KR0173454B1 - Floating aerator - Google Patents

Abstract

None.

Description

Floating Aerator

1 is an explanatory diagram of a floating actuator showing a conventional example.

2 (a) and 2 (b) are explanatory diagrams showing another use state of an aerator of the type which is the basis of the present invention.

3 is a cross-sectional side view of a portion of a floating aerator showing a first embodiment of the present invention.

4 is a main cross-sectional view of FIG.

4 is a main cross-sectional view of FIG.

5 is an explanatory diagram showing an operating state of the first embodiment;

6 is a longitudinal cross-sectional view of a floating actuator showing a second embodiment of the present invention.

6A is an enlarged cross-sectional view of a main portion of A of FIG. 6.

7 (a) and 7 (b) are explanatory diagrams showing aspects of the discharge scattering flows of the present invention and the conventional example, and the flow pattern seen from above.

Fig. 8 is a longitudinal sectional view of a floating aerator floating in a shallow tank showing a third embodiment of the present invention.

Fig. 9 is a longitudinal sectional view of a floating aerator floating on a deep tank showing a fourth embodiment of the present invention.

FIG. 10 is a partially enlarged view of the FIGS. 8 and 9 embodiment. Figure (a) is a longitudinal sectional view of the main part of the suction pipe, Figure (b) is a longitudinal sectional view of the main part of the suction bell for the shallow tank of the embodiment of Figure 8, Figure (c) is an enlarged sectional view of the C part of Figure (a).

FIG. 11 is a longitudinal sectional view of a floating aerator showing a fifth embodiment of the present invention; FIG.

12 is a partially enlarged view of the embodiment, in which (a) is a longitudinal sectional view of the suction pipe, and (b) and (c) are plan views of main parts of part A of FIG.

FIG. 13 is an explanatory diagram showing an example of the mooring of the floating actuator according to the fifth embodiment of the present invention. FIG.

* Explanation of symbols for main parts of the drawings

1: float 3: motor

5, 21: Impeller 7: Installation tank (aeration tank)

9: bottom 11: casing

13: air suction unit 15: air supply pipe

17: suction pipe 19: submersible motor

23: discharge passage 25: deflector

27: suction bell

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an aerator (aeration device) for purifying sewage in a sewage treatment plant such as a factory wastewater treatment plant or an urban sewage treatment plant, and more particularly, a floating air floating on a liquid surface by a float. It's about a radar.

Conventionally, in order to treat sewage, liquid surface agitation, an acid pipe type, an acid substrate type, etc. are known. Recently, a mechanical driving device such as an aerator with an impeller is used to forcibly generate gaseous circulation in the aeration tank. The technique which raises an aeration rate is employ | adopted, and the floating aerator which floats on the liquid surface especially by attaching a float to the aerator is used.

As an example of the above floating aerator, as shown in FIG. 1, the impeller 5 is directly connected to the lower side of the motor 3 supported by the float 1 so as to be immersed below the liquid piece. The casing 11, which surrounds the impeller 5 and reaches the vicinity of the bottom surface 9 of the installation tank (aeration tank) 7, is also supported by the float 1. The casing 11 is provided with an air suction part 13 having a plurality of small holes at a lower position of the impeller, and the air suction part 13 communicates with the outside air via the air supply pipe 15. have.

In operation, the impeller 5, which is rotated by the motor 3, sends the liquid (processing liquid) from the top to the bottom, as indicated by the arrow A in the casing 11, during which the air is arrowed. As shown by (B), the gas-liquid mixed liquid is sucked from the supply pipe 15 and discharged as shown by arrow C along the bottom part 9 of the installation tank, and aeration is performed. Such a floating actuator is disclosed in, for example, Japanese Patent Laid-Open No. 58-6290.

In the above-described conventional example, although effective in itself, a large discharge flow rate is required to circulate the gas-liquid mixed flow up to the corner of the installation tank to increase the aeration performance. The flow must be decelerated. However, there is a problem that the discharge flow is easily decelerated in the installation tank.

