JP2017056438A - Aeration agitator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an aeration agitator which uses a simple and small device to efficiently conduct aeration and agitation.SOLUTION: An aeration agitator includes: a first pipeline 10 which takes water flow generated by a submerged pump to generate vortex flow by a vortex flow generation blade 5 disposed therein; a second pipeline 20 which is connected with the first pipeline 10 in a watertight state, has an inner diameter smaller than an inner diameter of the first pipeline 10, and is connected with a suction pipe for suctioning air from the outside; and a third pipeline 30 connected with the second pipeline 20 and having an inner diameter larger than an inner diameter of the second pipeline 20. The second pipeline 20 and the third pipeline 30 are connected through a fixing pin 8, and a space between an inner periphery of the third pipeline 30 and an outer periphery of the second pipeline 20 opens.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an aeration stirrer that is used by being submerged in water and that disintegrates and shears a gas-liquid containing air taken in from the outside, generates fine bubbles, performs aeration, and performs agitation.

  Conventionally, in order to purify the water quality, air is fed into the sewage and stirred for treatment. In this case, it is usual to use an apparatus such as a blower as the air supply means and to stir by power using a stirring blade or the like as the stirring means (see, for example, Patent Document 1).

JP 2003-53371 A

  However, the aeration stirrer described in Patent Document 1 uses a blower or a stirring blade, and thus has a problem that the number of parts of the device increases or the apparatus becomes large. It was. Moreover, since the stirring blade is simply rotated in water, it is difficult to perform efficient aeration and stirring.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide an aeration stirring apparatus capable of efficiently performing aeration and stirring using a simple and small apparatus.

  The present invention is an aeration stirrer that is used by being submerged in water and that disintegrates and shears a gas-liquid containing air taken in from the outside, generates fine bubbles and performs aeration, and performs agitation. A first pipe that takes in the water flow generated by the vortex and generates a vortex by a vortex generator blade disposed therein, and is connected to the first pipe in a watertight state and has an inner diameter smaller than the inner diameter of the first pipe. And a second pipe connected to an intake pipe for taking in air from the outside, and a third pipe connected to the second pipe and having an inner diameter larger than the inner diameter of the second pipe. The third pipe is connected via a fixing pin, and an opening is provided between the inner circumference of the third pipe and the outer circumference of the second pipe.

  According to this invention, the water flow generated by the submersible pump can be taken in, and the vortex flow can be generated in the first pipe by the vortex generation blade disposed inside.

  Further, since the first pipe and the second pipe are connected in a watertight state, and the inner diameter of the second pipe is smaller than the inner diameter of the first pipe, the flow velocity of the vortex flow passing through the first pipe is determined by Bernoulli's theorem. It will increase in two pipes. In addition to this, the vortex generated in the first pipe further accelerates along the pipe inner wall. As a result, the pressure in the second pipe decreases and a negative pressure is generated in the second pipe, so that air can be efficiently taken in from the intake pipe connected to the second pipe.

  Furthermore, a third pipe having an inner diameter larger than the inner diameter of the second pipe is connected to the second pipe, and the second pipe and the third pipe are connected via a fixing pin. Since there is an opening between the inner periphery and the outer periphery of the second pipe, the water flow is vigorously drawn by the Coanda phenomenon from the opening between the inner periphery of the third pipe and the outer periphery of the second pipe.

  Therefore, the air flow that vigorously flows through the third pipe caused by the Coanda phenomenon without impairing the effect of the fast flow rate due to the Bernoulli-Venturi effect generated by the first pipe and the second pipe and the efficient intake by the negative pressure generation, Since the liquid is efficiently collapsed and sheared and the bubbles are collapsed by the pressure in the pipe, fine bubbles can be generated. As a result, highly efficient aeration can be performed.

  Further, the water flow is drawn along the outer periphery of the third pipe by the Coanda phenomenon. As described above, in addition to the water flow ejected from the third pipe, high-efficiency stirring can be performed by the water flow flowing along the outer periphery of the third pipe. In other words, the third pipe plays the role of reducing the Bernoulli flow velocity and the role of the Coanda phenomenon at the same time.

