JP7734962B2 - Improved aquarium tank - Google Patents

Description

The present invention relates to an improved water tank used to treat muddy water at construction sites, etc.

During construction work in urban areas, muddy water is generated during construction, and water tanks have been used to treat and clarify this muddy water. The capacity of these water tanks is generally about 1 to 40 ^m3 . Typical water tank structures include a rectangular tank 1 with a muddy water inlet 2 on one side and a drain outlet 3 on the other, as shown in Figure 1, and a notched tank with a notched partition wall 5 with a single V-shaped notch 4 near the drain outlet 3 inside the rectangular tank 1, as shown in Figure 2.
Furthermore, these water tanks are designed so that any contaminants that accumulate at the bottom of the tanks during the treatment of muddy water are removed and disposed of as needed.
The capacity of these conventional water tanks was determined based on the planned amount of muddy water to be treated, but in today's small construction sites, space constraints make it difficult to change water tanks, especially if there is a change in the treatment volume, such as a significant increase.

Various methods have been proposed to treat such muddy water. For example, known examples include a raw water treatment method for treating polluted water generated within a pollution prevention frame, in which polluted water is taken in, a small, partitioned retention area is created, and a flocculant is added to the retention area (Patent Document 1); a method for continuously treating turbid water in a sedimentation treatment facility that uses multiple settling tanks simultaneously to clarify turbid water, in which, when at least one settling tank is out of service, multiple streamlined membranes are deployed in at least one of the other settling tanks in use, with gaps between each adjacent membrane, allowing treatment without reducing the amount of turbid water being treated (Patent Document 2); a settling device having inlet and outlet ports for polluted water, in which a rush body is provided to shield the outlet port (Patent Document 3); and a water intake method for a settling device that takes water from the surface flow portion near the midpoint between the raw water inlet and outlet port of the clarifier, with a girder of various cross-sectional shapes such as semicircular or obovate, partially submerged below the water surface, provided near the midpoint between the inlet and outlet port of the clarifier (Patent Document 4).

JP 2010-274161 A JP 2014-151297 A JP 2017-74539 A JP 2019-89025 A

The inventor therefore conducted extensive research into a compact water tank with high processing capacity that can process muddy water even when the processing volume fluctuates without the need to replace the tank, and has now completed this invention.

In other words, the present invention is an aquarium tank that has a water collection trough with multiple cutouts on its upper edge, attached to and/or spaced from the side wall of the tank where the drain outlet is located, a rush body made of a fibrous aggregate attached to the front surface (intake side) of the water collection trough, and multiple water flow gradient membranes stretched parallel to the water collection trough between the tank side wall where the intake is located and the rush body.

The water tank of the present invention has multiple notches in the collection trough, which allows the water flow to diffuse and slow down, eliminating dead space in the water tank and increasing the efficiency of the water tank. This diversifies the flow lines, improving water collection and drainage in the water tank and promoting the settling of pollutants. Another advantage is that a single small water tank can handle fluctuations in the amount of muddy water to be treated, which does not affect the construction schedule. Furthermore, existing water tanks can be easily modified to become the water tank of the present invention.

Perspective view of a conventional aquarium tank FIG. 1 is a perspective view of a conventional aquarium tank showing another embodiment. A perspective view of the water tank of the present invention. FIG. 10 is a cross-sectional view showing another embodiment of the water collecting trough of the present invention. FIG. 10 is a cross-sectional view of another embodiment of the spaced apart water collection troughs of the present invention. 1 is a front view of a rush body according to the present invention; A perspective view of a membrane-type rush body with a float 10 is a cross-sectional view of a membrane-shaped rush body with a float, showing another embodiment. Front view of connected water flow gradient membranes 1 is a perspective view of a water tank having a water channel on the upper edge of the water tank of the present invention; FIG. 10 is a perspective view of an aquarium tank having a water channel provided on the upper edge of the aquarium tank, showing another embodiment of the present invention;

Next, the present invention will be described with reference to the drawings, but the present invention is not limited to the following description.
FIG. 3 is a perspective view showing one embodiment of the water tank of the present invention.
The water tank 1 has a muddy water intake 2 on one side and a discharge outlet 3 on the other side. A water collecting trough 5 having a plurality of notches 4 is provided on the side wall of the discharge outlet 3 and/or at a position upstream of the discharge outlet 3, spaced apart.