In order to cope with the above problems, floating aerators have been proposed as shown in Fig. 2 (a). This is provided with an underwater motor 19 in the suction pipe 17 connected to the lower part of the float 1, and the impeller 21 is directly connected so that it may be located below the water surface WL in the upper part of the underwater motor 19. In addition, the float 1 is provided with the deflector 25 which forms the discharge flow path 23 between the float 1 upper surface and the float 1 upper part. 27 is a suction bell.

In operation, by the rotation of the impeller 21 by the submersible motor 19, the liquid is sucked from the suction bell 27 of the suction pipe 17, as indicated by the arrow D, and the upper portion of the float 1 As shown by the arrow E in the air after passing through the discharge flow path 23 formed in the air, the liquid is scattered radially, and in contact with oxygen in the air and the liquid in the air, the discharge liquid drops and the liquid in the installation tank is dropped. The surface aeration and agitation effects of absorbing oxygen into the liquid are obtained by drawing the atmosphere when it collides with the surface.

By the way, in the above, when the installation tank is shallow and the suction bell 27 of the suction pipe 17 is near the bottom 9 of the installation tank as shown in FIG. The liquid can be sucked in from and scattered radially on the surface of the installation tank. However, as shown in FIG. 2 (b), when the installation tank is deep and the suction bell 27 and the installation tank bottom 9 are separated, Liquid cannot be sucked from the liquid core in the installation tank.

In such a case, when a conventional material is used for the aerator, there is a problem that the float portion must be enlarged to increase the buoyancy by an amount corresponding to the weight increased by the extension of the suction pipe 17. If the shape cannot be changed, the suction pipe cannot be extended in correspondence with the liquid depth of the installation tank, so that it is impossible to suck up the liquid from the liquid core of the installation tank, thereby aeration and There was a problem that agitation could not be sufficiently performed.

The present invention solves the above-described problems, and does not increase the size of the float portion, and the floating air can suck the liquid from the liquid core in the tank regardless of the depth of the installation tank and radially scatter on the surface of the installation tank liquid. Its purpose is to provide a radar.

In order to achieve the above object, the present invention connects a suction pipe to a lower portion of a float, and installs an impeller for sucking and discharging liquid through the suction pipe in an upper portion of the suction pipe and driving a motor for driving the impeller in the suction pipe. Or in a floating aerator provided at an upper portion of the float and provided with a deflector so that a discharge flow path is formed above the float with the upper surface of the float. It is characterized by being composed of 1.1 specific gravity material.

As described above, the material having a specific gravity in the range of 1.0 to 1.1, which is close to the specific gravity of water, is composed of, for example, a special olefin-based material by reactive injection molding.

As described above, the suction pipe made of a light material close to the specific gravity of water is configured to extend by connecting and assembling a plurality of suction pipes of a predetermined length according to the depth of the liquid in the installation tank.

As described above, since the floating aerator suction tube is made of a material having a specific gravity of 1.0 to 1.1, which is close to the specific gravity of water, the present invention extends the suction tube even if the suction tube is extended in accordance with the liquid depth of the installation tank. Since the weight increase by one is very small, the same flow can fully cope with laying on the liquid surface in the installation tank. Therefore, it is possible to extend the suction pipe to the vicinity of the bottom of the mounting tank, so that the liquid in the core portion can be sucked up and scattered radially onto the surface of the mounting tank liquid, so that aeration and agitation of the entire installation tank are sufficient. Can be done.

In this way, even when the depth of the liquid in the installation tank is deep, even if the suction pipe is connected, the whole weight only increases slightly with respect to the water, so that the float does not need to be large, thereby removing the liquid near the bottom of the installation tank. By sucking up and scattering on the surface of the liquid in the tank, the entire liquid in the installation tank can be aerated and stirred.

The above and other objects, features and advantages of the present invention will become more apparent with reference to the following description in conjunction with the accompanying drawings showing suitable embodiments of the present invention for purposes of illustration.

Next, a preferred embodiment of the present invention will be described with reference to the drawings.

