JP2003236577A - Aeration agitator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an aeration agitator to easily select and efficiently perform an aerobic operation in which air is supplied under water and an anaerobic operation in which the air is not supplied under water, with one motor. <P>SOLUTION: The aeration agitator has a mount base provided with the main body of a aeration machine in which a blade 7b for agitation is attached to an agitation shaft 6 rotationally driven by a motor 8, and a cylindrical body 5 arranged so as to cover the outer periphery of the agitation shaft 6. The aeration agitator includes the blade 7b for agitation always driven by the motor 8, and a blade 7a for aeration selectively driven by the motor 8 through a clutch mechanism 9. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an aeration and agitation device, and more particularly to an aerobic operation (aeration operation) for supplying air (oxygen) into water and an anaerobic operation (agitation operation) for not supplying air (oxygen) into water. ) And (3) relate to an aeration stirring device that can be easily performed by switching the clutch mechanism.

[0002]

2. Description of the Related Art Conventionally, when performing sewage treatment by alternately switching between aerobic operation that supplies air into water and anaerobic operation that does not supply air into water, an aerator is installed near the water surface of a sewage treatment tank. Then, during aerobic operation, the rotating shaft driven by the electric motor is raised and rotated in one direction to suck up the dirty water and scatter the dirty water like a fountain to drop it into the water. Aeration (aeration) is carried out by sending in air, while at the time of anaerobic operation, the rotating shaft is lowered and rotated in the opposite direction to generate a water flow in the dirty water to perform stirring.

[0003]

By the way, in the above conventional aeration and agitation device, when switching between aerobic operation and anaerobic operation, in addition to switching the rotational direction of the rotary shaft driven by the electric motor, At the time of air operation, it sucks up the sewage and scatters it around like a fountain.On the other hand, at the time of anaerobic operation, a water flow is generated in the sewage.
There is a problem in that the structure for the aerator is complicated because an elevating mechanism for elevating the rotating shaft with the stirring blades attached is required.

In view of the problems of the above conventional aeration and agitation device, the present invention simplifies an aerobic operation in which air is supplied into water and an anaerobic operation in which air is not supplied into water by one electric motor. It is an object of the present invention to provide an aeration and agitation device that can be selected and efficiently performed.

[0005]

In order to achieve the above object, the aeration and agitation apparatus of the present invention comprises an aerator main body having an agitator blade attached to an agitator shaft which is rotationally driven by an electric motor, and an outer periphery of the agitator shaft. In an aeration agitating device having a mount and a cylindrical body arranged to cover the aeration agitating blade, which is constantly driven by an electric motor, and an aeration blade which is selectively driven by the electric motor via a clutch mechanism. It is characterized by being configured with.

This aeration and agitation device is constructed such that the aeration blade is selectively driven by the electric motor through a clutch mechanism separately from the agitation blade that is constantly driven by the electric motor, and the clutch mechanism is operated. Since the aerobic operation and the anaerobic operation are switched, it can be driven by a single fixed electric motor, which simplifies the configuration and, by operating the clutch mechanism during aerobic operation, the stirring blades can be used. At the same time as stirring the sewage in the tank, the aeration blades feed the sewage into the cylinder, and then continuously disperse the sewage around the outside of the cylinder like a fountain and send the air into the water by dropping the sewage to cause aeration Aerobic operation can be performed easily.On the other hand, during anaerobic operation, simply disconnect the clutch mechanism to stop the aeration blades and rotate only the stirring blades. It is possible to perform only stirring without blowing air into the.

In this case, the stirring blade can be attached to the lower end of the stirring shaft which is rotationally driven by the electric motor arranged on the mounting base.

Thus, by driving the electric motor, the stirring blades are always driven to rotate, and the sewage can be surely stirred regardless of the presence or absence of aeration.

Further, the aeration blades can be rotatably hung on a mounting base and can be attached to the outer periphery of a cylindrical aeration shaft into which a stirring shaft can be inserted.