The water collection trough 5', which is provided at a distance from the side wall of the drain outlet 3, is provided with a drain outlet (not shown) for directly discharging the collected and clarified treated water out of the water tank. In another embodiment, the water collection trough 5' and the water collection trough 5 are connected by a gutter (not shown), and the treated water collected and clarified in the water collection trough 5' flows into the water collection trough 5, and is discharged out of the water tank from the drain outlet 3 together with the treated water collected in the water collection trough 5. Furthermore, as shown in Figure 4, it is also preferable to connect the bottom of the water collection trough 5' and the water collection trough 5 with a pipe, so that the treated water collected and clarified in the water collection trough 5' flows into the water collection trough 5, and is discharged out of the water tank from the drain outlet 3 together with the treated water collected in the water collection trough 5.
Furthermore, in the case of the water collection trough 5, which is provided in close contact with the side wall on which the outlet 3 is provided, the clarified treated water is directly discharged to the outside of the system from the outlet 3. In another embodiment, in the case of the water collection trough 5', which is provided away from the side wall on which the outlet 3 is provided, notches can be provided on two surfaces of the water collection surface, one on the intake 2 side and the other on the outlet 3 side of the water collection trough 5, which is preferable because this reduces the speed of the overflowing treated water.

By providing a plurality of notches 4 in the water collecting troughs 5 and 5', the speed of the treated water overflowing the notches 4 is slowed down, further improving the clarification effect. It is preferable to provide the notches 4 over the entire upper edge of the water collecting troughs 5 and 5'.
The shape of the notch 4 of the water collecting trough 5 and the water collecting trough 5' can be various shapes such as a conventional V-shape, an upwardly open U-shape, a semicircular shape, etc.
An improved opening can be provided by providing a plurality of openings between the side walls of the water collecting trough 5 and the water collecting trough 5' and providing doors that can slide laterally at the openings (not shown). The doors of the openings are connected to a slide rod provided at the top, and by moving the slide rod left and right, all the doors can be moved simultaneously to open and close the openings.
Furthermore, it is preferable that the water collecting trough 5' has a lower edge wall 6 at the bottom of the water collecting trough 5' as shown in Figure 5. The attachment position of the lower edge wall 6 is not particularly limited.

Furthermore, in the present invention, rush bodies 7 (hereinafter referred to as rush bodies) made of fibrous water collecting material are provided adjacent to and in parallel with the water collecting troughs 5 and 5' on the upstream side (the water intake 2 side) of the water collecting troughs 5 and 5'.
The rush body 7 in the present invention is, as shown in FIG . 6, a core body 8 from which loop-shaped fibrous bodies 9 protrude on both sides.
Another embodiment of the rush body 7 is a membrane-like rush body 14 with a float, as shown in FIG. 7, in which a net 12 is suspended from a float 11 having an insertion port 10 for a rope or the like, a weight 13 is attached to the lower edge of the net 12, and the rush body 7 is then integrally attached to one or both sides of the net 12.

