a filtering device B in which a post-filtration chamber 4 is formed on the bottom side of the casing 1, the outer peripheral surface side of the filter 2 is formed on the pre-filtration chamber side peripheral surface 15 of the filter 2, and the drainage pipe 12 is of the pre-filtration chamber 3. The inflow connection pipe 11 is attached to the flange 23 forming the bottom portion in an open state, and the inflow connection pipe 11 is attached to the upper side of the flange 23, and the outflow connection pipe 16 is a bottom plate of the cylindrical container 8. It is connected to the central position of 7 in an open state. The cleaning mechanism 5 is configured by connecting a nozzle 18 to a cleaning pipe 17 penetrating the peripheral wall of the cylindrical container 8 and protruding toward the post-filtration chamber 4 side, and a nozzle 18 concentrically with the axis X of the filter 2. . Other configurations are similar to those of the first embodiment.

[Fourth Embodiment] FIG. 9 shows that a basket-shaped filter 2 having an upward truncated cone shape that is open upward is fixed to a collar 23, and a pre-filtration chamber 3 is formed on the top side of a casing 1.
Shown is a filtering device B in which a post-filtration chamber 4 is formed on the bottom side of the casing 1, the inner peripheral surface side of the filter 2 is formed on the pre-filtration chamber side peripheral surface 15 of the filter 2, and the drain pipe 12 is the bottom plate of the filter 2. 14, the inflow connection pipe 11 is attached so as to be opened above the filter 2, and the outflow connection pipe 16 is opened at the center position of the bottom plate 7 of the cylindrical container 8. Connected in a state. The cleaning mechanism 5 is configured by connecting a nozzle 18 to a large number of cleaning pipes 17 penetrating the peripheral wall of the cylindrical container 8 and protruding toward the post-filtration chamber 4 side. Other configurations are similar to those of the first embodiment.

[Other Embodiments] The volume of the post-filtration chamber may be made sufficiently large so that the post-filtration water is stored in the post-filtration chamber. For washing the filter, the washing water may be blown out from the nozzle without draining the water in the casing, and the dust may be discharged from the drainage pipe together with the water in the casing.

It should be noted that reference numerals are given in the claims for convenience of comparison with the drawings, but the present invention is not limited to the configurations of the accompanying drawings by the entry.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view of a filtration device.

FIG. 2 is a sectional side view illustrating a cleaning operation by a cleaning mechanism.

FIG. 3 is a plan view of a filtration device.

FIG. 4 is a horizontal sectional side view of the filtration device.

FIG. 5 is an explanatory diagram of operation

[Figure 6] Piping system diagram

FIG. 7 is a vertical sectional side view showing a second embodiment.

FIG. 8 is a vertical sectional side view showing a third embodiment.

FIG. 9 is a vertical sectional side view showing a fourth embodiment.

FIG. 10 is an explanatory diagram of a conventional technique.

[Explanation of symbols]

 1 Casing 2 Filter 3 Pre-filtration chamber 4 Post-filtration chamber 5 Cleaning mechanism 7 Bottom 12 Drainage channel 15 Pre-filtration chamber side peripheral surface 21 Inner peripheral surface 22 Inflow mechanism X Shaft core Y Swing center

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location B01D 24/46 29/62 7112-4D B01D 29/38 A

Claims (2)

[Claims] 1. A pre-filtration chamber (3) for supplying pre-filtration water to the filter (2) and a filter (2) in which a basket-shaped filter (2) is installed in the casing (1). It is divided into a post-filtration chamber (4) into which filtered water that has passed through 2) flows, and washing water is supplied from the post-filtration chamber (4) side to the pre-filtration chamber (3) side. A cleaning mechanism (5) for cleaning the filter (2) is provided, and a drainage channel (12) capable of discharging the cleaning water flowing into the pre-filtration chamber (3) side is connected to the pre-filtration chamber (3). The inflow mechanism (22) for introducing pre-filtration water into the pre-filtration chamber (3) while swirling the pre-filtration water along the inner peripheral surface (21) of the pre-filtration chamber (3). The peripheral surface (15) of the filter (2), which is provided on the chamber side before filtration, is a circumferential surface. The filter (2) is formed on the axial surface (X) of the circumferential surface of the inflow mechanism (2).
The filtration device installed in the casing (1) in a state of being eccentric with respect to the swirl center (Y) of the pre-filtration water according to 2). 2. The peripheral surface (15) of the filter (2) on the pre-filtration chamber side is formed in a shape protruding toward the upper side of the bottom surface (7) of the pre-filtration chamber (3), and the drainage channel (15) is formed. 1
2. The filtering device according to claim 1, wherein 2) is connected near the bottom surface (7).