JPS61141998A - Aeration method utilizing storage pump - Google Patents

Abstract

PURPOSE:To impart efficient aeration action, by forming a storage pump by integrally providing a blade to the hollow interior of a cone shaped blade wheel. CONSTITUTION:A rotary conical pump 4 has a blade wheel 3 integrally having a blade 2 in the cone shaped hollow interior thereof and the lower opening part thereof is set to a water sucking port 4 while a diffuser 6 is mounted to the upper opening part 5 thereof. the pump 1 is provided so as to penetrate the water sucking port 4 into water 8 to be treated and rotated by a motor 13 in such a state that a required pump external head H is imparted between the upper edge part of the diffuser 6 and the surface of water on which water 8 to be treated is fallen. Water 8 to be treated is sucked from the water sucking port 4 and pumped up along the inner peripheral surface of the cone while receiving centrifugal force and is scattered from the upper edge of the diffuser 6 to be fallen from the opening part 9 of a water blocking chamber.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an aeration method that utilizes sewage relay pumping stations, industrial community drainage canals, domestic and industrial drainage canals, and other irrigation canals and rivers.

(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, resulting in 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 places where there is no space available, it is possible to exert a pumping action to fluidize wastewater, and at the same time add an efficient aeration action to the fluidization process, so even if the space is limited, there is no difference in aeration efficiency. The aim is to provide an aeration method that will never cause problems.

(Means for Solving the Problems) The present invention constitutes a water pump by integrally providing one blade in the hollow interior of a cone-shaped impeller whose lower part is opened, and With the water intake port submerged in the water to be treated and the required head outside 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. is rotated by a motor, and aeration is carried out in the water pumping area along the inner circumferential surface of the cone of the impeller, in the area where the water to be treated is scattered from the water outlet, and in the drop area outside the pump.

(Example) An embodiment of the present invention will be described below with reference to the drawings.

In Figure 1, 1 is a rotating conical pump (lift pump)
It has an impeller 3 having impeller blades 2 integrally inside a cone-shaped hollow interior, a lower opening thereof is ξ to the water intake port 4, and a diffuser 6 is fitted in the upper opening 5. 7 is treated water 8
It is a partition wall (fixed frame) set up inside, and a box-shaped water-shielding chamber 10 with an opening 9 on the side is connected to the upper part of the partition wall, and a diffuser 6 passes through this water-shielding chamber 10 from below. is fixedly supported. Further, the impeller 3 is rotatably supported by a hanging frame 11 hanging down from the lower surface of the water-blocking chamber 10 via a bearing 12. 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 is pumped up 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 diffuser 6 to reach the water-shielding chamber opening 8. 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 on 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-blocking chamber lO is not necessary, and the partition wall 7 may be a fixed frame that holds the pump l.

The pumping profile inside the impeller 3 is as shown in FIG. In this case, a thin conical cavity 16 is formed, and the pumping support portion 7 along the inner circumferential surface 15 of the water to be treated comes into direct contact with the air within the cavity 16. and aeration is applied.

In addition, the pumped water to be treated 8 reaches the upper edge of the diffuser 8 and is discharged into the water-shielding chamber 10 or, if there is no water-shielding chamber, directly into the air and scatters, and comes into contact with the air significantly at this scattering portion 18, and even if there is Aeration is applied.

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 the entire area from the beginning of the pumping until the end of the 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 the sewage flowing into the manhole 21 from the suction pipe 19 is pumped up and sent to the discharge pipe 20. I'm trying to send it in. In conventional small-scale sewage relay pumping stations, submersible pumps are installed in manholes and used to send sewage from the suction pipe to the discharge pipe, but this method requires separate aeration treatment of the sewage. However, according to the present invention as shown in Fig. 3, the aeration process can be carried out in the same dark place at the same time as wastewater relay. In addition, 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, so that it can be used in places where the flow is stagnant or there is no flow. However, it can add movement to the water to be treated and add an aeration effect, so 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 circumferential surface of the impeller cone, the area where the water to be treated is scattered from the water outlet, and the above-mentioned 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 (water pump) 2... Impeller 3... Impeller 4... Water inlet 6... Diffuser (water outlet) 7... Bulkhead (fixed frame) 8. ...Water to be treated 13...Motor 15...Cone inner circumferential surface 17...Pumping region 18...Scattered part H...Head patent applicant Kubota Iron Works Co., Ltd. Agent Patent attorney Takashi Suzue -Figure 1Figure 2

Claims (1)

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