KR20120092905A - Areation aapparatus - Google Patents

Abstract

PURPOSE: An aerating apparatus is provided to increase the mixing rate of air and water by radially emitting air into water in a mixing part equipped with an impeller and applying the torque of the impeller into the water mixed with the air. CONSTITUTION: An aerating apparatus includes a casing(100), a mixing part(200), an impeller, a sucking housing(500), and an air introducing part(600). The casing is arranged in water, and a motor is embedded in the casing. An outlet is formed at the mixing part, and the driving shaft of the motor penetrates from the rear side to the front side of the mixing part. The impeller is rotatably installed in the mixing part. The impeller is combined with the driving shaft. The sucking housing is installed at the front side of the mixing part, and the rear side of the sucking housing is opened. A plurality of sucking holes(510) is formed at the sucking housing. The air introducing part penetrates from the front side to the rear side of the sucking housing. External air is introduced toward the impeller by the air introducing part.

Description

Aeration Device {Areation Aapparatus}

The present invention relates to an aeration apparatus, and more particularly, to an aeration apparatus that is effectively supplied with air in water, and that the air stays in water for an extended time, and has an excellent aeration effect.

In general, wastewater is aerated in the treatment of organic wastewater using microorganisms.

Aeration of the wastewater increases the amount of dissolved oxygen in the wastewater, which activates aerobic microorganisms, promotes the removal of suspended substances and harmful gases, and increases the wastewater treatment efficiency.

Fish farms also aeration the water in the tank, which also increases the amount of dissolved oxygen to prevent water contamination and promotes the growth of live fish. Green algae and redness were also observed to be prevented.

1 is a conventional aeration apparatus, as shown in FIG. 1, a housing 10 having an air inlet 12 formed at an upper side thereof and an opening 14 formed at a lower side thereof, and a pump embedded in the housing 10. 20 and a stirring impeller 40 mounted on the lower end of the rotating shaft 22 of the pump 20 so as to be located at the opening 14 side of the housing 10, and in the housing 10 an air passage ( a) is formed.

The housing 10 is formed of a cylindrical body having an opening 14 formed at a lower side thereof, and an air inlet 12 is formed at an upper side thereof. The air inlet 12 is connected to the pipe 9 extending to the outside. Preferably, a silencer 7 is mounted on the top of this pipe 9.

In the housing 10, a pump 20 is mounted. The pump 20 is mounted to the housing 10 by flanges formed at upper and lower circumferences so that the driving shaft 22 is positioned up and down. In addition, a stirring impeller 40 is mounted at a lower end of the rotation shaft 22 of the pump 20, that is, at an end near the opening 14.

On the other hand, since the pump 20 is mounted to the housing 10 by flanges formed at the upper and lower ends, the space 27 spaced apart by the width of the flange between the inner circumferential surface of the housing 10 and the outer circumferential surface of the pump 20. ) Is formed. In addition, the flange is formed in communication with the space 27, the intake hole 25 through which the air is sucked and the exhaust hole 26 through which the air is discharged. Accordingly, air is introduced into the housing 10 by the space 27 formed between the housing 10 and the pump 20, and the intake holes 25 and the exhaust holes 26 are discharged to the outside. (a) is formed.

The conventional aeration device is installed in a water tank or a wastewater treatment plant of a fish farm so that the entire housing 10 is submerged in water or at least the stirring impeller 40 is submerged in water.

When the pump 20 is operated, the stirring impeller 40 is operated, and a strong vortex is formed in the water by the stirring impeller 40. At the same time, centrifugal force is generated around the stirring impeller 40 and air is sucked into the water by the centrifugal force. At this time, external air is introduced into the water through the air passage a. In this way, the air flowing into the water is uniformly diffused in the water tank by the vortex generated in the water by the stirring impeller 40.

However, the air introduced into the water through the air passage (a) is discharged in the form of large bubbles to rise above the water surface in a short time.

Therefore, the air supplied into the water does not dissolve in water, but quickly rises to the surface of the water, so that the time for the air to stay in the water is short, there is a problem that the mixing ratio of air and water falls.

The present invention has been made to solve the above problems, the air is radially discharged from the casing provided with the impeller to be mixed with the water, and the rotational force of the impeller is applied to the water mixed with the air again the water and air The mixing rate of the air and the water is increased by allowing the mixture to be discharged into the water, thereby providing an aeration device in which the time for which the air stays in the water can be extended, thereby increasing the amount of dissolved oxygen.

