JPS6314897Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" The present invention relates to the structure of an agitator used, for example, in a water treatment reaction tank, adjustment tank, aeration tank, or the like.

``Prior art'' and ``Problems to be solved by the invention'' Conventionally, in the reaction tank, adjustment tank, or aeration tank described above, a propeller consisting of simple blades was attached to a rotating shaft with both ends fixed, or A stirrer attached to the tip is used. According to the above-mentioned agitator, when stirring wastewater from the above-mentioned reaction tank, etc., which has a lot of sediment and foreign matter, rotation caused by catching foreign matter, breakage of blades due to contact with foreign matter, or stirring resistance. The problem is that rotational balance is likely to be lost due to shaft deflection, resulting in mechanical instability, resulting in strong vibrations and mechanical failure.

Therefore, according to the conventional agitator structure described above, even if both ends of the rotating shaft are fixed with bearings, the length of the propeller rotating shaft is mechanically limited, and it may not be possible to sufficiently stir the deep tank. Moreover, in a sewage tank or the like where there is a large amount of sediment, there are disadvantages such as insufficient stirring performance.

The purpose of the present invention is to provide a new agitator structure that overcomes the above-mentioned conventional difficulties.

``Means for Solving the Problems'' The present invention, which achieves the above-mentioned objectives, is based on the following description: ``A guide tube ring 6 is attached to a rotating shaft 1 having a flexible joint 2'' with reference to FIG. 1 showing its basic concept. The guide cylinder ring 6 is arranged concentrically with the rotating shaft 1, and is fixed to the outer periphery or near the outer periphery of the blade body of the propeller 3. Specifically, the propeller 3 having the guide tube ring 6 (hereinafter referred to as the propeller with tube ring 3) is composed of a propeller body 4 having a plurality of ordinary "twisting blades" 5 and a propeller body 4 having a plurality of normal "twisting blades" 5, as shown in FIGS. 1C and 1D. It has a structure in which a guide cylinder ring 6, which is a short and small cylindrical ring, is fixed to the outer periphery of the body 4 or near the outer periphery in a concentric manner with the rotating shaft 1.
The twisting blades 5 are made up of 2 to 6 blades or the like and have an arbitrary twisting direction. The above propeller with cylinder ring 3 is used as a stirrer by being combined with a normal propeller 7 (hereinafter simply referred to as propeller 7) or attached alone to the same rotating shaft 1.

"Function" According to the agitator of the present invention having the above configuration, when the propeller with cylinder ring 3 rotates, the guide cylinder ring 6 functions as a guide cylinder, and the liquid flow generated by the rotation of the blades 5 is directed to the direction indicated by the arrow in the figure. As shown in FIG. 2, there is an effect of generating an axial flow that flows through the guide cylinder ring 6 as an upward flow or a downward flow along the rotating shaft 1. Therefore, the axial flow physically stabilizes the axis of the rotating shaft 1, and the liquid to be stirred flows in the vertical direction, thereby further improving the stirring effect.

Furthermore, the guide cylinder ring 6 acts as a guard for the blades 5 to prevent damage to the blades 5 due to contact with foreign objects, etc., and also has an axial center stabilizing effect as an annular rotating body, so that the rotating shaft due to the above-mentioned axial flow Combined with the stabilizing effect of , the rotational axis of the rotating shaft 1 becomes extremely stable.

Therefore, the rotating shaft 1 of the present invention does not need to have a structure in which both ends are fixed as in the conventional structure, and the rotating shaft 1 is provided in a suspended manner through the flexible joint 2 as shown in the figure.
Since the lower end of the rotary shaft 1 can be configured as a free end, there is no mechanical restriction on the length of the rotary shaft 1, and a large number of propellers 3 with cylindrical rings are arranged in a multi-stage configuration on the long axis, which provides effective stirring in deep tanks. There are benefits that can be expected.

"Example" Hereinafter, embodiments of the present invention will be cited and explained.

First, Fig. 2 shows an application to a reaction tank 9 for sewage with a lot of coagulated sediment, in which propellers 3 with cylindrical rings are attached in multiple stages to a rotating shaft 1 with a long axis suspended in the vertical direction. A propeller 7 is interposed between the cylindrical propellers 3' and 3'', and the twist directions of the blades of the cylindrical propellers 3' and 3'' are opposite to each other. According to the stirrer of this embodiment, opposing axial flows are generated by the propellers 3' and 3'' with cylindrical rings, and the opposing axial flows are turbulently diffused by the propeller 7, so that it is extremely effective. A stirring effect can be expected. In the figure, 10 is a raw water pipe, and 11 is a chemical pipe.

