JP2005177691A - Filtering device for curved dam - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a filtering device for a curved dam which can be installed by matching with the curved dam and does not increase the load of over-flow water after installation. <P>SOLUTION: In the filtering device for the curved dam provided with screw blades 23 raking up foreign matters, a screw shaft 24 driving the screw blades 23 and a screen 22 discharging treated water, the screen 22 has a perforated structure. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a bend weir filtration device that efficiently removes, conveys, and discharges sewage and sewage residue and contaminants to obtain treated water.

  In general, in the sewer, impurities from non-specific pollution sources flow in the rain, and the 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 are situations in which the contaminants damage the river and the surrounding water environment and landscape.

Therefore, in the combined sewer system, a screen device has been installed for the purpose of removing floating substances from the rainwater discharge chamber. The screen device is in the form of a bar screen, a screw, or the like, but the screw that can be installed without changing the height of the existing overflow weir is an effective device for avoiding inundation in the upstream area.

  Patent Document 1 discloses a screw conveyor that includes a cylindrical case, a screw shaft, and a blade body, and that transfers a material to be transferred within the case. The screw shaft is a core member. The case portion and the blade body in the vicinity where the universal joint is located are formed of a flexible member. Further, the case has a structure for performing soil removal work without polluting the pit even if the excavated soil is sludge or granular, and further, a case portion in the vicinity where the universal joint of the screw shaft is located and The blade body is also characterized by being formed of a flexible member.

JP-A-6-156672 (pages 2 and 3; FIG. 5)

  However, in the past, most of the installation locations of filtration devices have been installed in the overflow overflow weirs that have been used in the past, and the weirs are often not straight. And there is a problem that measures such as rebuilding are necessary. In addition, if a straight-line filtration device is attached to a non-straight weir, it will not be possible to secure an overflow length that is the same as the overflow length of the existing weir. There has been a problem that increases. In addition, there are many problems that the installation location of the filtration device is often difficult to carry in and install the device because there are many narrow manholes.

The present invention was made in order to solve the above-mentioned problems, and it is possible to install a filtration device corresponding to a curved weir and to filter a curved weir without increasing the overflow water load after the installation. An object is to provide an apparatus.
Another object of the present invention is to provide a bending weir filtering device that can be easily carried into a narrow space and installed.

  The bending weir filtration device according to the present invention is a bending weir filtration device comprising a screw blade for scraping dust, a screw shaft for driving the screw blade, and a screen for discharging treated water. It is characterized by having a bright structure.

  The bend weir filtering device according to the present invention is characterized in that the screw shaft is composed of a shaft piece and a flexible shaft joint.

  The bending dam filtration apparatus according to the present invention is characterized in that the screw shaft is made of a flexible member.

  The bend weir filtering apparatus according to the present invention is characterized in that the screw blade and the screw shaft can be divided.

According to the present invention, the following various excellent effects can be obtained.
(1) Since the screen has a perforated structure, there is an effect that it is possible to simultaneously remove impurities and obtain treated water.
(2) Since the screen can be installed corresponding to the bent weir, it is possible to install the screen in accordance with the existing weir shape, and there is an effect that it is not necessary to modify the civil engineering structure.
(3) Since the screen can be installed according to the curved weir, it is possible to install the screen according to the existing weir shape. This has the effect of eliminating the above.
(4) By making it possible to install the screen in response to the curved weir, it is possible to install the screen in accordance with the existing weir shape, so that construction costs associated with the modification of the civil engineering structure are eliminated. effective.
(5) Since the screen can be installed corresponding to the curved weir, it is possible to install the screen in accordance with the shape of the existing weir, so that the same overflow load as the existing weir length can be obtained. is there.
(6) The structure in which the screw blade and the screw shaft can be divided has the effect that they can be easily carried in even at a narrow carry-in port, and installation work in a narrow place becomes easier.
(7) The screw blade, screw shaft, and screen can be divided, and the design and production of the bending weir filtration device with different shapes and lengths for each installation location is unitized, making the design and production easier. There is an effect.