Aeration device of the present invention for achieving the above object, the hollow casing is provided in the water and the motor is built; A mixing part installed at the front side of the casing, opening in the front, and having a discharge hole formed therein, the driving shaft of the motor extending through the front from the rear; An impeller rotatably installed in the mixing part and fastened to the driving shaft to generate a flow in a radial direction of the mixing part; A suction housing installed at the front side of the mixing part and having a hollow cylindrical shape opened to the rear and having a plurality of suction holes; And an air inlet part installed through the rear of the suction housing and passing through the rear of the suction housing and serving as a passage through which external air flows toward the impeller.

The impeller is formed in a disk-shaped rotating plate portion, protruding from the rotating plate portion to the front of the center of rotation, the support tab portion is inserted into the end of the drive shaft, and extends while having a curve toward the support tab portion from the outside of the rotating plate portion It may be composed of a plurality of rotary blades protruding forward of the rotating plate portion.

The air inlet may be a tube provided penetrating from the front to the rear of the suction housing, the front end of the tube may be exposed to air and the rear end may extend into the mixing unit.

The tubular body is provided through the front of the suction housing through the rear and the hollow inlet tab portion having one side and the other side open, the hollow inlet tube portion connected to the front side of the inlet tab portion and the other side is open, and the inflow It is connected to the rear side of the tab portion and may be formed of a hollow extension pipe portion that is open on one side and the other side extending to form a gap between the support tab portion.

Between the mixing portion and the suction housing is provided a disk-shaped separating plate formed with inlet holes penetrating back and forth, the rear end of the extension pipe portion may extend through the inlet hole.

The mixing part is provided with a discharge part communicating with the discharge hole, the discharge part is a hollow discharge tab portion of one side and the other side open to communicate with the discharge hole, and a hollow discharge pipe portion connected to the discharge tab portion and one side and the other side is open Can be done.

The discharge pipe part may include a large diameter part forming a first half and a small diameter part forming a second half, and a radial length of the small diameter part may be smaller than a radial length of the large diameter part.

The discharge pipe portion may be provided by compressing the second half of the pipe extending in the front and rear direction.

According to the aeration device of the present invention as described above, the air is radially discharged from the mixing section provided with the impeller to mix with the water, and the rotational force of the impeller is applied to the water mixed with the air again the water and air The mixing rate of the air and water is increased by allowing the mixture to be discharged into the water, and thus the time for which the air stays in the water can be extended, thereby increasing the amount of dissolved oxygen.

1 is a cross-sectional view showing a conventional aeration device,
2 is a side view showing an aeration device according to an embodiment of the present invention,
3 is a cross-sectional view showing an aeration device according to an embodiment of the present invention,
Figure 4 is an exploded perspective view showing an aeration device according to an embodiment of the present invention,
5 is a front view illustrating the coupling state of the rotating plate constituting the aeration device according to an embodiment of the present invention,
6 is a perspective view illustrating a suction housing constituting the aeration device according to an embodiment of the present invention,
7 is a cross-sectional view for explaining the operating state of the aeration apparatus according to an embodiment of the present invention,
8 is a perspective view showing another form of the discharge pipe portion constituting the aeration device according to an embodiment of the present invention.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention.

Figure 2 is a side view showing an aeration device according to an embodiment of the present invention, Figure 3 is a cross-sectional view showing an aeration device according to an embodiment of the present invention, Figure 4 is aeration according to an embodiment of the present invention 5 is an exploded perspective view illustrating the apparatus, and FIG. 5 is a front view illustrating the coupling state of the rotating plate constituting the aeration apparatus according to an embodiment of the present invention, and FIG. 6 is an aeration apparatus according to an embodiment of the present invention. It is a perspective view shown for explaining the suction housing which comprises.

Hereinafter, in FIG. 3, the left direction is 'forward', the right direction is 'rear', the front to rear direction is 'downstream', the vertical direction is 'radial', the horizontal direction is 'length direction', and the radial direction. The direction away from the drive shaft 135 is referred to as the 'outer radius direction'.

The aeration device according to an embodiment of the present invention is installed in water such as sewage or waste water, and is provided to discharge water mixed with air by mixing with water in the water by receiving external air, FIGS. 2 to FIG. As shown in Fig. 4, the cylindrical hollow casing 100 installed in the water, the mixing part 200 provided on the front side of the casing 100, and the impeller installed inside the mixing part 200. 300, the separator plate 400 provided at the front side of the mixing unit 200, the suction housing 500 provided at the front side of the separator plate 400, and the suction housing 500. It is provided through the air inlet 600 is installed through the inlet passage of the air, and the discharge portion 700 provided on the outer peripheral surface of the mixing unit 200.