Also, as shown in Figure 8, two nets 12 are suspended from a float 11, and rush bodies 7 are integrally attached to the two nets 12 to form a membrane-like rush body 14 with a float, in which the rush body 7 on the water intake 2 side is suspended and the lower edge of the rush body 7 on the water collection trough 5 side is fixed to the water collection trough 5.
The lash body 7 suspended on the intake 2 side effectively captures particles flowing through the cross section of the water flow, while the lash body 7 on the water collection trough 5 side effectively captures particles in the flow rising toward the water collection trough 5.
The particles captured by the rush body 7 become enlarged, then peel off and capture new particles again, but when the muddy water treatment in the water tank 1 is stopped, the particles captured by the rush body 7 are knocked off, so that when the muddy water treatment is resumed, the rush body 7 can capture new polluted particles, and the polluted substances accumulated in the water tank are extracted, thereby ensuring the capacity of the water tank.

In addition, the water tank 1 of the present invention has a water flow gradient membrane 17 formed by suspending a sheet membrane 15 from a float 11 between the side wall of the water tank where the water intake 2 is provided and the water collection trough 5' and/or between the water collection trough 5' and the water collection trough 5, and by connecting shields each having a weight 16 attached to the lower edge of the sheet membrane 15 so as to leave a gap between the sheet membrane 15 of adjacent shields, and the water flow gradient membranes 17 are extended in multiple layers parallel to the rush body 7. When the water flow gradient membranes 17 are extended in multiple layers, the water flow senses the fluid resistance of the water flow gradient membranes 17 and alternates between turbulent flow, blocked flow, laminar flow, advection flow, contraction flow and Karman flow, causing the water flow to meander, allowing the water to flow widely within the water tank and preventing dead space from being generated at the four corners of the water tank 1.
Furthermore, the water tank 1 with multiple water flow gradient membranes 17 spread over it has improved multi-functional effects such as an increase in the cross-sectional water flow area of the water tank 1, an extension of the water collection distance, an increase in retention time, an improvement in dead space, promotion of settling of initial particle groups, promotion of contact filtration, adhesion and settling of particle groups, an increase in processing volume, and a compact sedimentation tank.
When the water flow gradient membranes 17 are deployed in multiple locations, it is preferable to deploy the front and rear water flow gradient membranes 17 alternately to the left and right so that they do not overlap at the same position.

Furthermore, when using the water tank 1 of the present invention to treat the muddy water generated in a short time using a flocculant, a water channel 18 can be provided along the upper side wall of the water tank 1, as shown in Figure 10, and a flocculant inlet 20 can be provided at the muddy water inlet (corresponding to the water intake) 19, allowing the flocculant to be added to the muddy water, thereby enabling good treatment.
The water channel 18 surrounds the four sides of the water tank 1, and a tortuous flow stirring plate 22 is provided on the inner side wall 21 of the water channel 18.
The tortuous flow mixing plates 22 are provided alternately on the left and right side walls 21 inside the water channel 18 to make the muddy water meander.
It is preferable that the spacing between the contiguous flow agitating plates 22 be narrow to rapidly mix the muddy water on the inlet side, and that the spacing between the contiguous flow agitating plates 22 be wide to gradually slow down the mixing.
As another embodiment of providing the water channel 18 in the upper part of the water tank 1, it is also preferable to provide the water channel 18 inward from the side wall of the upper part of the water tank 1, as shown in FIG.
The flocculants used are in liquid and solid form. The liquid dissolves immediately and needs to be added constantly, while the solid dissolves gradually and only needs to be added once a day, making operation and management simple.

1... Water tank 5... Water collecting trough with cutout 5'... Water collecting trough with cutout 7... Rush body 17... Water flow inclined membrane

Claims (1)

An improved water tank, characterized in that a water collection trough having a plurality of notches at its upper edge is provided in close contact with and/or spaced from the side wall of the water tank where the drain outlet is provided , a rush body having looped fibrous bodies protruding from a core on both sides is provided adjacent to the front of the water collection trough , a sheet membrane is suspended from a float parallel to the water collection trough between the tank side wall where the water intake is provided and the rush body, and multiple water flow inclined membranes are deployed in which blocking bodies with weights attached to the lower edge of the sheet membrane are connected so as to have a gap between the sheet membrane of adjacent blocking bodies .