JPH09285798A - River purifying device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To embody a device which does not require the installation of weirs in rivers and for which a power source is not needed. SOLUTION: This device is provided with a pair of aeration cylindrical bodies 1 which are provided with plural holes 2 on their side walls and are arranged under a water surface 13 while lined up in a direction orthogonal with water flow, a pair of arms 5 from which the respective aeration cylindrical bodies 1 are suspended, an air pump 9 of which the piston rod part and cylinder part are pinned respectively to the top end of the respective arms 5 and which is driven by the arms 5 to supply air into the aeration cylindrical bodies 1 and supporting parts 11, 12, 14, 15 which are coupled with both ends of a pair of shafts 16 penetrated with the central parts of the respective arms 5 via bearings 6. The air pump 9 is driven by utilizing the self-excited vibration by the water flow of the aeration cylindrical bodies 1. As a result, the need for a power source is eliminated and the use of the device even in a place where the power source is not available is possible. The device which produces less noises, is low in a running cost, is easy to handle and is capable of well purifying the river is embodied.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a river purification device.

[0002]

2. Description of the Related Art A conventional river purification apparatus will be described with reference to FIGS. The conventional device shown in FIG. 2 is disclosed in Japanese Patent Laid-Open No. 07-112195, and the weir 10
The water pump driving pump 101 is driven by the head difference between the upstream side and the downstream side of 2, and the water of the river a is pumped by this pump 101,
This water is sent to the purification device installed on the slope of the embankment d to flow down through the gravel 104 in the device.

In this way, air was mixed with river water to increase dissolved oxygen and improve water quality. That is, the energy of water is used to drive the pump 101, and air is mixed with river water to improve the water quality.

The conventional apparatus shown in FIG. 3 is disclosed in Japanese Patent Laid-Open No. 7-22.
It was disclosed in 2995, and the diffuser holes 1 on the riverbed.
The air diffuser 130 provided with 70 is arranged, air is sent from the air supply source 150 to this through the pipe 140, the air is mixed with the river water, and the water quality is improved.

The concept of purifying river water by air mixing is the same as the above, and it is superior to that shown in FIG. 2 in that aeration can be performed over the entire flow, but the energy to be the air supply source 150 is improved. Source needed.

[0006]

SUMMARY OF THE INVENTION In a conventional device,
In the case of the one shown in Fig. 2, it is necessary to newly install a weir in the river, and because the water drop due to the weir is used, the energy use efficiency is poor, and further aeration of a sufficient amount of water is expected. could not.

In the case of the one shown in FIG. 3, a power source for driving the air supply source is required, the running cost is high, the installation place is largely restricted, and it is not suitable for transportation. The present invention seeks to solve the above problems.

[0008]

According to a first aspect of the present invention, there is provided a plurality of holes on each side wall of the river purification device, which are arranged in a direction orthogonal to the water flow with their central axes being vertical. A pair of aeration cylinders arranged under the water surface,
A pair of arms on which the same aeration cylinder is suspended at the lower ends, respectively, provided between the upper ends of the respective arms, and the piston rod portion and the cylinder portion of which are pin-coupled to the upper ends of the respective aeration cylinders. An air pump to which an air pipe communicating with the above is connected, a pair of shafts that are arranged in the horizontal direction through the center of each of the arms through bearings, and the ends of the respective shafts are connected. It is characterized by having a supporting part.

In the above, when a pair of aeration cylinders are arranged in a direction orthogonal to the water flow and immersed in the flowing water of the river, each aeration cylinder causes self-excited vibration, and each vibrates in the opposite phase.

The vibrations of the respective aeration cylinders are transmitted to the arms so that the upper end portions of the respective arms perform an opening / closing movement, and this opening / closing movement is transmitted to an air pump to drive it, and the pump intermittently. The air is discharged to the respective aeration cylinders through the air pipe.

The air supplied into each of the aeration cylinders blows out as bubbles into the running water through a plurality of holes provided in the side wall of the aeration cylinder, and is mixed with the running water to purify the river.

In the present invention, since the air pump is driven by utilizing the self-excited vibration of the aeration cylinder due to the water flow, it does not require a power source and can be used even without a power source.
To realize a device with low noise, low operating cost, easy handling, and good river purification.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION A river purification apparatus according to an embodiment of the present invention will be described with reference to FIGS. 1 (a) and 1 (b).

In FIGS. 1 (a) and 1 (b), reference numeral 1 is an aeration cylinder which is arranged below the water surface 13 by arranging two of them in a direction orthogonal to the water flow 4 with the central axis being the vertical direction. ,
A large number of holes 2 through which bubbles 3 are blown out are provided on the side wall.
Numeral 5 is an arm having the respective lower ends on which the respective aeration cylinders 1 are suspended, and the respective central portions are supported by the respective shafts 16 via the respective bearings 6.