As shown in FIGS. 3 and 4, the casing 100 includes a motor 130 enclosed in a sealed manner, and the driving shaft 135 of the motor 130 faces forward.

The cover part 120 which can be opened and closed is provided at the rear of the casing 100, and the wire part 140 is provided on the cover part 120 to supply driving power to the handle part 150 and the motor 130. do.

As shown in FIGS. 3 and 4, the mixing part 200 has a hollow cylindrical shape that is forwardly opened and a discharge hole 230 penetrated radially in a circumferential surface thereof.

The mixing unit 200 may be integrally provided with the casing 100 in front of the casing 100, and the drive shaft 135 of the motor 130 may move forward from the rear of the mixing unit 200. It is provided with an extension.

As shown in FIG. 3, the driving shaft 135 is rotatably supported by a bearing unit 170 provided in the casing 100, and the driving shaft 135 is forwardly moved to the front of the bearing unit 170. The sealing part 190 is provided between the inner diameters of the mixing part 200.

When the aeration device according to an embodiment of the present invention is provided in the water, water is prevented from entering the casing 100 by the sealing part 190.

3 to 5, the impeller 300 is provided on the drive shaft 135 to generate a thrust in the radial direction of the mixing section 200, the disk-shaped rotating plate 310 and The support tab part 330 having an insertion hole 335 into which the driving shaft 135 of the rotating plate part 310 is inserted is formed, and the plurality of rotating blade parts 320 protruding forward of the rotating plate part 310. Is made of. The support tab portion 330 is provided to protrude forward, and a gap is formed in the radial direction between the inner end of the rotary blade portion 320 and the support tab portion 330.

The air introduced through the air inlet 600 and the water introduced through the inlet hole 410 of the separating plate 400 are formed between the inner end of the rotary blade 320 and the support tab 330. The mixing is further activated while contacting in space and flowing radially by the rotation of the rotary blade 320.

The end of the driving shaft 135 is inserted into the insertion hole 335 is provided integrally.

The cap may be fixed to the driving shaft 135 by screwing the cap to the end of the driving shaft 135 exposed through the insertion hole 335, and a female screw may be formed in the insertion hole 335 to the end of the driving shaft 135. It is also possible to screw directly by forming a male thread.

The impeller 300 is rotated by the driving of the motor 130.

The rotary blade 320 is formed radially, it may be formed in a spiral so as to have a convex curve in the radially outward while extending toward the support tab portion 330 from the outside of the rotating plate 310.

Therefore, when the impeller 300 is rotated by the driving of the motor 130, since the rotary blade 320 protrudes forward, the impeller (in the radial direction substantially perpendicular to the drive shaft 135) Thrust is generated by 300).

As shown in FIGS. 3 and 4, the separator plate 400 has a disc shape and an inlet hole 410 penetrating back and forth in the center portion.

As shown in FIGS. 3, 4, and 6, the suction housing 500 has a cylindrical shape that is opened rearward, and a plurality of suction holes 510 are radially penetrated while being spaced apart along the circumferential direction. The suction hole 510 may be formed on a surface of the suction housing 500 facing forward.

The separator plate 400 is located between the suction housing 500 and the mixing unit 200. The size of the inlet hole 410 is formed smaller than the interval between the inner end of the rotary blade 320. When the inlet hole 410 is formed in a circular shape, the size of the inlet hole 410 is formed to be smaller than the gap between the inner ends of the rotary blade part 320.

The aeration device according to an embodiment of the present invention is provided in the water, when the motor 130 is driven, the output occurs in the radial direction in accordance with the rotation of the impeller 300, the water in the water to the suction hole 510 This is sucked, at this time, foreign matter larger than the suction hole 510 is blocked from entering the suction housing 500.

And, the water introduced into the suction housing 500 is introduced into the mixing unit 200 through the inlet hole 410 of the separator plate 400, so that the size of the inlet hole 410 is small, The speed of the water moving from the suction housing 500 to the inlet hole 410 becomes faster.

As shown in FIGS. 3 and 4, the air inlet 600 is provided through the rear of the suction housing 500 and has a hollow inlet tab 610 in which one side and the other side are opened. A hollow inlet pipe part 630 connected to the front side of the inlet tab part 610 and open at one side and the other side thereof, and a hollow extension connected to the rear side of the inlet tab part 610 and extending toward the mixing part 200. It consists of a pipe part 650. The extension pipe part 650 extends through the inlet hole 410. A gap is formed in the radial direction between the extension pipe part 650 and the inlet hole 410.