  The present invention is an aeration stirrer that is used by being submerged in water and that disintegrates and shears a gas-liquid containing air taken in from the outside, generates fine bubbles and performs aeration, and performs agitation. A first pipe that takes in the water flow generated by the vortex and generates a vortex by a vortex generator blade disposed therein, and is connected to the first pipe in a watertight state and has an inner diameter smaller than the inner diameter of the first pipe. A second pipe connected to an intake pipe for taking in air from the outside, a third pipe connected to the second pipe in a watertight state and having an inner diameter larger than the inner diameter of the second pipe, and the third pipe A fourth pipe having an inner diameter greater than the inner diameter of the first pipe, the third pipe and the fourth pipe being connected via a fixing pin, and an inner circumference of the fourth pipe and an outer circumference of the third pipe, It is open between The features.

  According to this invention, the water flow generated by the submersible pump can be taken in, and the vortex flow can be generated in the first pipe by the vortex generation blade disposed inside.

  Further, since the first pipe and the second pipe are connected in a watertight state, and the inner diameter of the second pipe is smaller than the inner diameter of the first pipe, the flow velocity of the vortex flow passing through the first pipe is determined by Bernoulli's theorem. It will increase in two pipes. In addition to this, the vortex generated in the first pipe further accelerates along the pipe inner wall. As a result, the pressure in the second pipe decreases and a negative pressure is generated in the second pipe, so that air can be efficiently taken in from the intake pipe connected to the second pipe.

  Further, the second pipe and the third pipe are connected in a watertight state, and the inner diameter of the third pipe is larger than the inner diameter of the second pipe. Therefore, the first pipe, the second pipe, and the third pipe constitute a venturi pipe. Will do. Therefore, the gas-liquid containing the air taken in from the second pipe is efficiently collapsed and sheared in the third pipe, and the bubbles are collapsed by the pressure in the pipe, so that fine bubbles can be generated. it can. As a result, highly efficient aeration can be performed.

  Furthermore, the fourth pipe is connected to the third pipe and has an inner diameter larger than the inner diameter of the third pipe. The third pipe and the fourth pipe are connected via a fixing pin, Since there is an opening between the inner periphery and the outer periphery of the third pipe, the water flow is vigorously drawn by the Coanda phenomenon from the opening between the inner periphery of the fourth pipe and the outer periphery of the third pipe.

  Moreover, a water flow is drawn along the outer periphery of 4th piping by the Coanda phenomenon. As described above, in addition to the water flow ejected from the fourth pipe, high-efficiency stirring can be performed by the water flow flowing along the outer periphery of the fourth pipe. In other words, the fourth pipe plays the role of reducing the Bernoulli flow velocity and the role of the Coanda phenomenon at the same time.

  In the aeration and agitation device having the above-described configuration, the present invention is provided with a vortex generating blade provided obliquely with respect to the longitudinal direction of the first pipe inside the first pipe, and outside the second pipe, An intake pipe is connected through the second pipe obliquely with respect to the longitudinal direction of the second pipe.

  According to this invention, since the eddy current generating blade is provided in the first pipe obliquely with respect to the longitudinal direction of the first pipe, the water flow generated by the submersible pump is taken into the first pipe. In this case, a vortex can be efficiently generated with respect to this water flow. Further, since the eddy current is generated by the eddy current generating blade, it is not necessary to separately provide power for generating the eddy current, and the number of parts can be reduced.

  In addition, since the intake pipe is provided so as to penetrate the second pipe obliquely with respect to the longitudinal direction of the second pipe, it is in contact with the flow path of the water flow rather than connecting at right angles to the longitudinal direction of the second pipe. The cross-sectional area can be widened, and intake can be efficiently performed.

  ADVANTAGE OF THE INVENTION According to this invention, the aeration stirring apparatus which can perform aeration and stirring efficiently using a simple and small apparatus can be provided.

It is the schematic which shows 1st Embodiment of the aeration stirring apparatus of this invention. It is the schematic which shows 2nd Embodiment of the aeration stirring apparatus of this invention. It is the schematic which shows the usage example of the aeration stirring apparatus of this invention. It is the schematic which shows the other usage example of the aeration stirring apparatus of this invention.

Hereinafter, embodiments of the aeration and stirring apparatus according to the present invention will be described.
<First Embodiment>
As shown in FIG. 1, the aeration and agitation apparatus 1A of the present embodiment takes in a water flow generated by a submersible pump and generates a vortex by a vortex generator blade 5 disposed therein, and a first pipe 10 The second pipe 20 is connected to the pipe 10 in a watertight state, has an inner diameter smaller than the inner diameter of the first pipe 10, and is connected to the intake pipe 6 for taking in air from the outside. And a third pipe 30 having an inner diameter larger than the inner diameter of the two pipes 20.