FIG. 3 is a partial cross-sectional side view of a floating aerator showing an embodiment of the present invention, and FIG. 4 is a main cross-sectional view thereof, wherein the same reference numerals as those shown in FIG. 2 (a) (b) are the same. To equivalent parts.

In the figure, the lower part of the float 1, for example, is made of a material having a specific gravity close to the specific gravity of water produced by a special olefin-based material, for example, in the range of 1.0 to 1.1. The suction pipe 31 and the suction bell 33 provided in the lowermost suction pipe 31 are connected. The impeller is provided at the output shaft end of the submersible motor 19 and is fixed to the motor support ring 35 and is provided between the float 1 and the suction pipe 31. Moreover, the deflector 25 is fixed to the float 1 upper part in order to form the discharge flow path 23.

Next, Table 1 shows some examples of the names and specific gravity of the present invention and the materials conventionally used.

As shown in Table 1, the specific olefin specific gravity used in the present invention shows a specific gravity very close to water as compared to other conventional materials.

37 is an underwater motor power cable.

Next, the operation will be described. As shown in the operation diagram of FIG. 5 in which two suction pipes 31 are connected, the impeller 21 provided at the output shaft end of the underwater motor 19 rotates during operation. The liquid (processing liquid) in the installation tank is sucked from the lower side of the suction bell 33 as an arrow, passes through the suction pipe 31, and is formed by the float 1 and the deflector 25. It is scattered radially in the atmosphere via (23), and the stirring effect is obtained with the aeration effect by drawing in air.

According to this embodiment, as mentioned above, since the suction pipe 31 is comprised by the material of 1.0-1.1 which is especially close to the specific gravity of the water produced by the special olefin type, for example, the float 1 is the same. Even if the shape is used, the length of the suction pipe 31 connected to the lower portion of the float can be freely set according to the depth of the installation tank, and the position of the submerged water in the float 1 is hardly changed. The hydraulic performance of (21) does not change, and the original performance of the floating aerator can be sufficiently exhibited, so that a stable aeration and stirring performance can be obtained.

Therefore, since the liquid in the installation tank can be sucked up and scattered radially on the surface of the liquid in the installation tank, the aeration and stirring effects are greatly improved. Moreover, since the main body and the parts weight are very light compared with the conventional one, handling is easy.

In the above-described embodiment, a structure in which a plurality of suction pipes 31 are connected and assembled has been described. However, it is a matter of course that the suction pipe 31 can be used even when a single suction pipe and a suction pipe and a bell are integrated.

In addition, in the above embodiment, the members other than the suction pipe 31 are also made of a material close to the specific gravity of water, but at least the suction pipe 31 is made of a material close to the specific gravity of the water.

Moreover, although the structure which comprised the motor which drives the impeller 21 by the submersible motor 19 provided in the suction pipe 31 was demonstrated, it can also be comprised by the dry motor provided in the upper part of a float. .

FIG. 6 is a longitudinal cross-sectional view of the floating actuator showing the second embodiment of the present invention, wherein the same reference numerals as those shown in FIGS. 3 to 5 in FIG.

In this embodiment, the diameter D of the circular deflector 25 is formed at least 70% of the diameter D of the float 1, and the diameter of the discharge-side flow path of the deflector 25 is reduced. In the cross-sectional shape on the outlet side, the angle θ is inclined upward with respect to the horizontal plane, and in this embodiment, the inclination angle θ is formed at 30 degrees.

Moreover, the leg 39 which fixes the deflector 25 and the float 1 is located in the inside of which diameter D of the center part is 50% or less of the diameter D of the circular deflector 25, and is located. Moreover, the cross-sectional shape of the leg 39 is formed in the sharp circular shape at both ends of the longitudinal direction, as shown to the sectional drawing 6a which showed the 6th part A enlarged view.