Hereinafter, an embodiment of the present invention will be described.
Embodiment 1 FIG.
FIG. 1 is a perspective view showing a rainwater spout chamber in a state in which a curved weir filtering device according to Embodiment 1 of the present invention is installed.
In FIG. 1, the rainwater discharge chamber 10 is divided into an upstream side 10 </ b> A and a downstream side 10 </ b> B by an existing bent weir 11. 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 bending dam filtration device 21 is installed in the bending dam 11 of the rainwater discharge chamber 10, and the detailed structure of the bending dam filtration device 21 will be described later. Further, the rainwater discharge chamber 10 is provided with a waterproof terminal box 17 having a built-in control panel (not shown) for controlling a drive device (motor or the like) 29 of the bending weir filtering device 21. Furthermore, a steel pipe lead-in column 18 for residential use is installed outside the rainwater discharge chamber 10.

Next, the detailed structure of the bending dam filtration device 21 according to the first embodiment of the present invention will be described.
2 is an exploded schematic view of the screw blade and screw shaft of the bending weir filtration device according to Embodiment 1 of the present invention, and FIG. 3 is a partial view of the screw blade and screw shaft of the bending weir filtration device in FIG. 4 is a split view of one pitch of the screen, screw blades, and screw shaft (shaft piece and flexible joint) in FIG. 1, FIG. 5 is a sectional view taken along line AA in FIG. 3, and FIG. -B sectional view, FIG. 7 is an axial sectional view of the screen, screw blades and screw shaft (curvature radius 3600 mm).
The filtration device 21 is installed along the downstream side wall surface of the bent weir 11 and captures contaminants and discharges treated water. The filter 21 is assembled in the screen 22 to dispose the contaminants on one end side in the axial direction. A screw blade 23 that scrapes and a screw shaft 24 of the screw blade 23 are provided, and the screen 22, the screw blade 23, and the screw shaft 24 have a structure that can be divided. A scraper 30 (see FIG. 7) is installed on the end side of the screw blade 23 to return the scraping dust to the upstream side 10 </ b> A of the bending weir 11 in conjunction with the screw shaft 24. A brush 35 may be attached to the outer periphery of the screw blade 23. The screw blade 23 is provided on the screw shaft 24 in a spiral shape when viewed as a whole.

  More specifically, the screen 22 has a perforated structure having a large number of screen holes. For example, the punching metal affects the water level on the inflow pipe ridge side as shown in FIGS. If there is not, it is configured in a semicircular shape along the screw, and the discharge pipe side is raised, but if it affects the water level on the inflow pipe side, it will be formed in a semicircular cross section. is there. The height of the screen 22 is set to a position equal to or lower than the dynamic water level on the inflow side, that is, a position equal to or lower than the inflow water level in rainy weather, so that the water level on the inflow pipe side is not affected. This is a configuration in which the screen 22 is installed on the curved 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. In addition, it is sufficient for the screen 22 to have a space behind (downstream) the bending weir 11, and it is not necessary to adjust the height of the bending 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 FIGS. 2 to 4, the screw blade 23 and the screw shaft 24 are divided into, for example, a plurality of pitches of the screw blade 23. Here, for convenience of explanation, the screw shaft 24 divided for each pitch of the screw blades 23 is the shaft pieces 24A and 24B, and the one-screw screw blades integrated with the shaft pieces 24A and 24B are 23A and 23B. explain.
The shaft pieces 24 </ b> A and 24 </ b> B are detachably connected by a flexible joint 25. The flexible joint 25 includes a hemispherical center convex portion 26 integrally provided at the center of the connected end surface of one shaft piece 24A, and the shaft piece 24A covered so as to surround the central convex portion 26. A plurality of torque transmission pins 27 projecting from the connecting end face, a torque transmitting fork 28 projecting integrally from the connected end of the other shaft piece 24B, and the connected ends of the shaft pieces 24A and 24B. Power is transmitted by being configured in combination with a flexible member 31 such as rubber to be interposed.

