CN108064216B

CN108064216B - Aeration machine

Info

Publication number: CN108064216B
Application number: CN201580080737.1A
Authority: CN
Inventors: 文元镐; 成旺气; 尹智贤
Original assignee: Ek Co ltd
Current assignee: Ek Co ltd
Priority date: 2015-08-12
Filing date: 2015-12-09
Publication date: 2021-08-27
Anticipated expiration: 2035-12-09
Also published as: CN108064216A; WO2017026590A1

Abstract

The present invention can provide an aerator, comprising: a rotary drive motor; a shaft into which external air flows; a turbine blade unit having a plurality of blades which are connected to the tip end of the shaft and rotate, and generate bubbles by colliding air supplied through the shaft when the air is ejected to the outside, each of the plurality of blades is formed as a block-type blade having an air inlet and a plurality of air outlets communicating with the shaft, and having an internal space in which air flows, and is provided with an extension shaft, which is provided through the central shaft of the rotary driving motor, is formed into a hollow tube connected to the shaft, supplies external air, thereby forming an inner space for air to flow into the block-type blade to enlarge the contact surface of air and water, mixing of air and water is facilitated, and generation of fine bubbles by collision is facilitated, and prevents the air suction inlet from being blocked by foreign matters, and can prevent damage due to abnormal vibration even if rotating at high speed, thereby providing a structurally safe aerator.

Description

Aeration machine

Technical Field

The present invention relates to an aerator, and more particularly, to an aerator which generates fine bubbles as centrifugal rotational force of turbine blades by rotational driving of a motor, is stable even when the motor rotates at a high speed, and can easily generate fine bubbles from a block-type blade.

Background

Generally, an aerator (aerator) is a device widely used in a sewage treatment plant, a livestock wastewater treatment plant, a nuclear power plant wastewater treatment plant, or the like, and functions to increase the concentration of dissolved oxygen and circulate water, thereby generating bubbles in water.

Such aerators are used to treat wastewater to increase the Dissolved Oxygen (DO) content of the water. It is necessary to maintain the amount of dissolved oxygen at a predetermined value or more, not only for preserving the life of fish or other aquatic organisms, but also for deodorizing or suppressing the generation of organic substances, and such an aerator is very useful in increasing the amount of dissolved oxygen and has a great utility value particularly in the case of a high biochemical oxygen demand.

Such conventional aerators include an air diffusion aerator which causes air or pure oxygen to flow into water through a submersible porous diffusion member or a nozzle, and a mechanical aerator which causes water to be disturbed to dissolve air in the atmosphere. Among mechanical aerators, a turbine impeller type aerator is widely used which uses a rotating impeller provided at a predetermined depth below the water surface of the treated water and supports a breather pipe coaxially with the impeller to supply outside air to the water around the impeller.

As such a conventional turbine impeller type aerator, there is disclosed an aerator comprising: a shaft composed of a double tube of an inner tube and an outer tube; a blower (blower) connected to an outer pipe of the shaft to forcibly inject air; a motor connected to the inner tube of the shaft to rotate the inner tube; and a propeller disposed at an end of the inner tube. However, since such a conventional aerator needs to include a blower for injecting air into the shaft, there has been a problem that not only the whole apparatus becomes complicated and bulky, but also the movement and installation of the equipment become complicated.

Therefore, in order to solve the above problems, there has been proposed a self-suction type aerator in which the shaft is not formed of a double pipe of an outer pipe and an inner pipe, but an air inlet is provided at an upper end of one shaft, a blower is omitted, a centrifugal force is generated by rotation of a propeller or blades provided at a distal end of the shaft by rotation of the shaft by the motor, and air in the shaft is ejected to the outside by the centrifugal force and collides with the blades, thereby generating air bubbles.

However, the aerator according to the above-described conventional art is configured to flow air in through the air suction port provided at the upper end of the shaft rotating at a high speed, and thus the shaft may be damaged due to abnormal vibration or the like.

Further, although the structure is such that the air flowing in through the shaft is generated as fine bubbles by the rotation of the blades provided at the tip of the shaft and the centrifugal force caused by the rotation, there is a problem in that it is difficult to adjust the size of the bubbles or the flow direction of the bubbles.

Disclosure of Invention

Technical problem

The present invention has been made to solve the above-mentioned problems of the prior art, and an object of the present invention is to provide a structurally safe aerator which can prevent a shaft from being damaged even when rotating at a high speed.

Another object of the present invention is to provide an aerator which can easily generate fine bubbles.