FIG. 3 shows an embodiment applied to an aeration tank 12 for sewage.
is suspended, and on the rotating shaft 1, propellers 3 with cylinder rings and propellers 7 are arranged in multiple stages alternately. This stirrer has the effect of not only actively stirring the wastewater up and down, but also activating the aeration effect based on the axial flow near the liquid surface. 13 in the figure is an exhaust hole.

Next, FIG. 4 shows an application to a donut-shaped aeration tank 15 having a settling tank 14 in the center. Ringed propellers 3 and propellers 7 are arranged alternately in multiple stages. The above-described agitator promotes liquid circulation within the aeration tank 15 and can be expected to improve the aeration effect.

Figure 5 shows a system in which a rotating shaft 1 is hung vertically on one side of a rectangular aeration tank 16 with a rectangular cross section, and propellers 3 with cylinder rings and propellers 7 are arranged in multiple stages alternately with the rotating shaft 1 as the long axis. This is an embodiment in which a swirling flow is generated between the diffuser tube 17 on the other side and foaming of the liquid is defoamed by the propeller 3 with a cylindrical ring.

Fig. 6 shows an embodiment of the oxidation date method in which a pair of agitators are arranged symmetrically in the aeration tank 18, each of which is installed in an inclined manner with the rotating shaft 1 as the long axis, and is attached with a cylindrical ring. A large number of propellers 3 and 7 are installed in combination.

According to this embodiment, since the rotating shaft 1 is elongated, the aeration tank 18 can be made deeper than in the conventional structure, and the pair of agitators activates the circulation inside the tank, making it effective. Aeration effect can be achieved.

In addition, Fig. 7 shows an example applied to an anaerobic digestion tank 19 for sewage, etc., and a propeller 7 is installed near the upper end of the rotating shaft 1.
are attached, and below the propeller 7 only the propellers 3 with cylindrical rings are arranged in multiple stages. According to this embodiment, the sediment at the bottom of the tank can be rolled up by the cylinder-ring propeller 3, thereby promoting the digestive action.

In each of the stirrers of the above embodiments, a rotary shaft 1 is suspended with a flexible joint 2 such as a universal joint interposed therebetween, and the rotary shaft 1 operates with its lower end as a free end. Mechanically stable rotational operation is possible based on the shaft center stabilizing effect.

In addition, the stirrer of the present invention has the following features in addition to the above embodiments:
Although not shown, propellers 3 with cylindrical rings are attached in multiple stages to a long rotating shaft and rotated by wind power, and applied to moving exchange of ring water and bottom water, stirring aeration, etc. in fish farms, lakes, stagnant rivers, and inner bays. It can be effectively applied to a wide range of liquid agitation, aeration, reflux, defoaming, etc., such as use in sewage adjustment tanks, etc.

"Effects of the invention" As described above, the stirrer structure of the present invention has extremely diverse application areas, and is mechanically stable and further improves the stirring performance of each.
This has many effects, such as making it possible to lengthen the rotating shaft for stirring, and expect effective and uniform stirring even in deep tanks.

[Brief explanation of drawings]

Figure 1: Shows the basic structure of the stirrer of the present invention, A
is its front view, B is its top view of the propeller 7,
C and D are plan views of the propeller 3 with guide cylinder ring, FIG. 2, FIG. 3, FIG. 4, FIG. 5, FIG. 6, and FIG. 7.
Figures: Examples of the present invention are shown in Figures 2 and 3.
Figures 5 and 7 are front views, Figures 4 and 6.
The figure is its plan view. Main symbols: 1: Rotating shaft, 2: Flexible joint, 3: Propeller with guide tube ring, 5: Blade, 6: Guide tube ring,
7: Propeller.

Claims (1)

[Scope of utility model registration request] A propeller having a guide cylinder ring is attached in multiple stages to a long axis of rotation having a flexible joint, and the guide cylinder ring is arranged concentrically with the rotation axis and extends around the outer periphery of the blade body of the propeller. Or a stirrer structure characterized by a structure fixed near the outer periphery.