As a result, since the stirring shaft can be supported coaxially and easily by the aeration shaft having the aeration blade, there are few failures and maintenance of the aeration blade can be easily performed.

Further, the clutch mechanism may be attached to the stirring shaft side, selectively engaged with the aeration shaft, and configured to transmit the rotational force to the aeration shaft.

As a result, the rotation drive and stoppage of the aeration shaft can be switched only by operating the clutch, which simplifies the device and operation, reduces failures, and facilitates maintenance.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the aeration stirring apparatus of the present invention will be described below with reference to the drawings.

1 and 2 show an embodiment of the aeration stirring device of the present invention. FIG. 1 shows a state in which the aeration and agitation device B is installed in a wastewater treatment tank having a required shape to perform anaerobic operation, and FIG. 2 shows a state in which aerobic operation is performed.

By the way, the sewage treatment tank in which the aeration and agitation device B is installed is not particularly limited, but it is a generally used rectangular shape for treating sewage and has a required capacity. The stirring device B is installed so as to be fixed to a predetermined position of this sewage treatment tank, for example, to the mounting base 1 installed above the sewage treatment tank at the central portion, whereby the aeration or stirring of sewage in the entire sewage treatment tank is uniform. To be able to.

As shown in the figure, this aeration and agitation apparatus B has a stirring shaft 6 which is constantly driven to rotate by an electric motor 8 mounted on a mounting base 1 installed above a sewage treatment tank. A cylindrical aeration shaft which is inserted through a stirring element configured by mounting a stirring blade 7b and a cylindrical body 5 vertically installed on the mounting base 1 and rotatably vertically installed via a rotary bearing, for example, a thrust bearing 2. 3, an aeration element configured by attaching aeration blades 7a, and a clutch mechanism 9 attached to the stirring shaft 6 so that the aeration shaft 3 is selectively driven to rotate together with the stirring shaft 6.

In this stirring element, an electric motor 8 capable of switching one direction or a rotating direction is attached to a mounting base 1, and a shaft coupling 13 also serving as a clutch is fixed to a shaft of the electric motor 8. This shaft coupling 13
Is connected to a stirring shaft 6 having a length reaching a predetermined depth in water, and a stirring blade 7b is attached to a lower end portion thereof, and the lower end of the shaft coupling 13 further penetrates the stirring shaft 6 into a central portion. The clutch mechanism 9 is fixed and configured. The stirring shaft 6 is not particularly limited, and may be pipe-shaped or solid. Further, although the stirring blade 7b has a screw shape in the illustrated embodiment, it is not limited to the illustrated one as long as it can efficiently stir the waste water in the tank.

Further, the clutch mechanism 9 is attached to the shaft joint 13 and, in detail, the electric motor, that is, the clutch mechanism 9 always rotates when the shaft joint 13 rotates, and transmits the rotational force to the aeration shaft side during operation. However, it is not particularly limited.

The aeration element has a cylindrical shape which is rotatably mounted on a mounting base 1 via a rotary bearing 2 and has aeration blades 7a on the outer periphery of the lower end and a cylindrical body on the outer periphery of the upper part. Inverted cone 4 for converting sewage into horizontal direction
Aeration shaft 3 attached with at least this stirring blade 7
It is composed of a cylindrical tubular body 5 (draft tube) arranged so as to cover the outer periphery of a at a predetermined interval. Further, the cylindrical body 5 is shorter than the stirring shaft length, and the aeration blade 7
It has a length slightly projecting downward from the lower end of a, and is vertically installed on the mounting base 1, and at the upper part of the tubular body 5, sewage that has risen in the tubular body due to the rotation of the aeration blade 7a is placed in the tubular body. 5
Outlet 12 that can be discharged radially to the outer periphery of the
To form. A disk-shaped upper guide plate 10 which allows the aeration shaft 3 to penetrate therethrough is attached to the attachment base 1 horizontally in the center of the air outlet 12, and the upper guide plate 10 is opposed to the upper guide plate 10 at a required vertical interval. The lower guide plate 5a and the lower guide plate 5a arranged in such a manner that the wastewater is discharged in the horizontal direction. The lower guide plate 5a is formed by bending the upper end of the tubular body 5 in the morning glory shape in the outer peripheral direction. Can be formed. In order to keep the distance between the upper guide plate 10 and the lower guide plate 5a constant, the connecting rod 11 is fixedly provided between the tips of the upper guide plate 10 and the lower guide plate 5a.
Alternatively, they can be arranged in an adjustable manner.