  The flexible member 31 is provided on the opposing surface side of the concave and convex portions 31a and 31b formed on the outer periphery, the axial through hole 31c provided in the convex portion 31b, and the one shaft piece 24A. And a central recess 31d. In the flexible member 31 configured in this way, the torque transmission pin 27 of one shaft piece 24A is inserted into each through hole 31c of the outer peripheral convex portion 31b, and the central convex portion 26 is fitted into the central concave portion 31d. In addition, the torque transmitting fork 28 of the other shaft piece 24B is fitted into the outer peripheral recess 31a, so that both the shaft pieces 24A and 24B are connected to each other in a bendable manner. When the shaft pieces 24A and 24B are connected to each other in this way, the screw blades 23A and 23B for each pitch integral with the shaft pieces 24A and 24B are screwed in the respective circumferential ends in FIG. It overlaps as shown by the blade overlap margin H. It is desirable that a screw presser 32 (see FIG. 6) attached to the screen 22 be disposed in the vicinity of the curvature of the shaft piece. However, it may be disposed in another part in the installation. .

Next, the operation will be described.
The sewage (rainwater, etc.) 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 over the curved weir 11. The sewage that has passed over the bending weir 11 flows into the filtering device 21 for the bending weir. In this state, the motor 29 is driven by a control signal from a control panel (not shown) built in the waterproof terminal box 17, whereby the screw blades 23 rotate together with the screw shaft 24, and enter the screen 22. The contaminants contained in the inflowing water that flows in are captured by the screen 22. The foreign matter captured by the screen 22 is transferred in the axial direction by the screw blades 23, is returned to the upstream side of the bending weir 11 by the scraper 30 on the end side, and flows to the intercepting pipe rod 14. On the other hand, the inflowing water that has flowed into the screen 22 passes through a hole made in the screen 22 and flows into the discharge pipe 15 as treated water.

In the above, as the flexible joint 25, a general shaft joint such as a rubber shaft joint or a universal joint can be used as long as it is flexible and can withstand use. Note that the screw shaft 24 may be formed of a flexible member depending on the object to be excluded.
Further, as the flexible member 29, for example, natural rubber, synthetic rubber, or a synthetic resin having flexibility can be used. The flexible joint 25 is made of a steel material other than the flexible member 29. However, the flexible joint 25 may be formed of a flexible member as long as it is strong enough to be used.
The screw blades 23 are made of steel, and are configured to be divided by being smoothly overlapped. However, any structure can be used as long as it can smoothly remove impurities and can be divided. It is also possible to form the entire screw blade 23 with a flexible member, but in this case, the strength necessary to eliminate impurities and the deflection necessary to enable the curvature structure are obtained. A flexible member that can be used is used. Furthermore, the embodiment of the present invention is characterized in that the screw presser 32 is provided as described above in order to suppress the shaking and popping of the screw blade 23 when the screw blade 23 is driven.

  Further, in the first embodiment, the screen 22 is also made of steel, and is formed so as to be separable so that it can be easily carried into and installed in the installation location. . As a member used for such a screen 22, a hole was made on the entire surface of the steel material. However, the shape is not limited to a round hole as long as the treated water can easily pass through, such as a slit. You may dawn.

  Further, in the first embodiment, the screw blades 23 are divided at every pitch in order to enable the curvature structure of the bending weir filtering device 21, but are divided at every 1/2 pitch and 1/3 pitch. It is also possible to make a divided structure that can cope with a large bend. The same applies to the screw blades 23, and the screw blades 23 and the screw shaft 24 can cope with any curved weir.

  According to the first embodiment described above, the screen 22 is perforated and can be divided into a plurality of parts, and the screw shaft 24 and the screw blade 23 of the screw installed in the screen 22 are connected to one screw blade 23. Divided for each pitch, and the divided screw shafts 24A and 24B are connected by a flexible joint 25. In the connected state, the circumferential ends of the divided screw blades 23A and 23B are bent so as to overlap. Since the filtration device is constructed, it is possible to assemble the bending weir filtration device to a curvature corresponding to that of the bending weir 11 (according to the shape of the weir), and there is no need to modify the civil engineering structure. In addition, there are no changes in the channel shape, dead space, etc., and there is an effect that the construction cost associated with the modification of the civil engineering structure becomes unnecessary. Furthermore, since the installation according to the shape of the bending weir 11 is possible as described above, there is an effect that the overflow load can be freely changed. Further, since the screw shaft 24 and the screw blade 23 can be divided and the screen 22 can also be divided, it is possible to carry in even a narrow entrance by disassembling them, and the installation work in a narrow place becomes easier. In addition, there is an effect that the design and production of the filtration device having different shapes and lengths for each installation place is unitized, and the design becomes easy.

