JPS60190295A - Aeration apparatus - Google Patents

Abstract

PURPOSE:To enhance aeration effect by effectively dissolving gas, by providing a draft tube to the leading end of an aerator cover and integrally connecting the aerator cover and the draft tube while forming a slit to the connection part of both of them. CONSTITUTION:When the drive motor 2 of an aeration apparatus is driven, a stirring blade 5 is revolved through a stirring shaft 3 and a vortex stream is generated in a liquid while negative pressure is generated in the leading end side of the stirring shaft 3. Gas, air or other gas invaded into a cover 4 from the suction orifice 3a provided to the upper part of the hollow shaft is sucked by said negative pressure and discharged into the liquid from the air diffusion orifice 3b provided to the lower end of the hollow shaft through the interior of said shaft. The gas discharged into the liquid is formed into fine gas bubbles by the turbulent flow in the draft tube 6 to be dissolved in the liquid. The liquid reaches the lower end of the tank and then rises to be flowed into the draft tube 6 from a slit 7 and this operation is successively repeated.

Description

[Detailed Description of the Invention] The present invention relates to an aeration device, and its purpose is to connect a draft tube to the tip of the aerator cover, and provide a slit at this connection, so that a sufficient amount of air can be supplied to the entire tank. The purpose is to obtain a flow rate, efficiently dissolve gas, and improve the aeration effect.

In other words, the invention uses an aerator that stirs the fluid and supplies gas by using the negative pressure generated in the liquid, and aerates it so as to cover the outer periphery of the drive shaft to which the drive motor is connected. A machine cover is provided, and a draft tube of the required length is provided so as to place the outer periphery of the stirring blade provided at the tip of the drive shaft, and this aeration machine cover and draft tube are connected and integrated. It is characterized by forming a slit.

The present invention will be explained below based on illustrated embodiments.

In the figure, 1 indicates the entire aeration device for stirring and aerating liquid, and this aeration device 1 has a drive motor 2 and a hollow drive shaft 3.
This drive motor 2 is connected directly or through a joint.
, the drive shaft 3 is covered with an aerator cover 4, and the draft chute is arranged so that the lower end of the cover 4 covers the lower part of the drive shaft 6 and the agitation blade 5 of a desired shape provided at the end of the shaft. A professional was installed to drill a slit 7 in the connecting part between the aerator cover and the draft chive, and install this device into a tank, pond, or other stirring tank at the required depth and angle of inclination. Insert and support. In addition, the hollow drive shaft 3 is provided with a suction hole 3a in the form of a slit or a circular hole at a position above the liquid level, and the lower end of the shaft is opened at the tip of the stirring blade to remove the liquid. Medium gas (gas, air)
The suction hole 3a and the air diffusion port 3b are connected to each other by a hollow hole in the drive shaft.

The diameter of the draft tube can be set arbitrarily, but it is desirable to set the diameter within a range of 1.5 to 5 times the diameter of the stirring blade. In the illustrated embodiment, the outer circumferential diameter of the shaft part of the aerator cover is made larger, and one or more slits 7 are bored in this plate-like connecting part, but even if the slits are made into nine circles, other It may also be a shape.

Drive motor 2 of the vA device 1 configured as described above
When the stirring blade 5 is driven, the stirring blade 5 rotates through the stirring shaft 3, and a vortex is generated in the liquid, and the tip 8 of the stirring shaft is rotated.
Negative pressure is generated in 1, and this negative pressure sucks gas, air, and other gases that enter the cover 4 through the suction hole 3a in the upper part of the hollow stirring shaft, and It is then discharged into the liquid through the air diffuser hole 5b at the lower end of the shaft. The gas released into the liquid becomes fine bubbles due to the turbulent flow in the draft tube and dissolves into the liquid. Further, the liquid flow rises after reaching the lower surface of the tank, flows into the trough tip through the slit 7, and repeats this process one after another.

As a result, the liquid is sufficiently stirred in the lower layer of the stirring blade, and gas is mixed and dissolved.

By guiding the mineral liquid flow through the draft tube according to the present invention, a sufficient flow rate can be given to the bottom of the aeration tank, and air bubbles can reach the entire tank to bring about a uniform aeration effect, and the draft tube This has the advantage that the air bubbles become finer due to the water flow, improving oxygen dissolution efficiency.

[Brief explanation of drawings]

FIG. 1 is an external view, and FIG. 2 is a sectional view. 1...Aeration device 2...Drive motor 3... Drive shaft 3a...Suction hole 3b...Aeration port 4...Aerator cover 5... Stirring blade 6...Draft tube 7...Slit Patent applicant: Hitachi Kiden Industries, Ltd. Agent Ike 1) Mikio 1 other person (

Claims (1)

[Claims] In an aerator that stirs liquid and supplies gas by using the negative pressure generated in the liquid, an aerator cover is installed so as to go around the outer periphery of the drive shaft connected to the drive motor. A trough tube of the required length is provided so as to extend around the outer periphery of the stirring blade provided at the tip of the drive shaft. An aeration device consisting of slits.