JPS6152755B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an aeration device for oxidation dates.

As a type of aeration device for oxidation dates, it has a rotor consisting of a large number of blades attached around a rotating shaft, and the lower end of the rotation path of the blades is placed below the water surface of the oxidation date. Set,
Some types perform aeration and stirring by rotating blades. However, in this type of conventional aeration device, the rotating shaft is supported only so as to rotate, and the submerged depth of the blade body is constant, so that the aeration and stirring capabilities cannot be varied. Therefore, when performing nitrification treatment under aerobic conditions and denitrification treatment under anaerobic conditions simultaneously or alternately in the same oxidation date, it is difficult to create favorable conditions for both. However, since the rotor position is generally set to suit the nitrification process, there has been a problem that the denitrification process is not carried out satisfactorily.

In view of the above points, the present invention aims to provide an aeration device for an oxidation date whose aeration and stirring capabilities can be varied.

That is, the present invention comprises a main shaft disposed horizontally across a waterway, an arm fixed to the main shaft and capable of vertically swinging around the main shaft by rotation of the main shaft, and one end of this arm. a balance weight attached to the other end of the arm; a swing drive device that rotates the main shaft and swings the arm by rotation of the main shaft; and a swing drive device that swings the arm by rotating the main shaft. a guide rail formed in an arc shape centered on the center and guiding the swinging of the one end side of the arm; a first sprocket provided concentrically with the main shaft; and a first sprocket provided so as to be rotatable integrally with the rotor. It is characterized by having an endless chain that extends over the second sprocket and transmits the rotational driving force from the first sprocket to the rotor. By changing the submersion depth, the aeration and stirring capacity can be varied and the desired aerobic and anaerobic conditions can be created, making it possible to carry out efficient treatment regardless of changes in BOD load, etc. Not only that, but because it is a swing type rotor attached to a swinging arm with a balance weight, the rotor position can be precisely controlled with only a small amount of driving force.

An embodiment of the present invention will be described below based on the drawings. In FIGS. 1 to 3, reference numeral 1 denotes a main shaft disposed horizontally across a waterway 2 of the oxidation date, and this main shaft 1 is connected to a frame 3a erected on both sides of the waterway 2. , 3b on bearing 4a,
Both ends are rotatably supported by 4b.
The intermediate portions of arms 5a and 5b are fixed to the main shaft 1 at positions above both widthwise ends of the water channel 2, and a rotor 6 is attached to one end of the arms 5a and 5b.
Both ends of a rotating shaft 7 are rotatably supported via bearings (not shown), and both ends of a balance weight 8 are fixed to the other end. A cover 9 covers the upper half of the rotor 6. Both ends of the cover 9 are swingably connected to one ends of rods 10a and 10b parallel to the arms 5a and 5b. , 10b are connected to the brackets 11a, 11b on the frames 3a, 3b.
It is supported so that it can swing freely. The rotating shaft 7 passes through holes formed in both side walls of the cover 9, and connects one end of the arms 5a, 5b with the rod 10.
One end portions of a and 10b are connected to each other by a link (not shown). The arms 5a, 5b
Wheels 13a, 13b are rotatably supported at one end via brackets 12a, 12b, and these wheels 13a, 13b are supported by arms 5a, 5.
It fits into arc-shaped guide rails 14a and 14b centered around the rotation center of b. On the pedestal 3a are an electric motor 15 with a continuously variable transmission, a double clutch 16, cyclo reducers 17, 18, chain couplings 19, 20, 21, and a bearing 2.
2 and 23 are installed, and the output shaft of the electric motor 15 is connected to the input shaft of the double clutch 16 via a chain coupling 19. There is a V pulley between the V pulley 24 which is externally fixed to one output shaft of the double clutch 16 and the V pulley 25 which is externally fixed to the input shaft of the cyclo reducer 17.
A belt 26 is stretched, and the output shaft of the cyclo reducer 17 is connected to the main shaft 1 via a chain coupling 20. A V-pulley 27 is externally fixed to the other output shaft of the double clutch 16, and a V-pulley 29 is externally fixed to a shaft 28 which is rotatably supported by bearings 22 and 23.
A V-belt 30 is stretched between the shaft 28 and the shaft 28, and the shaft 28 is connected to the input shaft of the cyclo reducer 18 via a chain coupling 21. A pair of sprockets 31 and 32 that are integrally connected to each other are rotatably fitted onto the main shaft 1, and one sprocket 31 and the cyclo reducer 18
A chain 34 is suspended between a sprocket 33 externally fixed to the output shaft of the rotary shaft 7, and a chain 36 is suspended between the other sprocket 32 and a sprocket 35 externally fixed to the rotating shaft 7. It is hung. Note that 37 in FIG. 1 is a brake with a push-up machine, and 42 in FIG. 3 is a rainproof cover.