Technical scheme

To achieve the above object, an aerator according to the present invention includes: a rotary drive motor; a shaft connected to the rotation driving motor, rotated by the rotation driving motor, and allowing external air to flow therein; and a turbine blade unit including a plurality of blades which are connected to a tip end of the shaft to rotate and generate air bubbles by colliding air supplied through the shaft when the air is ejected to the outside, wherein each of the plurality of blades is a block-type blade having an air inlet and a plurality of air outlets communicating with the shaft, and having an internal space in which air flows.

ADVANTAGEOUS EFFECTS OF INVENTION

According to the present invention having the above-described configuration, the blades of the turbine blade unit are formed as block-type blades having an internal space, and the internal space into which air flows is formed in the block-type blades to increase the contact surface between air and water, so that mixing of air and water is facilitated, and generation of fine bubbles by collision can be facilitated.

Further, as described above, instead of supplying air through the air inlet provided on one side of the shaft that rotates at a high speed as in the prior art, the aerator can be provided with a structure in which an extension shaft penetrating the rotary drive motor is provided on the central shaft of the rotary drive motor, and external air is supplied to the shaft through the extension shaft, thereby preventing the air suction port from being clogged with foreign matter, and preventing damage due to abnormal vibration even when rotating at a high speed.

Drawings

Fig. 1 is a perspective view showing an aerator provided with a block-type blade according to the present invention.

Fig. 2 is a view showing an aerator provided with a connector according to the present invention.

Fig. 3 is a diagram showing an example of a block-type blade according to the present invention.

Fig. 4 is a diagram showing another example of a block-type blade according to the present invention.

Fig. 5 is a view showing an aerator according to another embodiment of the present invention.

Fig. 6 to 8 are diagrams illustrating various blade shapes of the embodiment of fig. 5.

Fig. 9 and 10 are views illustrating a guide protrusion of the embodiment of fig. 5.

Detailed Description

The aerator of the invention is characterized by comprising: a rotary drive motor; a shaft connected to the rotation driving motor, rotated by the rotation driving motor, and allowing external air to flow therein; and a turbine blade unit including a plurality of blades which are connected to a tip end of the shaft to rotate and generate air bubbles by colliding air supplied through the shaft when the air is ejected to the outside, wherein each of the plurality of blades is a block-type blade having an air inlet and a plurality of air outlets communicating with the shaft, and having an internal space in which air flows.

Wherein each of the block-type blades is formed to be inclined toward the center of the turbine blade portion.

Wherein each of the block-type blades is formed to be inclined with respect to a height direction of the turbine blade portion, and is formed to have an inclination angle gradually increased toward a center of the turbine blade portion.

Further, the aerator is characterized in that each of the block-type blades is formed such that widths of upper and lower portions of the block-type blade are different from each other.

Wherein the aerator is characterized in that the rotary driving motor comprises: and an extension shaft which is provided through a central shaft of the rotary drive motor, is formed as a hollow tube connected to the shaft, and supplies external air.

Wherein the aerator is characterized by further comprising: and a housing fastened to the rotary drive motor and provided to surround the extension shaft extending and protruding upward from an upper surface of the rotary drive motor.

Wherein the aerator is characterized by further comprising: a connection pipe connected to the extension shaft; and a regulating valve provided at one side of the connection pipe to regulate supply of air flowing into the extension shaft and the shaft.

Wherein the shaft further includes a connector having an inner diameter larger than an outer diameter of the shaft body, and connecting adjacent shaft bodies, and a plurality of propellers are formed outside the connector.

The aerator with the block-type blades according to the present invention will be described in detail below by way of examples with reference to the accompanying drawings.

< example 1>

As shown in fig. 1 to 4, an aerator 1 of the present invention includes a rotary drive motor 10, a shaft 20, and a turbine blade 30.

The rotary driving motor 10 drives and rotates the shaft 20 and the turbine blade 30, and one end of the shaft 20 is fastened to the rotary driving motor 10 through a first coupling flange 11.

In this embodiment, an extension shaft 12 is provided on a central shaft of the rotary drive motor 10. The extension shaft 12 is provided to penetrate through a center shaft of the rotary drive motor. The extension shaft 12 is formed by a hollow pipe instead of a motor shaft of a conventional motor, the extension shaft 12 is provided to vertically penetrate the rotation driving motor 10 on a central axis, and a lower end of the extension shaft 12 is connected to the shaft 20.

In the conventional aerator, the motor has a motor shaft of a round bar, and an air suction port is formed at one side of the upper part of the shaft so that air flows in through the air suction port, but since the distance between the air suction port and the water surface is short, not only may a phenomenon that foreign matters may flow in from the water surface through the air suction port to block the air suction port occur, but also, since the air suction port is formed at the shaft which rotates at a high speed, abnormal vibration may occur to the shaft due to the inflow air with the high-speed rotation of the air suction port, and the structure may be damaged.