As described above, the deflector 25 has a diameter D of 70% or more of the diameter D of the circular float 1, and the cross-sectional shape of the discharge flow path outlet portion is angled with respect to the horizontal plane. Since (30 °) is inclined, as shown in Fig. 7A, the discharge scattering flows can be scattered without dispersing the shape to a far distance, so that a good appearance can be maintained. Moreover, since the discharge flow path width W is gradually widened toward the outlet side, it is easy to flow, and the discharge flow volume increases, so that the aeration efficiency can be increased.

Moreover, the cross-sectional shape of the both ends of the longitudinal direction of the leg 39 of the deflector 25 provided in the upper surface of the float 1 is made into sharp circular shape, and the leg 39 has a circular center diameter D of circular shape. By providing the inner side of 50% or less of the diameter D of the deflector 25, the resistance of the flow to the scattering of discharged water can be suppressed small, and the division of the discharge scattering flows in the circumferential direction is carried out. As shown in Fig. (A), it can be made small or not to be generated, and since the deflector outer diameter is large, it is re-aggregated after division, and with the rectifying effect of the discharge flows, the scattered water is constantly scattered radially. Aesthetics can be achieved.

In the case where the leg 39 'is a circular cross section and the central diameter D of the leg is 50% or more of the deflector diameter D, as shown in FIG. It is divided in the circumferential direction.

Further, in the above-described embodiment, the structure in which the discharge flow path of the deflector 25 is inclined 30 degrees upward with respect to the horizontal plane has been described, but the angle θ is, of course, not limited to this angle.

FIG. 8 is a longitudinal cross-sectional view of the floating aerator showing the third embodiment of the present invention, wherein like numerals as those shown in FIGS. 3 to 7 in FIG.

In this embodiment, the suction bell (bell mouse) 33 connected to the lower end of the suction pipe 31 is provided with a liquid suction window 41 on the side, and the bottom surface thereof is closed by a plate 43.

Since it is comprised as mentioned above, when the said floating aerator is installed and used in a shallow tank, the liquid in the tank comes from the liquid suction window 41 provided in the side surface of the suction bell 33, Since suction is carried out as shown by the arrow F, even if there is almost no gap between the lower surface of the suction bell 33 and the tank bottom 9, the liquid in the tank is sucked without directly inhaling the mud deposited in the tank. By scattering to the surface of the surface layer, it is possible to efficiently aeration without lowering the transparency of the entire tank.

FIG. 9 is a longitudinal sectional view of a floating aerator showing an embodiment similar to that of FIG. 3 used for a deep tank, in which the same numerals as those shown in FIGS. It shall be shown.

In this embodiment, similar to the embodiment of FIG. 3, the suction pipe 31 can be connected and extended in plural numbers depending on the depth of the liquid in the installation tank, and the suction bell 33 provided at the lowermost end faces downward. As shown by the arrow, the liquid is sucked in.

And the connection part of the both ends of each said suction pipe 31 and the upper end of the suction bell 33 is a fitting structure which consists of a male and a female, as shown to FIG. 10 (a) and (b), Inside the male end portion A of one end, as shown in the enlarged view c of FIG. 10A, the nut 45 is surrounded by a plurality of casts at equal intervals in the circumferential direction. The female end portion B at the other end is provided with a bolt hole 47 at a position corresponding to (matching) the nut 45. 49 in the figure is a bore hole.

The fitting structure between the suction pipe 31 and the suction bell 33 is similarly applied to the connection portion between the suction pipe 31 and the suction bell 33 of the third embodiment (Fig. 8).

According to this embodiment, when the floating aerator is installed and used in a deep tank, the connection structure between the suction pipes 31 or the suction pipes 31 and the suction bells 33 is shown in FIG. Because of the fitting structure as shown in (a) and (b), the extension of these suction pipes 31 can be easily performed depending on the situation, and accordingly, the liquid depth of the installation tank (pegs). It is easy to configure the aerator body with the optimum suction pipe length, and after the installation, it is possible to adjust and disassemble the length of the suction pipe 31 easily in accordance with the liquid level change in the tank. The most suitable aeration effect in the tank is obtained.

