JPS6261358B2 - - Google Patents

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention particularly relates to a method for aerating sewage in sewage relay pumping stations, agricultural village drainage canals, household/industrial drainage canals, other irrigation canals, and rivers. Concerning an aeration method using a water pump.

(Prior art) The simplest and most primitive method of aerating sewage is to create a step-like drop in the roadbed or riverbed, as seen in agricultural canals and rivers, and use this drop to collect the sewage that falls by gravity. It is brought into contact with air. However, this method has poor aeration efficiency, and in order to obtain a predetermined aeration effect, it is necessary to install a large number of steps within a spatial extension, which is subject to space constraints. Furthermore, the above method cannot be used in areas where sewage is stagnant or where there is no flow of sewage.

(Problems to be Solved by the Invention) In view of the above-mentioned points, the present invention uses a rotating conical pump that lifts sewage to a required height and drops it, thereby improving the flow of sewage into areas where stagnation occurs. In areas where there is no water, it can exert a pumping action to fluidize wastewater, and at the same time add an efficient aeration action to the fluidization process.
Therefore, it is an object of the present invention to provide an aeration method that does not cause any deterioration in aeration efficiency even if the space is limited.

(Means for Solving the Problems) The present invention configures a water pump by integrally providing impeller blades in the hollow interior of a cone-shaped impeller with openings at the upper and lower parts, and With the mouth submerged in the water to be treated and the required external head of the pump being formed between the upper water outlet and the surface of the water falling to be treated, the pump is rotatably supported on a fixed frame, and the pump is It is rotated by a motor and aerated in the water pumping region along the inner circumferential surface of the cone of the impeller, the water to be treated scattering part from the water outlet, and the drop part outside the pump.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

In Fig. 1, 1 is a rotary conical pump (lifting pump), and there are two blades integrally installed inside the cone-shaped hollow interior.
The impeller 3 has an impeller 3 having a lower opening thereof as a water intake port 4, and an upper opening 5 in which a diff user 6 is fitted. Reference numeral 7 denotes a partition wall (fixed frame) installed in the water to be treated 8. A box-shaped water-blocking chamber 10 with an opening 9 on one side is connected to the upper part of the partition wall 7, and the water-blocking chamber 10 is opened downward. Deaf user 6 who penetrated from
is fixedly supported. In addition, the impeller 3 has a water-blocking chamber 10
It is rotatably supported via a bearing 12 on a hanging frame 11 hanging down from the lower surface of the holder. This impeller 3 is suspended from a pump main shaft 14 led from a motor 13.

The pump 1 has its water inlet 4 submerged in the water to be treated 8, and the motor 13 The water to be treated 8 is sucked in from the water inlet 4 and pumped along the inner circumferential surface 15 of the cone under the influence of centrifugal force accompanied by a vortex motion, and is scattered from the upper edge of the diff user 6 to reach the water shielding chamber opening 9. fall from

In addition, in the case of the figure, the partition wall 7 is for separating the water to be treated 8 and the treated water 8a after aeration, and the water-blocking chamber 10 is for separating the water to be treated 8 that has been pumped up and the treated water 8a without being recycled. Since it is provided so that it falls to the 8a side, when there is no need to distinguish between the water to be treated and the treated water 8a as described above, the water-shielding chamber 10 is not necessary, and the partition wall 7 is used to prevent the pump 1 from being separated. Any fixed frame that holds it will suffice.

The water pumping profile inside the impeller is as shown in FIG. A narrow, conically-shaped cavity 16 is formed in the part, and therefore, the water to be treated 8 comes into surface contact with the air in the cavity 16 in the pumping area 17 along the inner circumferential surface 15 of the cone. Aeration is applied.

In addition, the pumped water to be treated 8 is supplied to the diffuser 6
It reaches the upper edge and is emitted directly into the water barrier chamber 10 or, if there is no water barrier chamber, into the air and scatters, and this scattering part 1
8, it comes into significant contact with air, and aeration is applied here as well.

Next, the scattered water 8 to be treated falls down a head outside the pump due to gravity, and since it also comes into contact with air during this falling process, it is aerated.

Therefore, aeration of the water to be treated 8 is carried out over almost the entire area from the beginning of pumping to the end of dropping, and highly efficient aeration becomes possible.

FIG. 3 shows the method of the present invention applied to a sewage relay pumping station, in which a lifting pump 1 is installed inside a manhole 21, and a suction pipe 19 is connected to the manhole 21.
The wastewater that has flowed into the tank is pumped up and sent to the discharge pipe 20. In the case of conventional small-scale wastewater relay pumping stations, submersible pumps are installed in manholes,
This is used to send wastewater from the suction pipe to the discharge pipe, but with this method, the aeration process for the wastewater must be performed elsewhere, and the pump itself is completely submerged in water, making maintenance easier. However, according to the present invention as shown in FIG. 3, aeration treatment can be applied at the same place at the same time as sewage relay, and since the water pump 1 is not completely submerged in water,
Its maintenance becomes much easier.

(Effects of the Invention) According to the present invention, aeration is added to the water to be treated by pumping water with a water pump, that is, a rotary conical pump, and then letting it fall. However, since the water to be treated can be moved and aerated, there are no restrictions on where it can be used, and it can greatly contribute to improving water quality.

Moreover, aeration can be applied to almost the entire area from the beginning of pumping until the end of the drop, including the pumping area along the inner peripheral surface of the impeller cone, the area where the water to be treated is scattered from the water outlet, and the drop area outside the pump. The aeration efficiency is extremely high and the installation space is small, making it possible to provide an economical and highly practical aeration method.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of an aeration method using a pump showing an embodiment of the present invention, Fig. 2 is a pumping profile of the pump shown in Fig. 1, and Fig. 3 is a block diagram showing an example of the scope of application of the method of the present invention. . 1... Rotating conical pump (lifting pump), 2...
...Blade, 3... Impeller, 4... Water inlet, 6...
Diff user (water outlet), 7... Partition wall (fixed frame), 8... Water to be treated, 13... Motor, 15
... Cone inner peripheral surface, 17 ... Pumping area portion, 18 ...
...Scattered part, H...Head.

Claims (1)

[Claims] 1. A water pump is constructed by integrally installing impeller blades in the hollow interior of a cone-shaped impeller with openings at the top and bottom. With the required external head of the pump formed between the water inlet and the falling surface of the water to be treated, the pump is rotatably supported on a fixed frame, and the pump is rotated by a motor, and the inner circumference of the cone of the impeller is rotated. An aeration method using a water pump, characterized in that aeration is carried out in a pumping area along a surface, a part where water to be treated is scattered from the water outlet, and a drop part outside the pump.