JPS641039Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] This invention relates to an aerator, particularly an aerator for aeration using an activated sludge method.

[Prior art]

This type of aerator consists of an air supply pipe that supplies compressed air into the liquid in the aeration tank, and an underwater agitator that stirs the liquid in the aeration tank. The underwater agitator mentioned above is usually
It consists of an underwater motor including a speed reduction mechanism, a casing attached to the underwater motor, and an impeller housed within the casing and driven by the underwater motor.

However, the conventional aerator has the drawback that it is quite troublesome to align the air outlet of the air supply pipe with the air suction of the submersible agitator and connect them within the aeration tank.

[Summary of the idea]

This idea was made in order to eliminate the above-mentioned drawbacks of the conventional method.The underwater agitator is supported by its own weight on the upward-facing end of the air supply pipe installed in the aeration tank, with its center of gravity on the vertical line. Accordingly, it is an object of the present invention to provide an aerator in which an air supply pipe and a submersible agitator can be easily and reliably connected in an aeration tank by aligning their respective air discharge ports and air intake ports.

[Example of idea]

Hereinafter, one embodiment of this invention will be described in detail based on the drawings. In the figure, 1 is a base fixed to the bottom surface of the aeration tank 2, and 3 and 4 are air supply pipes and guide columns that also serve as guide columns and are erected on both sides of the upper surface of the base. Reference numeral 5 denotes an L-shaped tube connected to the lower branch portion 3a of the air supply tube 3, with the upward tube end surface 5a serving as the attachment/detachment surface for the underwater agitator 6.

The underwater agitator 6 includes an underwater motor 7 including a speed reduction mechanism, a casing 10 fixed to the underwater motor 7 and having a processing liquid suction port 8 at the upper part and a gas-liquid mixed liquid discharge port 9 at the lower part, and a casing 10 housed within the casing 10. By being driven by the underwater motor 7,
The impeller 11 sucks the processing liquid through the processing liquid suction port 8 and discharges it from the gas-liquid mixed liquid discharge port 9.

Reference numeral 12 denotes a pipe portion protruding from the lower surface of the casing 10 on the vertical line of the center of gravity of the underwater agitator 6, reference numeral 13 denotes a connecting body which is screwed onto the lower end of the pipe portion 12 and opens in the shape of a flap at the lower part, and reference numeral 14 denotes an L. Watertight packings 15a and 15b made of an elastic material such as rubber fitted to the outer periphery of the upward end of the double tube 5 are provided on the upper surface of the underwater motor 7 so as to protrude from side to side, and their tips are connected to the air supply pipe 3 and the guide column 4. The positioning guide piece 16 that comes into contact with and positions the submersible motor 7 is a hook for a lifting chain 17 that is attached to the upper surface of the underwater motor 7 via guide pieces 15a and 15b.

Since this invention has the above-mentioned configuration, the underwater agitator 6 is suspended from the lifting chain 17, and the guide piece 15 is suspended from the lifting chain 17.
When the connecting body 13 is lowered from the position shown by the two-dot chain line in which the air supply pipe 3 and the guide column 4 are brought into contact with each other and positioned, the connecting body 13 securely connects the upward end of the L-shaped pipe 5 with its flap-shaped opening. The submersible agitator 6 is supported by its own weight on the above-mentioned upward end surface, and at the same time, the air supply path is connected to the submersible agitator.

In this state, due to the pump action caused by the rotation of the impeller 11 driven by the submersible motor 7, the processing liquid 18 is sucked in from the processing liquid suction port 8 at the top of the casing, and is vigorously discharged from the gas-liquid mixed liquid discharge port 9 at the bottom of the casing. be done. At this time, air is supplied into the casing 10 from the air supply pipe 3 via the L-shaped pipe 5 due to the pressure reduction effect due to the vigorously discharged liquid flow and the pressure of a blower (not shown) connected to the air supply pipe 3. Ru. This air is drawn into the liquid flow, forms fine bubbles, and is discharged out of the casing from the discharge port 9 in the radial direction as a gas-liquid mixture.

During maintenance and inspection, the submersible agitator 6 is moved from the aeration tank 2 by hooking the hook 17a of the elevating chain 17 to the hook hook 16 and hoisting the elevating chain 17 using a hoist (not shown). You can take out more.

[Effect of idea]

As described above, according to this invention, the upward end of the air supply pipe installed in the aeration tank is used as the desorption surface, and the connecting body provided on the vertical line of the center of gravity of the underwater agitator is fitted onto this desorption surface. Since the submersible agitator is held together by its own weight, the air supply pipe and the submersible agitator can be easily and quickly attached and detached in the liquid. Furthermore, since the underwater agitator can be taken out of the aeration tank, maintenance and inspection of the mechanical part are easy. Furthermore, since the attachment/detachment part of the underwater agitator is located vertically below the center of gravity of the machine, the adhesion/detachment part is securely attached and held, and mechanical vibrations are less likely to be transmitted to other parts.

[Brief explanation of the drawing]

The drawing is a longitudinal sectional front view of an aerator showing an embodiment of this invention. 2 is an aeration tank, 3 is an air supply pipe,
6 is an underwater stirrer, 7 is an underwater motor, 8 is a processing liquid suction port, 9 is a gas-liquid mixed liquid discharge port, 10 is a casing, 11 is an impeller, and 13 is a connecting body.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) An air supply pipe installed in an aeration tank with the upward end of the pipe serving as a desorption surface, a submersible motor, and a processing liquid suction port attached to the submersible motor at the top and a processing liquid suction port at the bottom. A submersible agitator consisting of a casing having a gas-liquid mixed liquid discharge port and an impeller housed within the casing and driven by the submersible motor; an aerator, the connecting body being connected to the tube end and fitting into the upward tube end to support the underwater agitator by its own weight on the tube end. (2) The aerator according to claim (1) of the utility model registration, in which the lower part of the connecting body expands in a truss shape.