  The aeration stirrer 1A of the present embodiment is used, for example, by being submerged in a slow-flowing river or closed water area that requires water purification, and the water flow taken into the first pipe 10 is, for example, a submersible pump (not shown) A water flow generated by power such as is suitable.

  Note that the output of the submersible pump and the dimensions of the pipe are set according to the target to which the aeration and stirring device 1A is used. As an example, the output of the submersible pump is 0.25 kW, the inner diameter of the first pipe 10 is 40 mm, the second For example, the inner diameter of the pipe 20 may be set to about 25 mm.

  The first pipe 10 is a cylindrical pipe formed of, for example, a vinyl chloride pipe.

  Inside the first pipe 10, a vortex generator blade 5 for generating a vortex is provided obliquely with respect to the longitudinal direction of the first pipe 10.

  The eddy current generating blade 5 is a plate-like body formed of a metal plate or the like, and in this embodiment, two eddy current generating blades 5 are formed.

  The eddy current generating blade 5 is formed, for example, by forming two cuts in a metal flat plate and raising the portions constituting the blade 5 to desired angles. Thereafter, a cylindrical tube 50 with a blade formed by rolling this plate into a cylindrical shape is disposed upstream in the first pipe 10 and generates an optimum vortex by keeping a certain distance from the socket 7 with a different diameter. Can do.

  In addition, as a metal flat plate constituting the cylindrical tube 50 with a blade, a copper plate or a stainless steel plate is suitable for ease of processing, but the entire cylindrical tube 50 with a blade is integrally formed with a synthetic resin using a 3D printer. You may do it.

  The inclination angle between the vortex generating blade 5 and the longitudinal direction of the first pipe is preferably set to about 30 degrees. Furthermore, although the eddy current generating blade 5 shown in FIG. 1 is a flat plate-like body, a plate-like body having a slightly curved tip is suitable for generating an efficient eddy current.

  The second pipe 20 is a cylindrical pipe formed of, for example, a vinyl chloride pipe, and is connected to the first pipe 10 in a watertight state via the different diameter socket 7.

  An intake pipe 6 that takes in air from outside is connected to the outside of the second pipe 20 through the second pipe 20 obliquely with respect to the longitudinal direction of the second pipe 20.

  The intake pipe 6 is a cylindrical pipe formed of, for example, a synthetic resin, and a pair of intake pipes 6 and 6 are provided so as to face each other.

  Note that the number of intake pipes 6 is not limited to the two described above, and may be two or more.

  The inclination angle between the intake pipe 6 and the longitudinal direction of the second pipe 20 is preferably set in the range of about 50 degrees to 80 degrees, and more preferably in the range of about 60 to 70 degrees.

  Thus, since the intake pipe 6 is connected through the second pipe 20 obliquely with respect to the longitudinal direction of the second pipe 20, rather than being connected at a right angle to the longitudinal direction of the second pipe 20. The contact cross-sectional area with respect to the flow path of the water flow can be widened, and intake can be efficiently performed.

  The intake pipe 6 is preferably formed of a soft resin material in consideration of handling convenience. However, when formed of a soft material, the degree of freedom of handling of the intake pipe 6 is high, so that it may exceed 90 degrees with respect to the longitudinal direction of the second pipe 20 depending on how it is pulled. As described above, when the angle exceeds 90 degrees, the intake efficiency is extremely lowered, and in some cases, the water flow may flow into the intake pipe 6 and the intake may be stopped. In consideration of such a problem, it is preferable to set the angle within the above range. Furthermore, the insertion depth of the intake pipe 6 is 1 mm to 3 mm from the inner wall of the second pipe 20 when the output of the submersible pump is 0.25 kW, the inner diameter of the first pipe 10 is 40 mm, and the inner diameter of the second pipe 20 is 25 mm. The protruding state is suitable, and the position to be connected is preferably about 120 mm in the longitudinal direction of the second pipe 20.

  A valve 60 is provided at the base end of the intake pipe 6 so that the opening of the intake pipe 6 can be adjusted.

  As described above, since the eddy current generating blade 5 is provided in the first pipe 10 at an angle with respect to the longitudinal direction of the first pipe 10, it is efficient with respect to the water flow taken into the first pipe 10. Eddy currents can be generated. Further, since the eddy current is generated by the eddy current generating blade 5, it is not necessary to separately provide power for generating the eddy current, and the number of parts can be reduced.

