JP2005177690A - Filtration apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a filtration apparatus which can be installed without requiring work such as demolition of an overflow dam already constructed, effectively prevent foreign matters from unspecified contamination sources at rainy days from flowing into rivers etc. and improve the landscape of rivers and surrounding environment through the removal of the foreign matters. <P>SOLUTION: The filtration apparatus is composed of a screw 23 of scraping the foreign matters, a screen 22 of discharging treated water and a control panel 17 of controlling the screw 23. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a filtration device that is applied to efficiently remove contaminants and the like in sewage.

  In general, in sewers, contaminants from non-specific pollution sources flow in the rain, and sewage that cannot be collected in the sewage treatment plant is discharged directly into the river along with the sewage from the rainwater discharge chamber. There is a situation that damages the scenery of the river and the surrounding environment due to the impurities. The removal of impurities in the sewage is generally performed using a bar screen or the like.

FIG. 12 is a schematic longitudinal sectional front view showing a rainwater discharge chamber provided with a conventional bar screen, and FIG. 13 is a schematic longitudinal sectional side view of FIG.
12 and 13, 1 is a rainwater discharge chamber, 2 is an existing overflow weir that partitions the rainwater discharge chamber 1 into an upstream side and a downstream side, and this overflow weir 2 is indicated by hatching in FIG. After the suspension work, a bar screen 3 for capturing foreign substances is installed on the overflow weir 2. As described above, the bar screen 3 installed on the upper end of the overflow weir 2 through the existing overflow weir 2 is unitized with a plurality of elongated flat plate bars adjacent in the vertical direction at narrow parallel intervals. Therefore, a scraping rake (not shown) is arranged between the narrow bar screens 3. 4 is a hydraulic unit for driving the scraping rake, and 5 is a lead-in utility pole for powering the hydraulic unit 4.

Next, the operation of the conventional example will be described.
The contaminants in the sewage (rain water) that flowed into the upstream side of the rain discharge chamber 1 from the inflow pipe trap are captured by the bar screen 3 on the overflow weir 2 and then returned to the upstream side by the scraping rake. The upstream sewage containing contaminants is sent from the interceptor pipe to the treatment plant, while the sewage that has passed through the bar screen 3 is discharged from the discharge pipe to a river or the like.

  The above prior art is a technique generally known to those skilled in the art, and does not relate to a known literature invention.

When the bar screen 3 is used for removing contaminants as in the prior art, there are the following problems.
(1) When the bar screen 3 is installed in the rainwater discharge chamber 1, it is often difficult to carry the bar screen 3 from the entrance / exit of the rainwater discharge chamber 1.
(2) Generally, in order to treat large volumes of sewage, the loss head is large, and there is a concern of overflow from manholes due to rising water levels. In order to reduce the loss head, the existing overflow weir 2 Although civil engineering work such as hanging is necessary, the civil engineering work is a large-scale construction, resulting in a large construction cost for installing the bar screen.
(3) Since the scraping rake is disposed between the narrow screens of the bar screen 3, the bar screen 3 is likely to be deformed due to the biting of foreign matters, resulting in a failure.
(4) Since the scraping rake is hydraulically driven, the hydraulic unit 4 as the driving means is installed on a sidewalk or the like, which deteriorates the aesthetic environment and obstructs traffic.

  The present invention has been made to solve the above-described problems, and can be installed without requiring any construction such as hanging an existing overflow overflow weir. An object of the present invention is to provide a filtration device that can effectively prevent the inflow of foreign substances into rivers and the like, and can improve the landscape of rivers and surrounding environments by removing foreign substances and slimming ground facilities.

  The filtration device according to the present invention is characterized by comprising a screw for scraping impurities, a screen for discharging treated water, and a control panel for controlling the screw.

  The filtration device according to the present invention is installed in a rainwater discharge chamber.

  The filtration device according to the present invention is a filtration device comprising a screw that scrapes impurities, a screen that discharges treated water, and a control panel that controls the screw, and the control panel is provided in a human hole or a rain discharge chamber. It is characterized by that.

  The filtration device according to the present invention is a filtration device comprising a screw that scrapes impurities, a screen that discharges treated water, and a control panel that controls the screw, wherein the screw is a ribbon screw. .

  The filtration device according to the present invention is a filtration device comprising a screw that scrapes impurities, a screen that discharges treated water, and a control panel that controls the screw, wherein the screw is provided with a brush. .