FIG. 11 is a longitudinal cross-sectional view of a floating actuator showing still another embodiment of the present invention, in which the same reference numerals as those shown in FIGS. 3 to 10 denote the same to the same parts.

In this embodiment, the suction pipe 31 having a shape as shown in FIG. 12 (a) is configured to be assembled between the motor support ring 35 and the suction bell 33, and the suction pipe 31 is A part of the upper flange surface 51 penetrates the inside and the outside of the suction pipe 31 as shown in the drawing (b) which is the top view of the recessed part A in the figure, and the drawing (c) which is the side view of the recessed part. A lead sheet 53 corresponding to the accommodating portion of the groove-shaped power cable is formed, and the lead portion 55 of the power cable pull-out sheet 53 is formed in a funnel shape.

The power cable drawing sheet 53 is drawn out from the outside of the flow path, i.e., outside the suction pipe 31 so that the power cable 37 drawn out from the lower side of the submersible motor 19 is placed thereon, and then the power cable. 37 is inserted and fixed together with the lower surface of the flange of the motor support ring 35.

The power cable 37 is protected on the sheathed cable with another protective material, for example, a thick vinyl tube, for protection in the flow path, i.e., inside the suction pipe 31 and the insertion portion. This circumference is protected by a thick vinyl tube, for example. In addition, the circumference is filled with, for example, an epoxy rubber, to prevent wear due to contact with the outlet.

On the other hand, the fastening sheet 63 of the plate-shaped mooring rope 61 with a hole in the center is formed integrally with the flow unit main body in the water locking portion of the lower surface of the float 1.

In the case of floating and using the floating actuator in the tank, as shown in FIG. 13, the mooring pile 65 is driven into the main surface of the mounting tank and once attached to the mooring rope fastening sheet 63. The other end of the mooring rope 61, which is connected to the mooring rope 61, is connected to the holding pile 65 for mooring. At this time, the power cables 37 are respectively fixed to the mooring rope fastening sheet 63 via fasteners (supports) 67, and pass through the conduits 69 embedded in the ground around the tank. After exiting the ground, they are to be led to the operation panel.

According to this embodiment, a groove-shaped power cable take-out sheet 53 is provided on a part of the flange face 51 of the suction pipe 31, and the pull-out sheet 53 is mounted on the motor support ring (from above). Since the power cable 37 is fixed by inserting it into the flange surface of 35), as in the prior art, assembling work can be performed much more easily than the long power cable is led outside the suction pipe through the protective pipe. At the same time, there is an advantage that the risk of damaging the sheathing part does not arise when passing the power cable through the protective pipe.

In addition, since the rope fastening sheet 63 is formed by integrally forming with the float main body in the submerged part of the bottom surface of the float 1, the mooring rope 61 is not seen from the outside during the floating installation. There is an advantage that it can be used as a fixing sheet for the power cable 37 of the submersible motor 19 without damaging the beauty of the surroundings, and the conventional screw hole workability for mounting an eye bolt as in the prior art. This becomes unnecessary and can reduce the assembly labor.

As described above, according to the present invention, a motor-driven impeller for connecting a suction pipe to the lower part of the float, and sucking and discharging liquid through the suction pipe is provided on the upper part of the suction pipe, and above the float. In the flow actuator provided with the deflector which forms the discharge flow path between the upper surface, the inlet pipe is made of a material close to the specific gravity of the water, so that the float may be formed in the lower portion of the float according to the depth of the installation tank even if the same shape is used. Since the length of the suction pipe to be connected can be set freely, and the locked position at the time of laying the float hardly changes, the hydraulic performance of the impeller does not change, and the inherent performance of the floating aerator can be sufficiently exhibited. Stirring performance can be obtained.

Therefore, since the liquid in the installation tank can be sucked up and scattered radially on the surface of the liquid in the installation tank, the aeration effect and the stirring effect are greatly improved.