However, the aerator of the present embodiment forms the extension shaft 12 penetrating the rotation driving motor 10 and connected to the shaft so that external air can flow in through the extension shaft provided at the center axis of rotation and protruding toward the upper surface side of the rotation driving motor 10, and thus can solve the problem that the air suction port is blocked by foreign substances, and even if the shaft rotates at a high speed, the air flows in through the center axis of rotation, and thus can prevent abnormal vibration from occurring at the time of inflow.

On the one hand, a housing 50 may be further provided at an upper portion of the rotary drive motor 10. The housing 50 is configured to be fastened to the rotary drive motor 10 by a second coupling flange 51 on an upper surface of the rotary drive motor 10.

The housing 50 is provided in a manner of surrounding the protruding portion 12a of the extension shaft 12 provided in a manner of extending and protruding from the upper surface of the rotation driving motor to the upper side.

In addition, a connection pipe 53 may be fastened to the housing 50. The connection pipe 53 is fastened to the housing and the extension shaft 12 through a bearing 52. In addition, a regulating valve 54 may be further provided at one side of the connection pipe 53, which regulates the supply of air flowing into the extension shaft and the shaft.

Accordingly, not only the extension shaft can be protected from external impact by the housing 50, but also foreign substances of the external air can be prevented from flowing in by providing a filter in the connection pipe 53, and a gas such as oxygen or nitrogen can be supplied in addition to air as required through the connection pipe 53, and other liquid or gaseous medicines can be easily injected.

Further, the amount of air or gas flowing into the shaft 20 can be adjusted by the on-off valve 54, and thus the pressure or amount of bubbles generated in the turbine blade portion can be adjusted.

The shaft 20 is connected to the rotation driving motor to be rotated by the rotation driving motor, and external air flows in.

The shaft 20 may be formed of one shaft having a predetermined length, but a plurality of shafts may be connected to each other according to the vertical center of the place where the aerator is installed. In this case, as shown in fig. 3, the shaft may be configured such that a plurality of shafts are connected by a connector 60.

The connector 60 is configured to have an inner diameter corresponding to an outer diameter of a shaft body, and may be configured to have a screw thread formed on an outer peripheral surface of a distal end of the shaft 20 and a screw thread formed on an inner surface of the connector 60 so that a plurality of shafts are screwed and fastened by the connector 60, for example.

Further, a plurality of propellers 61 may be formed at the outside of the connector 60. When the connector 60 is rotated by the rotation of the shaft 20, the propeller 61 is also rotated, thereby preventing the propeller 61 from sending the atmosphere to the water surface when it is positioned on the water surface to induce scum or foam which may be generated on the water surface, and guiding the flow of water in the water when it is positioned in the water to a predetermined direction.

The turbine blade section 30 is provided at a lower end of the shaft 20 via a connecting portion 40. The upper plate 31 and the lower plate 32 of the turbine blade are assembled by being fastened and fixed by an upper fixing flange 41 and a lower fastening portion 42 of the connecting portion 40, respectively.

A plurality of blades 33 are provided between the upper plate 31 and the lower plate 32 of the turbine blade section 30.

Each of the plurality of blades 33 is preferably formed as a block-type blade having an internal space in which air flows. As shown in fig. 3, the block-type vane 33 has an air inflow port 33a communicating with the shaft 20 and a plurality of

air outflow ports

33b, 33c formed in the side wall and the outer side wall.

Thus, the air flowing in through the air inlet port 33a formed in the block-type blade 33 and the water in the water flowing in through the

air outlet ports

33b and 33c are contacted and mixed in the inner space of the block-type blade. When the block-type blades 33 are rotated by the rotation of the shaft 20, the water and air contacted and mixed in the inner space of the block-type blades 33 flow out of the turbine blade part through the

air outlet ports

33b and 33c, and at this time, the water and air are mixed by the high-speed rotational force to generate fine bubbles.

On the one hand, as shown in fig. 3, each of the block-type blades 33 may be formed to be inclined toward the center of the turbine blade portion. By forming the block-type blades to be inclined at a plurality of inclination angles, the air flowing in through the shaft 20 can flow more smoothly to the outside of the turbine blade portion, and the water and air flowing into the internal space of the block-type blades can be more smoothly flowed out to the outside of the block-type blades when the turbine blade portion rotates at a high speed.

Further, as shown in fig. 9, each of the block-type blades may be formed as an inclined block-type blade 33' formed to be inclined in a height direction of the block-type blade.