The inflow tab 610 may be a metal pipe, and the inflow pipe 630 and the extension pipe 650 may be a pipe of a flexible material.

A gap t is formed in the longitudinal direction between the rear end portion of the extension pipe part 650 and the support tab part 330. One end of the inflow pipe 630 is exposed to air so that air is introduced, and the inflow air flows toward the impeller 300 via the inflow tab 610 and the extension pipe 650.

Accordingly, the air introduced from the extension pipe part 650 flows radially through the gap t formed between the end of the extension pipe part 650 and the support tab part 330 and is introduced into the air through the gap t. Will speed up.

The inlet pipe 630 is provided with an on-off valve (not shown), when the on-off valve is operated in a closed state, the aeration device according to the present invention can be operated by an underwater pump.

Meanwhile, as illustrated in FIGS. 3 and 4, the mixing part 200 is provided with a discharge part 700 communicating with the discharge hole 230 on an outer circumferential surface thereof.

The discharge part 700 is a hollow discharge tab portion 710 of one side and the other side is open so as to communicate with the discharge hole 230, and a hollow discharge pipe portion connected to the discharge tab portion 710, one side and the other side is open. 730.

The discharge tab part 710 may be provided integrally with the mixing part 200.

The discharge pipe part 730 may be composed of a large diameter portion 731 forming the first half and a small diameter portion 735 forming the second half, and the radial length of the small diameter portion 735 is the radius of the large diameter portion 731. It may be formed smaller than the directional length.

Therefore, when a fluid such as water flows into the discharge pipe part 730, when the fluid flowing through the large diameter part 731 flows into the small diameter part 735, the cross-sectional area in the radial direction of the small diameter part 735 is increased. Since the large diameter portion 731 is smaller than the cross-sectional area in the radial direction, high pressure is formed relatively to the large diameter portion 731 and low pressure is formed relatively to the small diameter portion 735.

7 is a cross-sectional view illustrating the operation state of the aeration apparatus according to an embodiment of the present invention, Figure 8 is a perspective view showing another form of the discharge pipe portion constituting the aeration apparatus according to an embodiment of the present invention. .

When the aeration device is made as described above, as shown in Fig. 7, it is installed in water such as sewage or waste water.

In this case, the inflow pipe 630 extends out of the water surface to receive external air, and the wire 140 also extends out of the water surface to be connected to a power source.

Subsequently, when the impeller 300 is rotated by supplying power to the motor 130, air is introduced into the inlet pipe part 630 whose end is exposed to air.

Subsequently, when thrust is generated in a radial direction according to the rotation of the impeller 300, water in the water is sucked through the suction hole 510. In this case, foreign matter larger than the suction hole 510 may be sucked into the suction housing 500. Is blocked).

Water introduced into the suction housing 500 is introduced into the mixing unit 200 through a gap formed between the inlet hole 410 and the extension pipe part 650 of the separation plate 400, the inlet hole 410 and By forming a passage area formed between the extension pipe part 650 smaller than the area of the entire suction hole 510, the speed of the water flowing through the gap formed between the inlet hole 410 and the extension pipe part 650 becomes faster. In addition, the air flowing into the inflow pipe part 630 also passes through a gap t formed between the inflow pipe part 630 and the support tab part 330, thereby increasing the speed.

In addition, the water introduced through the gap formed between the inlet hole 410 and the extension pipe 650, and the air introduced through the gap (t) formed between the inlet pipe 630 and the support tab 330 is rotated The blades 320 are mixed with each other while flowing in the radial direction.

Subsequently, the air flows through the gap (t) introduced through the gap formed between the inlet hole 410 and the extension pipe part 650, and the air is finely separated and mixed with the water. The gap t is preferably formed in the range of 3 mm to 4 mm. If the gap t is smaller than 3 mm, there is a problem that sufficient air is not introduced. If the gap t is larger than 4 mm, the speed of the air flowing through the gap t is not large and the air is rotated. It must be crushed and mixed with water by means of wealth but there was a problem.

Subsequently, as the impeller 300 rotates, water mixed with fine air collides with the surface of the rotor blade 320 to be mixed again, thereby increasing the mixing ratio of the fine air and water.