Further, as shown in the figure, the upper end of the cylindrical aeration shaft 3 is bent outward to form a support piece 3a, and the lower surface side of the support piece 3a is placed on the rotary bearing 2 and is rotatable. In addition to supporting, the upper surface of the support piece 3a is disposed so as to be opposed to the lower surface of the clutch mechanism 9 so that the clutch mechanism 9 can be locked, so that when the clutch mechanism 9 operates, the clutch mechanism 9 is attached to the upper end of the aeration shaft 3. The support piece 3a is locked so that power can be transmitted. In addition, the lower end of the cylindrical body 5 is
It is formed so as to be straight or to be slightly expanded like a funnel as shown in the drawing, so that the inflow of dirty water from the lower water region of the tubular body 5 into the tubular body can be smoothly performed.
Further, the stirring shaft 6 is rotatably inserted in the cylindrical aeration shaft 3. In this case, in order to prevent the cantilever type stirring shaft 6 from swinging, a bearing or the like is provided in the aeration shaft 3. I have something to do.

The aeration blade 7a has a screw shape like the agitation blade 7b, but the shape is not particularly limited as long as it can generate a water flow, and the aeration blade 7a. The diameter of 7a is set to be larger than the diameter of the stirring blade 7b, and the spiral direction is also different, but it is not particularly limited.

Next, the operation of this embodiment will be described. During anaerobic operation in which only agitation is performed without blowing air into the dirty water, as shown in FIG. 1, when the clutch mechanism 9 is disconnected from the cylindrical aeration shaft 3, the motor 8 is driven when the motor 8 is driven. The stirring shaft 6 connected via the joint 13 is rotationally driven, and the sewage in the tank is stirred by the stirring blade 7b at a predetermined water depth position. At this time, the aeration shaft 3 and the blade 7
Since the clutch mechanism is disengaged, a is not driven to rotate.

In order to perform the aeration (aerobic) operation in which air is blown into the dirty water, the clutch mechanism 9 is operated and the clutch mechanism 9 is engaged with the support piece 3a of the aeration shaft 3 as shown in FIG. Power transmission is possible. When the electric motor 8 is driven in this state, the stirring shaft 6 connected via the shaft coupling 13 is rotationally driven, and the sewage in the tank is stirred by the stirring blade 7b at a predetermined water depth position, and the aeration shaft 7a is also driven, and the sewage that has risen so as to be pushed up inside the cylinder while being stirred by the aeration blade 7a inside the cylinder is converted to a radial direction by the inverted cone 4 above the aeration blade. The outlet 12 formed between the upper and lower guide plates 10 and 5a
As a result, the sewage is scattered in the radial direction of the outer peripheral portion of the cylindrical body 5.
When the sewage is scattered on the surface of the water in the tank due to the scattering of the sewage, oxygen in the air is dissolved and a required aeration and aeration is performed.

The aeration stirrer of the present invention has been described above based on the embodiment, but the present invention is not limited to the structure described in the above embodiment, and the structure is appropriately changed without departing from the spirit of the invention. Can be changed.