According to this invention, the following various excellent effects can be obtained.
(1) It is possible to prevent the inflow of contaminants from non-specific pollution sources during rainy weather into the river, and to improve the landscape of the river and surrounding environment by removing the contaminants.
(2) Since the main components such as the screw, the screen, the weir plate, the motor, and the support material can be divided individually, the carry-in into the rainwater discharge chamber can be easily carried in from the rainwater discharge chamber entrance / exit. Moreover, since the screen itself and the screw can be further divided, if the screw diameter is smaller than the rainwater discharge chamber entrance / exit, it can be carried in from the rainwater discharge chamber entrance / exit regardless of the length of the apparatus. Therefore, the construction cost can be reduced without requiring a large-scale civil engineering work for installing the filtration device. Similarly, when installing in a manhole, it is easy to carry in and install.
(3) The filtration device according to the present invention has a concern that the head loss becomes large to treat large volumes of sewage by adjusting the position of the screen (horizontal adjustment), or there is a concern of overflow from the rainwater discharge chamber entrance / exit due to rising water level. lost. Therefore, it is not necessary to construct an existing overflow weir to reduce the head loss. That is, since the operation is performed at a position equal to or lower than the inflow water level in rainy weather, there is no influence such as an increase in the water level of the upstream pipe from the installation position of the apparatus of the present invention. For installation, it is sufficient that there is a space behind the existing overflow weir, and there is no need to adjust the height of the overflow overflow weir.
(4) When a ribbon screw without a shaft is used, a large amount of foreign matter can be prevented from being used, and the amount of treated water can be further increased.
(5) Since no foreign matter is caught in the screw, it becomes difficult to break down.
(6) Since the dust is scraped by the screw having the brush attached to the outer peripheral edge portion of the screw, the screen can be prevented from being clogged by the effect of the screen cleaning.
(7) Only a watt hour meter is attached to the steel pipe lead-in column for residential use, and the ground part has a compact appearance.
(8) Since the drive device uses a waterproof electric motor and the control panel is installed in the rainwater discharge chamber, there is an effect that the aesthetic environment is not deteriorated and the traffic is not obstructed.
(9) Since the waterproof control panel can be installed in the rainwater discharge chamber, the surrounding aesthetics are not impaired.
(10) The control panel is installed in a discharge chamber whole installation method in which a main switch other than the watt hour meter, a switch, a sequencer, and an emergency call device are placed in a waterproof control panel and installed in the rainwater discharge chamber. For the convenience of the installation, the main switch, a partial discharge chamber installation method in which the switch is installed in a steel pipe lead-in column with a watt hour meter, if there is a place on the ground, the main switch on the waterproof control panel, It is also possible to use a buried ground method with a switch, sequencer, and emergency call device. As a result, the ground equipment can be made slim.
(11) The cost is that the power is only an electric motor, no manhole modification is required when installing the filtration device, the operation is automatic, and the trapped contaminants are automatically intercepted. Therefore, maintenance management is not required, for example, no residue processing work is required, and the cost is reduced.
(12) Maintenance management is also easy because only the electrical system may be managed.
(13) Using a screw to remove contaminants, scrape the contaminants scraped along the flow direction with a scraper machine at the end of the screen, return to the upstream side of the overflow weir, and pour it into the interceptor tube, etc. Because it removes foreign matters, it is easy to maintain and manage, such as eliminating the need for waste disposal. Further, by providing the cam engaging member and the discharge assisting plate, it is possible to more reliably remove impurities. Further, by providing the scraper with a hinge, it is possible to improve the splashing of the foreign matter and to further reduce the trouble that the foreign matter is clogged with the scraper.

Hereinafter, an embodiment of the present invention will be described.
Embodiment 1 FIG.
FIG. 1 is a cutaway perspective view showing a rainwater discharge chamber provided with a filtration device according to Embodiment 1 of the present invention, and FIG. 2 is a schematic sectional view of FIG.
In the figure, the rainwater discharge chamber 10 is partitioned into an upstream side 10A and a downstream side 10B by an existing overflow weir 11 and has a rainwater discharge chamber entrance 10C. The upstream side 10A of the rainwater discharge chamber 10 is connected to the inflow pipes 12 and 13 and the intercepting pipe 14 and the downstream side 10B is connected to the discharge pipe 15. A filtration device 21 is installed in the overflow weir 11 of the rainwater discharge chamber 10, and the detailed structure of the filtration device 21 will be described later. Further, a waterproof terminal box 17 having a built-in water level gauge 16 and a control panel (not shown) for controlling the driving device 29 is installed on the inner wall surface of the rainwater discharge chamber 10. In addition, a steel pipe lead-in column 18 for residential use is installed on the outer wall of the rainwater discharge chamber 10, and a watt hour meter 19 and a switch 20 are installed in this.