  In addition, the first pipe 10 and the second pipe 20 are connected in a watertight state, and since the inner diameter of the second pipe 20 is smaller than the inner diameter of the first pipe 10, the flow velocity of the vortex flowing through the first pipe 10 is According to Bernoulli's theorem, it increases in the second pipe 20. In addition, the vortex generated in the first pipe 10 further accelerates along the pipe inner wall. As a result, the pressure in the second pipe 20 decreases and a negative pressure is generated in the second pipe 20, so that air can be efficiently taken in from the intake pipe 6 that is obliquely connected to the second pipe 20. .

  The third pipe 30 is a cylindrical pipe formed of, for example, a vinyl chloride pipe, has an inner diameter larger than the inner diameter of the second pipe 20, and is connected to the second pipe via the fixing pin 8. An opening is formed between the inner periphery of 30 and the outer periphery of the second pipe 20.

  The amount of the second pipe 20 entering the third pipe 30 is desirably set to the minimum distance that can be fixed. This is because, by setting in this way, in addition to being able to generate a suitable Coanda effect, it is important for producing a venturi effect.

  Moreover, since the internal diameter of the 3rd piping 30 is set larger than the internal diameter of the 2nd piping 20, the 1st piping 10, the 2nd piping 20, and the 3rd piping 30 will comprise a venturi pipe, and a venturi There is an effect. Therefore, negative pressure is generated in the second pipe 20, and air can be efficiently taken in from the intake pipe 6 that is obliquely connected to the second pipe 20.

  The inner diameter of the third pipe 30 is preferably set to the same size as the first pipe 10.

  For example, screws such as two bolts are used for the fixing pin 8 so that the ejection direction can be adjusted.

  Therefore, when the aeration stirrer 1A is submerged in, for example, a closed water area, the water flow is vigorously drawn from the opening between the inner periphery of the third pipe 30 and the outer periphery of the second pipe 20 due to the Coanda phenomenon. .

  Therefore, the water flow that vigorously flows through the third pipe 30 generated by the Coanda phenomenon without impairing the effect of the high flow rate due to the Bernoulli Venturi effect generated by the first pipe 10 and the second pipe 20 and the efficient intake by the negative pressure generation. As a result, the gas and liquid are efficiently sheared, and the bubbles are collapsed by the pressure in the pipe, so that fine bubbles can be generated. As a result, highly efficient aeration can be performed.

  The microbubbles generated here are microbubbles having a diameter of about 10 to several tens of micrometers, or microbubbles having a diameter of several tens of micrometers and millibubbles of about 1 to 3 mm.

  However, the operation of limiting the generated fine bubbles to micro bubbles is possible by adjusting the intake air amount by the valve 60. However, in order to raise dissolved oxygen with high efficiency, it is much more efficient to fully open the valve 60 to generate both microbubbles and millibubbles and to maximize the intake amount.

Furthermore, a water flow is drawn along the outer periphery of the 3rd piping 30 by the above-mentioned Coanda phenomenon. Thus, in addition to the water flow which ejects from the 3rd piping 30, the highly efficient stirring can be performed by the water flow which flows along the outer periphery of the 3rd piping 30. FIG.
Second Embodiment
As shown in FIG. 2, the aeration and agitation device 1 </ b> B of the present embodiment takes in a water flow generated by a submersible pump and generates a vortex by a vortex generator blade 5 disposed therein, and a first pipe 10. Connected to the pipe 10 in a watertight state, connected to the second pipe 20 having an inner diameter smaller than the inner diameter of the first pipe 10 and connected to an intake pipe 6 for taking in air from the outside, and to the second pipe 20 in a watertight state. The third piping 30 having an inner diameter larger than the inner diameter of the second piping 20 and the fourth piping 40 having an inner diameter larger than the inner diameter of the third piping 30 are provided.

  Since the first pipe 10, the second pipe 20, and the intake pipe 6 have the same configuration as the above-described first embodiment, the description of the same part is omitted, and different parts will be described in detail.

  The third pipe 30 is a cylindrical pipe formed of, for example, a vinyl chloride pipe, and is connected to the second pipe 20 in a watertight state via a different diameter socket 71.

  Since the inner diameter of the third pipe 30 is set larger than the inner diameter of the second pipe 20, the first pipe 10, the second pipe 20, and the third pipe 30 constitute a venturi pipe, and the venturi effect is obtained. Play. Therefore, negative pressure is generated in the second pipe 20, and air can be efficiently taken in from the intake pipe 6 that is obliquely connected to the second pipe 20.