The inclined block-type blade 33' may be formed to have a predetermined angle θ with respect to a height direction of the block-type blade, that is, with respect to upper and lower plates of the turbine blade portion, and the angle θ may be formed to be gradually increased toward a center of the turbine blade portion.

Further, the upper and lower portions of the inclined block-type blade 33' may be configured to have different widths, and may be formed to have a narrow upper portion and a wide lower portion.

Accordingly, when fine bubbles are generated by the high-speed rotation of the turbine blade portion, the inclined block-type blades 33' provided obliquely can not only guide the flow direction of water including the fine bubbles in a predetermined direction, but also can cause the fine bubbles and water flowing out through the air outlet 33b of the side wall to collide with the lower plate of the turbine blade portion or the adjacent inclined block-type blades to further generate fine bubbles.

< example 2>

In one aspect, fig. 5 to 10 are views illustrating another embodiment of an aerator of the present invention. In the present embodiment, the structure is the same as that of embodiment 1 described above except for the structure of the blade, and thus, a duplicate description will be omitted.

In the present embodiment, the blades 34 of the turbine blade unit 30 are connected to the tip end of the shaft to rotate, and when the air supplied through the shaft 20 is ejected to the outside through the space between the blades, the air collides with the blades to generate bubbles.

Each of the blades 34 may be formed in a polygonal shape having a tip formed toward the center of the turbine blade portion as shown in fig. 6, may be formed in a rectangular shape as shown in fig. 7, or may be formed in a shape in which the height gradually decreases from one side to the other side as shown in fig. 8.

Further, each of the plurality of blades is provided with a guide projection 35 formed to project outward from the blade body. The guide projection 35 is provided obliquely to the center of the turbine blade.

Further, as shown in fig. 10, the guide protrusions 35 may be disposed at various angles toward the center of the turbine blade portion.

Thus, the flow direction or strength of the generated bubbles can be adjusted by the guide protrusions provided obliquely to the blade body of the turbine blade portion. That is, air flowing in through the shaft is mixed with water flowing between the blades along the guide protrusions by a centrifugal force generated by rotation of the turbine blade portions to generate air bubbles, and the generated air bubbles are ejected to the outside at various angles according to inclination of the guide protrusions. Further, not only the blade but also the guide projection are collided, so that finer bubbles can be formed.

Therefore, the size of the fine bubbles or the flow direction of the fine bubbles can be easily adjusted by configuring the guide protrusions to have various sizes or inclinations.

The present invention described above is not limited to the above-described embodiments and drawings, and those skilled in the art to which the present invention pertains can understand that various substitutions, modifications, and alterations can be made without departing from the scope of the technical idea of the present invention.

Claims

1. An aerator, characterized in that it comprises:

a rotary drive motor;

a shaft connected to the rotation driving motor, rotated by the rotation driving motor, and allowing external air to flow therein; and

a turbine blade unit having a plurality of blades which are connected to a tip end of the shaft and rotate, and generate bubbles by colliding air supplied through the shaft when the air is ejected to the outside,

and each of the plurality of blades is a block-type blade having an air inflow port communicating with the shaft and a plurality of air outflow ports and having an internal space in which air flows,

the turbine blade section further includes upper and lower plates covering the plurality of blades from above and below and connected to the shaft,

each of the block-type blades is formed to be inclined with respect to a height direction so that a height thereof decreases toward a center of the turbine blade portion, and is formed so that an inclination angle thereof gradually increases toward the center of the turbine blade portion, and each of the block-type blades is formed such that widths of upper and lower portions thereof are different from each other.

2. The aerator of claim 1,

the rotary drive motor includes an extension shaft which is provided to penetrate through a central shaft of the rotary drive motor, is formed as a hollow tube connected to the shaft, and supplies outside air.

3. The aerator of claim 2, further comprising a housing fastened to the rotation driving motor and provided to surround the extension shaft extending and protruding upward from an upper surface of the rotation driving motor.

4. The aerator of claim 2, further comprising:

a connection pipe connected to the extension shaft; and

a regulating valve provided at one side of the connection pipe to regulate supply of air flowing into the extension shaft and the shaft.

5. The aerator of claim 1,

the shaft further includes a connector having an inner diameter larger than an outer diameter of the shaft body and connecting adjacent shaft bodies,

and a plurality of propellers are formed at the outer side of the connector.

6. The aerator of claim 1,

the plurality of blades are formed with guide projections instead of the block-type blades, and the guide projections are formed to protrude outward from the blade body and are provided to be inclined toward the center of the turbine blade portion.