Claims (18)

A suction pipe is connected to the lower part of the float, and a motor-driven impeller for sucking and discharging the liquid through the suction pipe is installed on the upper part of the suction pipe, and a discharge flow path is formed above the float with the upper surface of the float. A floating aerator provided with a deflector, wherein the suction pipe is made of a material having a specific gravity close to that of water. The floating air generator according to claim 1, wherein a motor for driving the impeller is provided in the suction pipe or the upper portion of the float. The floating aerator according to claim 1, wherein the suction pipe is made of a special olefin material by a reactive injection molding method. A suction pipe is connected to the lower part of the float, and a motor-driven impeller for sucking and discharging liquid through the suction pipe is provided above the suction pipe, and a discharge flow path is formed above the float to form a discharge flow path between the upper surface of the driving float and the upper part of the float. In a floating aerator equipped with a machine, the suction pipe may be made of a material having a specific gravity close to that of water, and the suction pipe connected to the bottom of the float may be extended by connecting a plurality of suction pipes of a predetermined length depending on the depth of the liquid in the installation tank. Floating air, characterized in that. The floating air generator of claim 1, wherein the specific gravity is a value in the range of 1.0 to 1.1. A suction pipe is connected to the lower part of the float, and a motor-driven impeller for suctioning and discharging liquid through the suction pipe is installed on the upper part of the suction pipe, and a discharge flow path is formed above the float with the upper surface of the float. A floating aerator provided with a deflector, wherein a member other than a motor part such as a float, an impeller and a suction pipe is made of a material having a specific gravity close to that of water. The floating air generator according to claim 6, wherein a motor for driving the impeller is provided in the suction pipe or the upper portion of the float. The floating aerator according to claim 6, wherein members other than motor parts such as floats, impellers, and suction pipes are made of a special olefin-based material by the reactive injection molding method. A suction pipe is connected to the lower part of the float, and a motor-driven impeller for sucking and discharging the liquid through the suction pipe is installed on the upper part of the suction pipe, and a discharge flow path is formed above the float with the upper surface of the float. In a floating aerator provided with a deflector, a member other than a motor part such as a float, an impeller, and a suction pipe is made of a material having a specific gravity close to that of water, and the suction pipe connected to the bottom of the float is a liquid in an installation tank. And a plurality of suction pipes of a predetermined length to extend in accordance with the depth. The floating aerator according to claim 6, wherein the specific gravity is a value in the range of 1.0 to 1.1. The plane shape of a deflector is made into 70% or more of the diameter of a circular float, and the cross-sectional shape of the discharge flow path side of the deflector is made into the shape which has an inclination angle upward. Floating aerator The cross-sectional shape of the both ends of the longitudinal direction of the leg of the deflector provided in the float upper surface was made into sharp circular shape, and the said leg was provided in 50% or less of the diameter of a circular deflector. Floating Aerator. The floating aerator according to claim 1, wherein a suction bell is connected to a lower portion of the suction pipe, and the suction bell is a suction bell having a window for liquid suction on a side surface. The suction pipe is connected to a lower portion of the suction pipe, and the suction pipes or the connection portions of the suction pipe and the suction bell are fitted to each other so that the suction pipe can be extended, and at one end of the connection portion. A floating aerator, wherein the nut is enclosed with a casting or the like and integrally provided, and a bolt hole is formed at the other end of the connecting portion so as to be spaced apart and fixed in the circumferential direction. The pull-out sheet corresponding to the groove-shaped power cable accommodating part which penetrates an inner shaft and an outer side is provided in a part of the flange surface of the said suction pipe, and the said groove-shaped extracting sheet is provided in a motor support ring. Floating air, characterized in that to insert the flange surface of the power cable to be fixed. The floating aerator as claimed in claim 1, wherein the spooling sheet of the mooring rope for mooring and fixing the aerator main body to the periphery of the installation tank is integrally provided with the float in the submerged water of the bottom surface of the main body. . The floating air generator of Claim 4 whose said specific gravity is the value of the range of 1.0-1.1. 10. The floating actuator of claim 9, wherein the specific gravity is a value in the range of 1.0 to 1.1.

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