JPS6152756B2 - - Google Patents

Description

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

In an oxidation system that aerates inflowing wastewater and then flows it down to a settling tank, the aeration device has a rotor with a large number of blades attached around a rotating shaft, and the height of the blades is Some systems have a fixed position, the lower end of the blade is set below the water surface, and the rotation of the blade performs aeration and stirring. However, in oxidation dates equipped with such aeration equipment, if the water level inside the date fluctuates due to daily fluctuations in the amount of inflowing wastewater, overaeration and DO deficiency may occur, making it difficult to perform proper aeration. In extreme cases, there is a problem that the rotor may spin idle or be submerged in water. In addition, in the initial stage immediately after the facility is installed, it is common for only a small amount of wastewater to flow in compared to the treatment capacity, and in this case as well, the water level in the deitsch tank should be lowered from the specified position to increase the deitsch tank capacity. The lower the amount, the lower the power required for stirring and the more energy-saving operation can be achieved. On the other hand, if the water level is fixed, there is a problem in that more power than necessary must be input into the Deitzch tank at the time of initial use.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an aeration system for an oxidation date (swing type horizontal shaft rotating rotor) that allows the rotor position to follow changes in the water level within the date.

To achieve this object, the present invention includes a main shaft disposed horizontally across a waterway, an arm fixed to the main shaft and swingable up and down around the main shaft by rotation of the main shaft, A rotor and a cover of this rotor attached to one end of the arm, a balance weight attached to the other end of the arm, a first sprocket provided concentrically with the main shaft, and a rotor that can rotate together with the rotor. An endless chain that extends over the provided second sprocket and transmits the rotational driving force from the first sprocket to the rotor; a water level detection device attached to the cover; an elevating drive device that rotates the main shaft in response to a signal, swings the arm by the rotation of the main shaft, and raises and lowers the rotor so that the depth of submergence of the rotor is constant; The guide rail is formed in an arc shape and guides the swinging of the one end of the arm.

Therefore, the rotor can be raised and lowered in accordance with the rise and fall of the water level in the water tank, and the submersion depth of the rotor can always be kept at an appropriate constant value, regardless of changes in the water level. Since the amount of oxygen supplied is constant and the amount of oxygen can be supplied that matches the amount of oxygen required, it is possible to perform good treatment without causing overaeration or insufficient DO. Since it is a swing type with a rotor attached to a swing arm, it is possible to precisely control the rotor position with 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. It is composed of a plurality of support rods 39 fixed at appropriate intervals in the circumferential direction between 38 and 38, and a large number of plate-shaped blade bodies 40 fixed to each of these support rods 39 at appropriate intervals in the longitudinal direction. has been done.
The support rods 39 are twisted in the same direction with respect to the rotating shaft 7, respectively. In addition,
41, 41 are annular drainage plates at both ends of the rotor 6.

A three-needle liquid level gauge 43 serving as a water level detection device is attached to the cover 9 via a horizontal bracket 42. A signal line 44 from the three-needle liquid level gauge 43 is connected to a control device 45 that controls a lifting drive device such as an electric motor 15. 46 is a signal line between the control device 45 and the lifting drive device.

In the above configuration, the output of the electric motor 15 is connected to the chain coupling 19, the double clutch 16, and the V
Pulley 27, V belt 30, V pulley 29, shaft 2
8, chain coupling 21, cyclo reducer 18, sprocket 33, chain 34, sprockets 31, 32, chain 36, and sprocket 35 to be transmitted to the rotating shaft 7, and the rotor 6
is rotated.

The submersion depth of the rotor 6 is always set to a required appropriate value based on the output signal from the three-needle liquid level gauge 43. That is, when the water level fluctuates due to the reasons mentioned above, the three-needle liquid level gauge 43 detects this, and
By switching the double clutch 16, the output of the motor 15 is changed from the state where the output is transmitted to the V pulley 27 to the V pulley 2.
4. Then, the output of the electric motor 15 is transmitted to the main shaft 1 via the V belt 26, V pulley 25, cyclo reducer 17, and chain coupling 20, the rotation of the rotating shaft 7 is stopped, and the rotation of the main shaft 1 causes the rotor to rotate. 6 is guided by guide rails 14a and 14b and rotates around the axis of 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 the arms 5a, 5b, the rods 10a, 10b, and the link. Further, at this time, the three-needle liquid level gauge 43 also moves together with the cover 9. As a result, the rotor 6
When the submersion depth reaches the appropriate value, this is detected by the three-needle liquid level gauge 43, and the double clutch 16 is re-engaged.
to rotate the rotor 6.

As described above, according to the present invention, the rotor 6 moves up and down in accordance with changes in the water level, and its submersion depth is always maintained at the required appropriate value, so that good aeration and stirring conditions are always achieved. It will be done. Further, load fluctuations on the electric motor 15 can also be suppressed to a small level. When the work is completed, the main shaft 1 is rotated again to raise the rotor 6 and retract it to a position above the water surface shown by the imaginary line in FIG. 3.

In the above embodiment, an example was explained in which the rotation of the rotating shaft 7 and the rotation of the main shaft 1 were performed by one electric motor, 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,
The support rod 39 is arranged along a straight line at a twisted position that makes a predetermined angle with respect to the axis of the rotating shaft 7, and each blade body 40 hits the water surface in turn, so that the supporting rod 39 is attached to the rotating shaft 7. Although we have described an example in which the applied impact is alleviated and noise generation is reduced, in the case where there is no such fear, it is possible to use a rotor in which the support rod 39 is arranged parallel to the axis of the rotating shaft 7. May be used.

As described above, according to the present invention, the rotor can be raised and lowered according to the rise and fall of the water level in the date, and the submersion depth of the rotor can always be kept at an appropriate constant value, so that it can be adjusted to changes in the water level. Regardless of the situation, the amount of oxygen supplied remains constant and the amount of oxygen that matches the amount of oxygen required can be supplied, which not only makes it possible to perform good treatment without causing overaeration or lack of DO, but also allows for a shaker with a balance weight. Since it is a swing type with a rotor attached to a dynamic arm, it is possible to precisely control the rotor position with a small amount of driving force.

[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 (elevating drive device), 40...Blade body, 43...Three needle type liquid level gauge (water level detection device), 45...Control device.

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 rotor, a cover of this rotor, a balance weight attached to the other end 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. an endless chain that is hung across and transmits the rotational driving force from the first sprocket to the rotor; a water level detection device attached to the cover; and a signal from the water level detection device to rotate the main shaft; an elevating drive device that swings the arm by rotation of the main shaft and raises and lowers the rotor so that the depth of submergence of the rotor is constant; An aeration device for an oxidation date, comprising a guide rail that guides the swinging of the one end of the arm.