Reference numeral 7 is a spring, and each of the arms 5 is
Connected between the lower parts of the. Reference numeral 9 denotes an air pump, the piston rod portion and the cylinder portion of which are connected to the upper ends of the respective arms 5 by a pin joint 8, and the air discharged by the air pump 9 is passed through the air pipe 10 to each of the above. It is fed into the aeration cylinder 1 of.

Reference numeral 11 denotes four pillars arranged on the base 12. Reference numeral 14 denotes two shaft support beams mounted on the column 11, two intermediate beams 15 are connected to each other, and the two shafts 16 are connected to each other. In addition, the pillar 11, the table 12,
The shaft support beam 14 and the intermediate beam 15 form a support portion.

In the above, when the river purification apparatus according to this embodiment is installed in a river as shown in FIG. 1 and the aeration cylinders 1 are immersed in running water, the respective aeration cylinders 1 are expressed by the following formula (1). When the condition shown by is satisfied, self-excited vibration occurs, and each vibrates in opposite phase.

V / fD ≧ K (mδ / ρD ² ) ^1/2 ………………………… (1) where V is the flow velocity of the river and f is the natural vibration of the aeration cylinder 1. Number, D is the diameter of the aeration cylinder 1, K is a constant, m is the mass per unit length of the aeration cylinder 1, δ is the logarithmic decrement of the aeration cylinder 1, and ρ is the density of river water.

Therefore, the self-excited vibration can be generated by previously measuring the flow velocity of the river at the place where the aeration cylinder 1 is installed and adjusting the support spring constant and the damping coefficient of the spring 7.

The anti-phase vibrations generated by the respective aeration cylinders 1 are transmitted to the respective arms 5 so that the tips of the respective arms 5 perform opening / closing movements, and the opening / closing movements are transmitted to the air pump 9. The piston rod portion and the cylinder portion of the air pump 9 are reciprocated so as to face each other.

The air intermittently discharged by the air pump 9 by this reciprocating motion is supplied into the respective aeration cylinders 1 through the air pipe 10, and a large number of holes are formed in the side walls of the aeration cylinders 1. Bubbles 3 are blown out from 2, and the bubbles 3 are mixed with running water to purify the river.

In this embodiment, the air pump is driven by utilizing the self-excited vibration due to the water flow of the aeration cylinder, and the bubbles are blown out into the running water. Therefore, the operation cost is low, and the river is purified even when there is no power source. The device is easy to handle and has no noise from the compressor. The number of installed rivers can be increased or decreased depending on the width of the river.

[0023]

According to the river purification apparatus of the present invention, a pair of aeration cylinders having a plurality of holes formed in the side wall and arranged below the water surface in a direction orthogonal to the water flow are suspended. A pair of arms, a piston rod portion and a cylinder portion that are pin-coupled to the upper ends of the respective arms, are driven by the arms, and supply air into the respective aeration cylinders; Since the center part of the arm is provided with the support part to which both ends of the pair of shafts penetrating through the bearing are connected, the air pump is driven by utilizing the self-excited vibration of the aeration cylinder due to the water flow. A device that does not require a power source and can be used even without a power source, has low noise, is low in operating cost, is easy to handle, and can perform good river purification.

[Brief description of drawings]

FIG. 1 is an explanatory view of a river purification apparatus according to an embodiment of the present invention, (a) is a front view and (b) is a plan view.

FIG. 2 is an explanatory view of an example of a conventional river purification device, (a)
Is a plan view and (b) is a side view.

FIG. 3 is an explanatory view of another example of the conventional river purification device,
(A) is a front view, (b) is a perspective view.

[Explanation of symbols]

 1 Aeration Cylindrical Body 2 Hole 3 Bubble 4 Flow 5 Arm 6 Bearing 7 Spring 8 Pin Joint 9 Air Pump 10 Air Piping 11 Struts 12 Units 13 Water Surface 14 Shaft Support Beam 15 Intermediate Beam 16 Shaft

Claims (1)

[Claims] 1. A pair of aeration cylinders, each having a plurality of holes formed in each side wall, arranged in a direction orthogonal to a water flow with the central axis of each hole being vertical and arranged below the water surface, and the aeration cylinders. A pair of arms suspended at their lower ends, and air that is provided between the upper ends of the respective arms and has its piston rod portion and cylinder portion pin-connected to the upper ends of the respective arms to communicate with the respective aeration cylinders. An air pump to which a piping for connection is connected, and a central portion of each of the above arms is pierced through a bearing and horizontally arranged 1
A river purification device comprising a pair of shafts and a support portion to which end portions of the respective shafts are connected.