Next, the detailed structure of the filtration device 21 will be described.
3 is an enlarged plan view showing the filtration device in FIG. 1, FIG. 4 is a partially cutaway front view of FIG. 3, FIG. 5 is a sectional view of FIG. 4, and FIG. It is.
The filtration device 21 is installed horizontally along the downstream side wall surface of the overflow weir 11 to capture the contaminants and discharge the treated water. The filtration device 21 is assembled in the screen 22 to remove the contaminants in the axial direction. A screw 23 that scrapes toward one end side and a scraper machine 30 that returns scraping dust to the upstream side 10A of the overflow weir 11 in conjunction with the screw shaft 23a of the screw 23 are provided.

  More specifically, the screen 22 is made of a punching metal having a semicircular cross section. The water level of the screen 22 is set to a position that is equal to or lower than the dynamic water level in the pipe, that is, a position that is equal to or lower than the inflow water level during rainy weather. This is a configuration in which the screen 22 is installed in the overflow weir 11 of the rainwater discharge chamber 10 so that the height of the upper end of the screen 22 is equal to or lower than the inflow water level on the upstream side 10A of the rainwater discharge chamber 10. . Further, the screen 22 may be provided with a space behind (downstream side) the overflow weir 11 and it is not necessary to adjust the height of the overflow weir 11.

  The diameter of the screen 22 can arbitrarily correspond to 300, 500, 700 mm, etc., and the length can also arbitrarily correspond to the length of the weir such as 1, 1.5, 3 m. In addition, the punching holes of the screen 22 have a staggered arrangement of 3 mm hole diameter, 4.5 mm pitch, 4 mm hole diameter, 5.5 mm pitch, 6 mm hole diameter, and 8 mm pitch. Is assured, the hole size and pitch are free and may be parallel and parallel.

  As shown in FIG. 6, a resin (nylon) brush 24 is integrally attached to the outer peripheral edge of the screw 23 by a brush stopper 25 and a bolt / nut 26. The brush 24 is slidably contacted with the screen 22 when the screw 23 is rotated to scrape impurities and prevent the screen 22 from being deformed or clogged by the impurities. In addition, on the transfer terminal end side of the screw 23, an end portion of the screen 22 is provided with an aggregation portion 27 for collecting impurities transferred in the axial direction of the screw 23. Further, a discharge assisting plate 28 is disposed on the screen 22 side in the vicinity of the aggregation portion 27. The discharge assisting plate 28 is for discharging more smoothly the foreign matter scraped by the scraper 31 described later.

Further, a chute (not shown) is attached to the end of the screen 22 to remove impurities by dropping them into the chute. This is used when the captured contaminants are to be transferred to a place away from the screen 22 or when it is desired to carry out and store on the site.
As the drive device 29 that rotationally drives the screw 23, a submerged waterproof motor with a reduction gear is used.

On the other hand, the scraper machine 30 is coupled to a scraper 31 disposed above the collecting portion 27 and supported by a shaft P so as to be pivotable in the vertical direction, and a wall on the phase end side of the screw 23 to be connected to the scraper. It consists of an eccentric cam 32 that springs up 31. The eccentric cam 32 is formed of a cam plate that is integrated with the screw shaft 23 a and is continuous with the end of the screw 23 on the transfer terminal side. The eccentric cam 32 is not limited to the plate-shaped one as described above, and may be another block-shaped one. In short, it is only necessary to have durability capable of supporting the movement of the scraper 31. .
Here, the scraper 31 is provided with a cam engaging member 31 a that protrudes downward and contacts the eccentric cam 32.

FIG. 8 is a schematic sectional view of the filtration device of the present invention (another form of the scraper 31). The same parts as those in FIG.
In the second embodiment, the front end sides of the both side walls of the scraper 31 and the front end side of the cam engaging member 31a in the first embodiment are respectively deleted, and the front end side bottom plate portion 31b of the scraper 31 is swung without both side walls. It is separated as a bottom plate portion 31b, and this swinging bottom plate portion 31b is connected to the tip of the main body side bottom plate portion of the scraper 31 so as to freely swing in the vertical direction by a hinge 31c. Here, as the hinge 31c, a hinge that holds the swinging bottom plate portion 31b in a position that is flush with the main body side bottom plate portion of the scraper 31 and does not rotate downward from the holding position is applied.