[0025]

According to the aeration and agitation apparatus of the present invention, the aeration blade is selectively driven by the electric motor through the clutch mechanism, separately from the agitation blade that is constantly driven by the electric motor. Since the aerobic operation and the anaerobic operation are switched by the operation of the clutch mechanism, it can be driven by one fixed electric motor, which simplifies the configuration and operates the clutch mechanism during aerobic operation. The agitating blade mixes the sewage in the tank with the aeration blade, and at the same time sends the sewage into the cylinder with the aeration blade, and continuously disperses the sewage around the outside of the cylinder like a fountain and drops it into the water. Aerobic operation by aeration can be easily performed by sending in air, while aeration blades can be stopped by simply disconnecting the clutch mechanism during anaerobic operation.
Only the stirring blade is rotated, and only stirring can be performed without blowing air into the dirty water.

By attaching the stirring blade to the lower end of the stirring shaft which is rotationally driven by the electric motor arranged on the mounting base, the stirring blade is always rotationally driven by driving the electric motor to determine whether or not there is aeration. Nevertheless, it is possible to surely stir the dirty water.

Further, the aeration blades are rotatably mounted vertically on the mount and are attached to the outer periphery of a cylindrical aeration shaft which allows the agitation shaft to be inserted therethrough. Since the shaft can be easily supported coaxially, there are few failures, and maintenance of the aeration blades can be performed easily.

Further, the clutch mechanism is attached to the stirring shaft side, selectively locked with the aeration shaft, and configured so as to transmit the rotational force to the aeration shaft, thereby switching between rotation drive and stop of the aeration shaft. It can be done only by operating the clutch, which simplifies the equipment and operation, reduces breakdowns, and facilitates maintenance.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an embodiment of an aeration and agitation device of the present invention, in a state where anaerobic operation is performed.

FIG. 2 is a cross-sectional view showing a state where aerobic operation is performed.

[Explanation of symbols]

B aeration stirrer 1 mounting base 2 rotary bearing 3 Aeration axis 4 inverted cone 5 cylinder 5a Lower guide plate 6 stirring shaft 7a Aeration blade 7b Stirring blade 8 electric motor 9 Clutch mechanism 10 Upper guide plate 11 connecting rod 12 Outlet 13 Upper stirring blade

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Keisuke Hirose             Hitachi, 3-4-1, Shimosaka, Amagasaki-shi, Hyogo             Kiden Kogyo Co., Ltd. (72) Inventor Eiji Shimada             Hitachi, 3-4-1, Shimosaka, Amagasaki-shi, Hyogo             Kiden Kogyo Co., Ltd. (72) Inventor Hajime Iinuma             Hitachi, 3-4-1, Shimosaka, Amagasaki-shi, Hyogo             Kiden Kogyo Co., Ltd. F-term (reference) 4D029 AA06 BB10                 4G035 AB25 AE11 AE19                 4G078 AA13 AB20 BA05 BA07 BA09                       CA10 CA19 DA09 DC10

Claims (4)

[Claims] 1. An aeration agitator having an aerator main body having an agitation blade attached to an agitation shaft that is driven to rotate by an electric motor, and a cylindrical body arranged so as to cover the outer periphery of the agitation shaft, on an attachment base. An aeration stirring device comprising: a stirring blade that is constantly driven by an electric motor; and an aeration blade that is selectively driven by the electric motor via a clutch mechanism. 2. The aeration stirrer according to claim 1, wherein the stirring blade is attached to a lower end of a stirring shaft which is rotationally driven by an electric motor arranged on the mount. 3. The aeration agitator according to claim 1, wherein the aeration blade is rotatably hung vertically on a mounting base and is attached to the outer periphery of a cylindrical aeration shaft capable of inserting the agitation shaft. apparatus. 4. A clutch mechanism is attached to the stirring shaft side,
The aeration stirring device according to claim 1, 2 or 3, wherein the aeration stirring device is configured to selectively engage with the aeration shaft and transmit the rotational force to the aeration shaft.