Subsequently, the water mixed with the fine air is mixed while flowing radially by the radial thrust of the impeller 300 and flows to the discharge hole 230.

Water mixed with the fine air flowing into the discharge hole 230 flows to the discharge pipe part 730 through the discharge tab part 710, and is smaller than the radial length of the large diameter part 731. Since the radial length of Rx is relatively small, a high pressure is formed in the large diameter portion 731 as compared with the small diameter portion 735.

Since the gas has a high efficiency of dissolving in the liquid at high pressure, the mixing ratio of the fine air and water in the large diameter portion 731 is further increased, and the water mixed with the fine air is discharged into the water.

Therefore, by supplying the external air to the sewage or waste water in the form of micro-bubbles, the air can stay in the water for a long time, and the amount of dissolved oxygen is increased to continuously cultivate aerobic microorganisms to promote aerobic fermentation.

On the other hand, the discharge pipe portion 730, as shown in Figure 8, may be provided by compressing the second half of the pipe extending in the front and rear direction.

When water mixed with fine air flows from the first half of the cylindrical form to the second half, the portion extending from the first half to the second half becomes a compressed state, thereby reducing the cross-sectional area in the radial direction.

Therefore, a high pressure is formed in the first half relative to the second half, so that the mixing ratio of the fine air and water is further increased in the first half, and the water mixed with the fine air is discharged into the water.

In the above description, the present invention has been described with reference to preferred embodiments, but the present invention is not necessarily limited thereto, and a person having ordinary skill in the art to which the present invention pertains does not depart from the technical spirit of the present invention. It will be readily appreciated that various substitutions, modifications and variations can be made.

100: casing 110: mixing section
130: motor 135: drive shaft
230: discharge hole 300: impeller
500: suction housing 510: suction hole
600: air inlet

Claims (8)

A hollow casing 100 provided in the water and in which the motor 130 is built;
A mixing part 200 installed at the front side of the casing 100 and opening forward, and having a discharge hole 230 formed therein, the driving shaft 135 of the motor 130 extending through the front from the rear;
An impeller 300 rotatably installed in the mixing part 200 and fastened to the driving shaft 135 to generate a flow in a radial direction of the mixing part 200;
A suction housing 500 installed at the front side of the mixing part 200 and having a hollow opening to the rear thereof and having a plurality of suction holes 510 formed therein; And
An air inlet 600 is installed to penetrate the rear of the suction housing 500 and inflows external air to face the impeller 300.
Aeration device characterized in that configured to include. According to claim 1, The impeller 300, the rotating plate portion 310, the support tab portion 330 is formed protruding forward from the rotating plate portion 310, the end of the drive shaft 135 is inserted, and the rotating plate An aeration device, characterized in that it consists of a plurality of rotary blades 320 protruding toward the support tab portion 330 from the outside of the portion 310 protruding forward of the rotating plate portion (310). The method of claim 2,
The air inlet 600 is a tube provided penetrating from the front of the suction housing 500 to the rear, the front end of the tube is exposed to the air and the rear end extends into the mixing unit 200. Aeration device characterized in that. According to claim 3, The tubular body is provided through the front of the suction housing 500 through the rear and the inlet tab portion 610 of one side and the other side is open and connected to the front side of the inlet tab portion 610 One side and the other side is connected to the rear side of the hollow inlet pipe portion 630 and the inlet tab portion 610, the one side and the other side, and the one side and the other side extending so as to form a gap (t) between the support tab portion 330 Aeration device, characterized in that consisting of an open hollow extension pipe 650. According to claim 4, Between the mixing portion 200 and the suction housing 500 is provided a disk-shaped separating plate 400 is formed with an inlet hole 410 penetrating back and forth, the extension of the tube portion 650 A rear end portion of the aeration device characterized in that extending through the inlet hole (410). According to claim 1, wherein the mixing portion 200 is provided with a discharge portion 700 in communication with the discharge hole 230, the discharge portion 700 is in communication with the discharge hole 230 one side and the other side The aeration apparatus characterized in that the hollow discharge tab portion 710 and the hollow discharge pipe portion 730 connected to the discharge tab portion 710 and one side and the other side are open. According to claim 6, The discharge pipe portion 730 is composed of a large diameter portion 731 forming the first half and a small diameter portion 735 forming the second half, the radial length of the small diameter portion 735 is the large diameter portion Aeration device characterized in that formed smaller than the radial length of (731). The aeration device according to claim 6, wherein the discharge pipe part 730 is provided by compressing a second half of the pipe extending in the front-rear direction.

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