Thus, by making the tip side bottom plate portion of the scraper 31 the swinging bottom plate portion 31b having no both side walls, it is possible to improve the splashing of impurities between the discharge auxiliary plate 28 and the discharge auxiliary plate 28 and the scraper. There is an effect that it is possible to more surely prevent a trouble that a foreign object can be used between 31 and 31.
Note that the swinging bottom plate portion 31b can be forcibly raised by the eccentric cam 32 in advance of the main body side of the scraper 31.

  The filtration device 21 configured as described above is configured to be assembled and disassembled so that each of the screen 22, the screw 23, the scraper 31, and the drive device 29, which are the components, can be individually carried into the site.

Next, the operation will be described.
Sewage (rainwater or the like) that has flowed into the upstream side 10A of the rainwater discharge chamber 10 from the inflow pipes 12 and 13 is divided into a flow toward the interception pipe 14 and a flow beyond the overflow weir 11. The sewage that has passed over the overflow weir 11 flows into the filtering device 21, so that impurities in the sewage are captured by the screen 22. The foreign matter captured by the screen 22 is transferred in the axial direction by the screw 23 and collected in the collecting unit 27. The foreign matter gathered in the gathering unit 27 is scooped up every rotation of the screw shaft 23 a and is bounced back to the upstream side 10 </ b> A of the rainwater discharge chamber 10. That is, the eccentric cam 32 rotates integrally with the screw shaft 23a, and the cam engaging member 31a of the scraper 31 is in contact with the eccentric cam 32, so that the scraper 31 is interposed via the cam engaging member 31a. Is lifted by the eccentric cam 32 every rotation. FIG. 7 shows the related operation of the eccentric cam 32 and the scraper 31 at this time. As a result of the operation, the foreign substances collected and temporarily stored in the collecting unit 27 are lifted up by the scraper 31 and returned to the upstream side 10 </ b> A of the rainwater discharge chamber 10. The foreign substances returned to the upstream 10A of the rainwater discharge chamber 10 are sent to the treatment plant from the interceptor pipe 14 together with the dirty water. On the other hand, contaminants are captured and removed by the screen 22 and the sewage that has passed through the screen 22 is discharged from the discharge pipe pit 15 to a public waterway or the like.

  According to the first embodiment described above, a water-permeable screen 22 for capturing foreign substances disposed horizontally along the overflow weir 11 in the rain discharge chamber 10, and the drive device 29 assembled in the screen 22. And a screw 23 for transferring the foreign matter captured by the screen 22 to one end side in the axial direction, and a screw transfer end side by the screw 23 so as to be rotatable in the vertical direction in the vicinity thereof. A scraper 31, and an eccentric cam 32 is integrally provided on the screw shaft 23 a of the screw 23, and the scraper 31 is lifted up by the eccentric cam 32, so that the scraper 31 scoops up foreign matter and discharges rainwater. Since it is configured so as to return to the upstream side 10A of the chamber 10, there is no fear that the foreign material is bitten and deformed as in the conventional bar screen. Thus, the foreign matter captured by the screen 22 and transferred to one end in the axial direction by the screw 23 can be scooped up by the scraper 31 operated by the eccentric cam 32 and smoothly returned to the upstream side 10A of the rain discharge chamber 10. There is an effect.

  Further, according to the first embodiment, the screen 22, the screw 23, and the drive device 29, which are the main components of the filtration device 21, are configured to be assembled and disassembled. There is an effect that it can be carried into the rainwater discharge chamber 10 from the discharge chamber entrance 10C and can be carried in easily. In addition, the screen 22 and the screw 23 can be further divided. If the diameter of the screen 22 and the screw 23 is smaller than that of the rainwater outlet / inlet 10C, the length of the screen 22 and the screw 23 can be reduced. Regardless of the effect, the rainwater discharge chamber entrance / exit 10C can be carried in more easily. Furthermore, it is not only easy to install in the rainwater discharge chamber 10, but it is also easy to install it in a manhole (sewerage facility plan / design guideline and explanation 2001 version).