  The flexible joint 25 of the screw shaft 24 may be used at one or more places on a part of the screw shaft 24 or may be used at a plurality of places on the entire screw shaft 24. The corresponding screw blades 23 may be formed so as to be separable.

Embodiment 2. FIG.
FIG. 8 (A) is a plan view showing a power transmission piece and screw blades provided in the bend weir filtering device according to Embodiment 2 of the present invention, and FIG. 8 (B) is a cross-sectional view taken along line CC in FIG. 8 (A). FIG.
In this Embodiment 2, it is set as the bending dam filtration apparatus 21 of the structure using the screw blades 24A and 24B without a screw shaft, As a means which enables the curvature structure of the bending dam filtration apparatus 21, it is power. The structure is such that power can be transmitted by the transmission piece 33. That is, in this Embodiment 2, in screw blade 23A, 23B divided | segmented for every pitch, the one end part of the power transmission piece 33 adheres to the one screw blade 23A at the circumferential direction edge part by welding etc., The other end portion of the power transmission piece 33 is connected to the circumferential end portion of the other screw blade 23 </ b> B so that play is generated with a screw 34. It should be noted that both ends of the power transmission piece 33 may be coupled to the respective circumferential end portions of the screw blades 23A and 23B with screws 34 so that play is generated respectively. Moreover, it is also possible to carry out by forming the screw blades 23A and 23B entirely from a flexible member. In this case, it is possible to obtain the strength necessary to eliminate contaminants contained in the inflowing water flowing into the screen 22 and the bending necessary to enable the curvature structure of the bending weir filtering device 21. A flexible member is used.

It is a perspective view which fractures | ruptures and shows the rain water discharge chamber of the state which installed the filtration apparatus for bends by Embodiment 1 of this invention. It is a decomposition schematic diagram of a screw blade and a screw axis of a filtration device for bent dams according to Embodiment 1 of the present invention. FIG. 3 is a partial view of a screw blade and a screw shaft of the bending weir filtering device in FIG. It is a division figure for 1 pitch of the screen, screw blade, and screw shaft (shaft piece and flexible joint) in FIG. It is sectional drawing of the AA sectional view taken on the line of FIG. It is the BB sectional view taken on the line of FIG. It is an axial sectional view of a screen, screw blades and screw shaft. FIG. 8 (A) is a plan view showing a power transmission piece and screw blades provided in the bend weir filtering device according to Embodiment 2 of the present invention, and FIG. 8 (B) is a cross-sectional view taken along line CC in FIG. 8 (A). FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Rainwater spout chamber 10A Upstream side 10B Downstream side 11 Curved weir 12, 13 Inlet pipe rod 14 Intercepting tube rod 15 Drain tube rod 17 Waterproof terminal box (control panel)
18 Residual Steel Pipe Pulling Column 21 Residential Weir Filter 22 Screen 23, 23A, 23B Screw Blade 24 Screw Shaft 24A, 24B Shaft Piece 25 Flexible Joint 26 Center Convex 27 Torque Transmitting Pin 28 Torque Transmitting Fork 29 Drive Device 30 Scraper 31 Flexible member 31a, 31b Uneven portion 31c Through hole 31d Center recessed portion 32 Screw presser 33 Power transmission piece 34 Screw 35 Brush

Claims (4)

  A bent weir comprising a screw blade for scraping dust, a screw shaft for driving the screw blade, and a screen for discharging treated water, wherein the screen is perforated. Filtration equipment.   The said weir shaft consists of a shaft piece and a flexible shaft coupling, The bending dam filtration apparatus of Claim 1 characterized by the above-mentioned.   The said screw shaft consists of flexible members, The filtration apparatus for bending weirs in any one of Claim 1 or Claim 2 characterized by the above-mentioned.   The said weir blade and the said screw axis | shaft can be divided | segmented, The filtration apparatus for bending weirs in any one of Claims 1-3 characterized by the above-mentioned.

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