As shown in FIG. 4, the rotor (6) includes the rotating shaft 7, a plurality of circular plates 38 externally fitted and fixed to the rotating shaft 7 at appropriate intervals in the axial direction, and each adjacent circular plate. A plurality of support rods 39 are fixed at appropriate intervals in the circumferential direction between the plates 38, 38, and a large number of plate-shaped blade bodies 40 are fixed to each of these support rods 39 at appropriate intervals in the longitudinal direction. It consists of
The number of support rods 39 is plural (three in this embodiment).
are arranged in a straight line parallel to the rotating shaft 7. The support rods 39 of each set are shown in the drawing as being provided every 90 degrees in the circumferential direction, but this is to make the drawing easier to understand, and in reality there are many (for example, every 30 degrees). ) is provided. Note that 41, 41 is a circular drain plate.

In the above configuration, while the rotor 6 is operating, the output of the electric motor 15 is transmitted to the chain coupling 19, double clutch 16, V pulley 27, V belt 30,
V pulley 29, shaft 28, chain coupling spring 2
1. It is transmitted to the rotating shaft 7 via the cyclo reducer 18, sprocket 33, chain 34, sprockets 31, 32, chain 36, and sprocket 35, and the rotor 6 rotates. When the double clutch 16 is switched, the output of the electric motor 15 is switched from being transmitted to the V-pulley 27 to being transmitted to the V-pulley 24, and the output is transferred to the V-belt 26, the V-pulley 25, the cyclo reducer 17, and the chain coupling. It is transmitted to the main shaft 1 via 20. Therefore, the rotation of the rotating shaft 7 is stopped, and the main shaft 1
Due to the rotation of the rotor 6, the guide rails 14a, 1
4b and rotates around the axis of the main shaft 1.
At this time, the cover 9 moves together with the rotor 6 while maintaining its downward position by a pair of link mechanisms constituted by arms 5a, 5b, rods 10a, 10b, and links. This state of movement is shown in FIG. 3 by imaginary lines. When the double clutch 16 is switched, the rotation of the rotor 6 is stopped and the rotating shaft 7 is rotated again.

In this way, since the depth of submersion of the rotor 6 can be freely varied by raising and lowering the rotor 6, the aeration capacity and stirring capacity of the rotor 6 can be set arbitrarily. That is, by partially submerging the rotor 6 and rotating the rotating shaft 7, a large number of blade bodies 40 strike the water surface, and at this time, oxygen in the air dissolves into the water to obtain an aeration effect. The stirring effect is obtained by rotating the underwater part of the body 40,
When the rotor 6 is gradually lowered from the position where the aeration capacity is maximum, the aeration capacity gradually decreases and the stirring capacity increases, and when the rotor 6 is completely submerged in water, the aeration capacity disappears and only the stirring capacity remains. Become. Therefore, for example, if a dissolved oxygen concentration meter (hereinafter referred to as a DO meter) is installed at a suitable location in the waterway 2, and the rotor 6 is raised or lowered in accordance with the signal from this DO meter, the optimum preference can be achieved. Air conditions and anaerobic conditions can be created, and nitrification and denitrification of wastewater can be efficiently performed regardless of changes in BOD load.

In the above embodiment, an example was explained in which the rotation of the rotary shaft 7 and the rotation of the main shaft 1 were performed by one electric motor 15, but it is of course possible to perform the rotation by separate electric motors. It is.

Further, in the above embodiment, as the rotor 6,
Although the example in which the support rod 39 is arranged parallel to the axis of the rotating shaft 7 has been described, the support rod 39
A rotor may be used in which the rotor is arranged along a straight line at a twist position that makes a predetermined angle with respect to the axis of the rotating shaft 7. If such a rotor is used, each blade body 40 will hit the water surface in sequence, so the impact applied to the rotating shaft 7 can be alleviated, and the generation of noise can be reduced, which is preferable.

As explained above, according to the aeration device for oxidation date according to the present invention, the submersion depth can be changed by raising and lowering the rotor, so the aeration and stirring capacity can be varied, and the desired level can be achieved. Since it is possible to create aerobic and anaerobic conditions,
Not only is it possible to perform wastewater treatment efficiently and well regardless of BOD load fluctuations, etc., but because it is a swing type with a rotor attached to a swinging arm with a balance weight, only a small amount of driving force is required. allows fine control of the rotor position.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which FIG. 1 is a plan view, FIG. 2 is a front view, FIG. 3 is a side view, and FIG. 4 is a front view of the rotor. 6... Rotor, 7... Rotating shaft, 15... Electric motor, 40
...feather body.

Claims (1)

[Claims] 1 A main shaft arranged horizontally across a waterway, an arm fixed to this main shaft and able to swing up and down around this main shaft by rotation of this main shaft, and an arm attached to one end of this arm. a balance weight attached to the other end of the arm; a swing drive device that rotates the main shaft and swings the arm by the rotation of the main shaft; a guide rail formed in an arc shape to guide the swinging of the one end side of the arm; a first sprocket provided concentrically with the main shaft; and a second sprocket provided so as to be rotatable integrally with the rotor. 1. An aeration device for an oxidation date, characterized in that it has an endless chain that extends over the first sprocket and transmits the rotational driving force from the first sprocket to the rotor.