  Furthermore, the screen 22 is connected to the overflow weir 11 on the downstream side of the existing overflow weir 11 so as to be equal to or lower than the water level on the upstream side 10A of the rainwater discharge chamber 10 in rainy weather. It can be installed horizontally along the existing weir, so it can be installed directly on the existing overflow weir without the need for a large-scale overhang weir, which is essential when installing a conventional bar screen on the existing overflow weir. Therefore, there is an effect that the cost of civil engineering work can be reduced. Furthermore, since the loss head is not increased by the installation of the screen 22, it is possible to prevent the upstream water level from rising.

  Furthermore, according to Embodiment 1 described above, only the watt hour meter 19 and the switch 20 are attached to the residential steel pipe retracting small column 18 as a drive control system of the screw 23. Otherwise, a conventional hydraulic unit is installed. Since the screw 23 is rotationally driven only by a submerged waterproof electric motor (drive device 29) without being required, there is an effect that the drive device 29 becomes compact. In addition, since the waterproof terminal box 17 having a built-in waterproof control panel can be installed in the rainwater discharge chamber 10, there is an effect that the appearance of the surrounding environment is not impaired as in a conventional hydraulic unit.

As the water level meter 16 for control, any device that can measure the water level such as an ultrasonic water level meter in addition to the throw-in type water level meter may be used.
In addition, the control panel is installed in the spout chamber where the main switch, switch, sequencer, and emergency call device other than the electricity meter are placed in the waterproof control panel (waterproof terminal box 17) and installed in the rain spout chamber 10. By adopting the system, there is an effect that the ground equipment can be made slim. For the convenience of the installation, the main switch, a partial discharge chamber installation method in which the switch is installed in the steel pipe lead-in column 18 together with the watt hour meter, and when there is a place on the ground, the waterproof control panel has a main switch. It is also possible to adopt a ground burying system that embeds switches, sequencers, and emergency call devices. In either case, since only the electric system needs to be managed, maintenance management becomes easy. In addition, a filtration apparatus can also be operated from a ground part using a handy controller.
Furthermore, the cost is only the electric power consumption of the motor, no manhole modification work is required when installing the filtration device, and automatic operation is performed. Therefore, there is no need to carry out a residue processing operation, and no maintenance is required.

Embodiment 2. FIG.
FIG. 10 is an enlarged plan view showing the filtration device of the present invention in the case of a ribbon screw. The same parts as those in FIG.
In the second embodiment, the screw with a shaft in the first embodiment is changed to a ribbon screw without a shaft.
By doing so, it is possible to further prevent large impurities from being used, and the amount of processing can be further increased by the absence of a shaft. Here, the contaminants collected at the screw end are returned to the inflow side by the scraper, but any shape may be used as long as the contaminants can be returned.

Example 1.
The result of actually operating and processing the filtration device according to the above embodiment will be described below. In addition, the installation place of the filtration apparatus was a rainwater discharge chamber, and a control panel for controlling the screw was also provided in the rainwater discharge chamber. Moreover, the screw which attached the brush was used for the outer periphery part of the screw.
The screen diameter was 500 mm, the screen length (punching portion) was 2.3 m, the punching hole diameter was 6 mm, the maximum processing capacity was about 0.69 m ³ / sec (maximum overflow rate 0.96 m ³ / sec), and an ultrasonic water level meter was used. The operation was performed with an inflow water amount of 0.07 to 0.10 (m ³ / sec), a weir height 11a of 0.3 m, and a weir length 11b of 4.0 m. The total rainfall from July to February of the following year was 852 mm, the number of overflows was 34 times, and automatic operation was carried out for a total of 67 hours and 39 minutes. It was able to drive smoothly without any damage.

  When the contaminant components during the operation (average value of 7 out of 34 overflow times, sampling amount is 15 L) were compared before and after passing through the screen, the results shown in the table of FIG. 9 were obtained. About 95% of impurities in the inflowing sewage could be removed. Others include gravel and gravel.

Example 2
The result of comparing the filtration device using the conventional bar screen and the filtration device using the screen of the present invention will be described below.
The filtration device of the present invention was implemented with a screen 22 having a hole diameter of 4 mm and an aperture ratio of 48%. The conventional bar screen was implemented with a mesh width of 4 mm and an aperture efficiency of 50%. The target water was Shimizu.
When the weir length of the filtration device of the present invention was changed to 1, 1.5, 2, 2.5, 3 m and the diameter of the screw 23 was 30, 50, 70 cm, as shown in the table of FIG. for example, if the screw diameter in weir length 2m is 30 cm, 50 cm, of 70cm, head losses are 14.5cm, 22.2cm, a 26.9Cm, processing water is 0.196m ³ /sec,0.371m ³ / sec 0.495 m ³ / sec. In the conventional filtration device, for example, when the bar screen weir length is 2 m and the screen nominal height is 30 cm, the loss head is 42.6 cm and the amount of treated water is 0.294 m ³ / sec. The screen nominal height of 30 cm corresponds to a screw diameter of 50 cm.
For this reason, the loss head of the present invention was less than half that of the conventional example even when the aperture ratio was almost the same between the screen of the present invention and the conventional bar screen. Further, even if the weir length was changed and the amount of treated water was changed, in the case of the present invention, the loss head was able to be operated lower than the conventional bar screen. This clearly shows that the filtration device of the present invention has little influence on the upstream side.