  The inner diameter of the third pipe 30 is preferably set to the same size as the first pipe 10.

  In addition, when the output of the submersible pump is 0.25 KW, when the inner diameter of the first pipe 10 is 40 mm and the inner diameter of the second pipe 20 is 25 mm, the inner diameter of the third pipe 30 is preferably set to 40 mm.

  And since the gas-liquid containing the air taken in from the intake pipe 6 is crushed by the vortex flowing through the second pipe 20 and the third pipe 30, the bubbles are collapsed by the pressure in the pipe. Fine bubbles are generated. The water flow containing the fine bubbles thus generated is ejected from the third pipe 30 and flows into the fourth pipe 40.

  Unlike the 3rd piping 30 arrange | positioned so that there may exist a Coanda effect and a venturi effect in 1st Embodiment, the 4th piping 40 in this embodiment is arrange | positioned only for the Coanda effect. For this reason, the Coanda effect is higher in efficiency than the first embodiment because the pipe diameter of the fourth pipe 40 is also increased.

  The fourth pipe 40 is a cylindrical pipe formed of, for example, a vinyl chloride pipe, has an inner diameter larger than the inner diameter of the third pipe 30, is connected to the third pipe 30 via the fixing pin 81, and An opening is formed between the inner periphery of the pipe 40 and the outer periphery of the third pipe 30.

  The fixing pin 81 uses, for example, screws such as two bolts, and the ejection direction can be adjusted.

  Therefore, when the aeration stirrer 1B is used by being submerged in, for example, a closed water area, water in water is vigorously drawn by the Coanda phenomenon from the opening between the inner periphery of the fourth pipe 40 and the outer periphery of the third pipe 30. become.

Moreover, a water flow is drawn along the outer periphery of the 4th piping 40 by the Coanda phenomenon. Thus, in addition to the water flow which ejects from the 4th piping 40, highly efficient stirring can be performed by the water flow which flows along the outer periphery of the 4th piping 40. FIG.
<Other usage examples>
The above-mentioned aeration stirring apparatus can be used by appropriately changing the piping according to the required stirring ability and the like.

  For example, the aeration stirrer 1C shown in FIG. 3 uses a first pipe 10, a second pipe 20, and a third pipe 30. The first pipe 10 and the second pipe 20 are connected via a socket 7 having a different diameter. The second pipe 20 and the third pipe 30 are connected in a watertight state via a different diameter socket 71.

  Since this aeration stirrer 1C constitutes a normal Venturi tube, it does not exhibit the Coanda phenomenon as in the first embodiment and the second embodiment described above, and is therefore suitable when a large stirring capacity is not required. Used.

  Moreover, in the aeration stirring apparatus 1D shown in FIG. 4, the first pipe 10 and the second pipe 20 are used, and the first pipe 10 and the second pipe 20 are connected in a watertight state via the different diameter socket 7. Yes.

  In this aeration stirrer 1D, in order to reduce the pressure of the intake pipe 6 connecting portion in the second pipe 20 without constituting a normal venturi pipe, the length of the second pipe 20 is extended, and a normal venturi pipe is formed. It is intended to cause the same phenomenon as.

  Further, since the water flow is ejected from the second pipe 20 in the aeration and agitation device 1D, it is possible to eject the water flow containing fine bubbles at a high flow rate while reducing the diameter of the ejection nozzle. Therefore, in addition to being particularly preferably used when washing solid matter, the ejection portion 53 and the nozzle in Japanese Patent No. 5192608 “Water purification device and water purification method using this water purification device” by the inventors of the present application. It is possible to replace it with 70.

  As described above, since the aeration and agitation apparatus of the present invention can employ various embodiments, it can be implemented by appropriately recombining piping according to the usage environment and demand, and is highly convenient. In addition to closed water areas, it is also suitable for purifying wastewater from rivers, domestic wastewater, food factories, etc., aeration for aquaculture, high pressure washing nozzles, and the like.

1A, 1B, 1C, 1D Aeration and stirring device 10 First pipe 20 Second pipe 30 Third pipe 40 Fourth pipe 5 Eddy current generating blade 6 Intake pipe 8 Fixing pin

It is the schematic which shows the reference example of the aeration stirring apparatus of this invention. The implementation form of aeration stirring device of the present invention is a schematic diagram showing. It is the schematic which shows the usage example of the aeration stirring apparatus of this invention. It is the schematic which shows the other usage example of the aeration stirring apparatus of this invention.

Hereinafter, reference examples and embodiments of the aeration and agitation apparatus according to the present invention will be described.
< Reference example >
As shown in FIG. 1, the aeration and agitation device 1A of the present reference example takes a water flow generated by a submersible pump and generates a vortex by a vortex generator blade 5 disposed therein, The second pipe 20 is connected to the pipe 10 in a watertight state, has an inner diameter smaller than the inner diameter of the first pipe 10, and is connected to the intake pipe 6 for taking in air from the outside. And a third pipe 30 having an inner diameter larger than the inner diameter of the two pipes 20.

The aeration stirrer 1A of the present reference example is used, for example, by being submerged in a slow river or closed water area that requires water purification, and the water flow taken into the first pipe 10 is, for example, a submersible pump (not shown) A water flow generated by power such as is suitable.

The eddy current generating blade 5 is a plate-like body formed of a metal plate or the like, and in this reference example , two eddy current generating blades 5 are formed.

Furthermore, a water flow is drawn along the outer periphery of the 3rd piping 30 by the above-mentioned Coanda phenomenon. Thus, in addition to the water flow which ejects from the 3rd piping 30, the highly efficient stirring can be performed by the water flow which flows along the outer periphery of the 3rd piping 30. FIG.
<Implementation form>
As shown in FIG. 2, the aeration and agitation device 1 </ b> B of the present embodiment takes in a water flow generated by a submersible pump and generates a vortex by a vortex generator blade 5 disposed therein, and a first pipe 10. Connected to the pipe 10 in a watertight state, connected to the second pipe 20 having an inner diameter smaller than the inner diameter of the first pipe 10 and connected to an intake pipe 6 for taking in air from the outside, and to the second pipe 20 in a watertight state. The third piping 30 having an inner diameter larger than the inner diameter of the second piping 20 and the fourth piping 40 having an inner diameter larger than the inner diameter of the third piping 30 are provided.

Since the first pipe 10, the second pipe 20, and the intake pipe 6 have the same configuration as that of the above-described reference example , description of the same part is omitted, and different parts will be described in detail.

Unlike the third pipe 30 arranged to exhibit the Coanda effect and the Venturi effect in the reference example , the fourth pipe 40 in the present embodiment is arranged exclusively for the Coanda effect. For this reason, the Coanda effect is higher in efficiency than the reference example because the diameter of the fourth pipe 40 is also increased.

The aeration stirring device 1C, since constitute the ordinary venturi, since there is no possible to obtain the Coanda phenomenon like reference example and implementation embodiment described above is suitably used when that does not require a large agitation capabilities.

Claims (3)

An aeration stirrer that is used by being submerged in water, disintegrating and shearing gas-liquid containing air taken in from the outside, generating fine bubbles and performing aeration,
A first pipe that takes in a water flow generated by a submersible pump and generates a vortex by a vortex generator blade disposed inside;
A second pipe connected to the first pipe in a watertight state, having an inner diameter smaller than the inner diameter of the first pipe, and connected to an intake pipe for taking in air from the outside;
A third pipe connected to the second pipe and having an inner diameter larger than the inner diameter of the second pipe;
The aeration stirrer characterized in that the second pipe and the third pipe are connected via a fixing pin, and an opening is provided between the inner circumference of the third pipe and the outer circumference of the second pipe. An aeration stirrer that is used by being submerged in water, disintegrating and shearing gas-liquid containing air taken in from the outside, generating fine bubbles and performing aeration,
A first pipe that takes in a water flow generated by a submersible pump and generates a vortex by a vortex generator blade disposed inside;
A second pipe connected to the first pipe in a watertight state, having an inner diameter smaller than the inner diameter of the first pipe, and connected to an intake pipe for taking in air from the outside;
A third pipe connected to the second pipe in a watertight state and having an inner diameter larger than the inner diameter of the second pipe;
A fourth pipe having an inner diameter larger than the inner diameter of the third pipe,
The aeration stirrer characterized in that the third pipe and the fourth pipe are connected via a fixing pin, and an opening is provided between the inner circumference of the fourth pipe and the outer circumference of the third pipe. In the aeration stirrer according to claim 1 or 2,
In the first pipe, a vortex generating blade is provided obliquely with respect to the longitudinal direction of the first pipe,
An aeration stirrer characterized in that an intake pipe is connected to the outside of the second pipe through the second pipe obliquely with respect to the longitudinal direction of the second pipe.

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