  In each of the above embodiments, the case where the filtration device 21 is installed in the rainwater discharge chamber 10 has been described. However, the filtration device of the present invention can also be installed in a human hole, and in this case, the same effect can be obtained. It is. Further, the control panel (waterproof terminal box) 17 can also be installed in a human hole, and in this case, the same effect can be obtained.

Example 3
The result of actually operating and processing the filtration device according to the second embodiment will be described below. In addition, the installation place of the filtration apparatus was a rainwater discharge chamber, and a control panel for controlling the screw was also provided in the rainwater discharge chamber. In the second embodiment, the screw is a ribbon screw.
Screen diameter φ500 mm, screen length (punching part) 2.3 m, punching hole diameter 6 mm, maximum processing capacity 1.38 m ³ / sec (maximum overflow rate 1.92 m ³ / sec), an ultrasonic water level meter was used. When automatic operation was performed with an inflow of water of 0.14 to 0.2 (m ³ / sec), a weir height 11a of 0.3 m, and a weir length 11b of 4.0 m, the filtration device operated normally and was clogged with contaminants. It was able to operate smoothly without any wear or damage.
Even if the screw was changed to a ribbon screw, the removal rate of contaminants was about 94%, and almost the same treatment could be performed, and the large amount of contaminants could not be used, and the amount of treated water could be further increased.

It is a perspective view which fractures | ruptures and shows the rain water discharge chamber provided with the filtration apparatus by Embodiment 1 of this invention. It is a schematic sectional drawing of FIG. It is a top view which expands and shows the filtration apparatus in FIG. FIG. 4 is a partially cutaway front view of FIG. 3. FIG. 5 is a cross-sectional view of FIG. 4. It is an expanded sectional view of the brush attachment part of a screw. It is operation | movement explanatory drawing. It is a schematic sectional drawing which shows the filtration apparatus by Embodiment 1 of this invention. It is a table | surface which shows the result of having compared the contaminant component before the screen passage and after the passage. It is a top view which expands and shows the filtration apparatus of this invention in the case of a ribbon screw. 10 is a table showing the operation results of Example 2. It is a general | schematic longitudinal cross-sectional front view which shows the rain water discharge chamber in which the conventional bar screen was installed. It is a schematic vertical side view of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Rain water discharge chamber 10A Upstream side 10B Downstream side 10C Rain water discharge chamber entrance / exit 11 Overflow weir 11a Weir height 11b Weir length 12, 13 Inlet pipe rod 14 Concentration tube rod 15 Outlet tube rod 16 Throw-in type water level meter 17 Waterproof terminal box (control panel)
DESCRIPTION OF SYMBOLS 18 Residential steel pipe lead-in column 19 Electricity meter 20 Switch 21 Filter device 22 Screen 22a Fixing plate 23 Screw 23a Screw shaft 24 Brush 25 Brush stopper 26 Bolt and nut 27 Aggregation part 28 Discharge auxiliary plate 29 Drive device 30 Scraper machine 31 Scraper 31a Cam engaging member (scraper support plate)
31b Swing bottom plate portion 31c Hinge 32 Eccentric cam

Claims (5)

  A filtration apparatus comprising: a screw that scrapes impurities, a screen that discharges treated water, and a control panel that controls the screw.   The filtration apparatus according to claim 1, wherein the filtration apparatus is installed in a rainwater discharge chamber.   A filtration device comprising a screw for scraping impurities, a screen for discharging treated water, and a control panel for controlling the screw, wherein the control panel is provided in a rainwater discharge chamber.   A filtration device comprising a screw for scraping dust, a screen for discharging treated water, and a control panel for controlling the screw, wherein the screw is a ribbon screw.   A filtration device comprising a screw for scraping impurities, a screen for discharging treated water, and a control panel for controlling the screw, wherein the screw is provided with a brush.

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