JPH06492A - Aerator - Google Patents

Abstract

PURPOSE:To perform aeration optimum in the each environment even when the environment of aeration differs and also to uniformly mix air at high concentration. CONSTITUTION:A first fluid supply port 6 and a second fluid supply port 7 are provided in the base end part of a closed-end cylindrical body 1 uniform in inner size. The first fluid supply port 6 is opened in the tangential direction of the cylindrical body 1. The second fluid supply port 7 is opened in the direction of the axial line C of the cylindrical body 1. An injection port 3A opened in the direction of the axial line C is provided in the top part of the cylindrical body 1. The annular space 5 is formed in the injection port 3A by providing a spacer 4 inside the injection port 3A. Further an air passage 4A is formed in the spacer 4 in the axial direction of the spacer 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an aeration device for mixing air with a fluid and injecting it.

[0002]

2. Description of the Related Art Conventionally, as an apparatus for performing aeration for purifying a moat or a pond or improving water quality, for example, FIG.
Those shown in are known. This device is used for underwater motor 2
0 and a propeller 21 rotated by the underwater motor 20. Air 2 is provided near the center behind the propeller 21.
It has a structure in which an air inlet 22 for injecting 2a is arranged. According to this device, the water is stirred by the rotation of the propeller 21 and jetted as a cone-shaped swirl flow S, and the air 22a is injected from the air inlet 22 into the low pressure region near the center of the swirl flow S of water. Aeration is performed by mixing the air 22a with the swirling flow S and ejecting the mixed air.

However, in the above-mentioned conventional apparatus, the relationship between the radial spread amount of the cone-shaped swirling flow S and the axial length thereof, that is, the opening angle θ of the swirling flow S and the axial reaching distance L thereof.
Is constrained invariably by the swirling velocity of the swirling flow S determined by the tangential velocity of the propeller 21. Therefore, for example, it is not possible to adjust the relative relationship such that the opening angle θ is increased to decrease the axial reach distance L, or the opening angle θ is decreased to increase the axial reach distance L. Therefore, the jet shape of the swirling flow S becomes steady,
Aeration cannot be performed by selecting the optimum jet shape for each different aeration environment. As a matter of course, the magnitude of the aeration effect fluctuates and varies depending on the difference in the environment, so that the range of use is limited.

On the other hand, the mixing of the air 22a with the swirling flow S is better performed as the swirling speed increases. That is, the larger the swirling speed, the faster the mixing speed of the air 22a with respect to the swirling flow S, the better the melted state, and the better the air 22a.
Can be mixed at a high concentration and evenly. However, in the rotation system of the propeller 21, the upper limit of the swirling speed of the swirling flow S is limited to a relatively low level. Therefore, the mixing speed of the air 22a with respect to the swirling flow S becomes slower and the melted state also decreases, so that the air 22a cannot be mixed with high concentration and evenly. Therefore, the aeration effect is hindered. Further, the conventional device requires a drive unit such as the underwater motor 20 and the propeller 21, and thus has a drawback that the structure of the device is complicated.

[0005]

The problem to be solved is that the swirling flow jet shape is stationary, and therefore it is not possible to aerate by selecting the optimum jet shape for each different aeration environment. Since the upper limit of the swirling speed is relatively low, the mixing speed of the air with respect to the swirling flow is slow and the melted state is also lowered, so that the air cannot be mixed at a high concentration and evenly, and the structure is complicated. There are various points.

[0006]

According to the present invention, there is provided a first fluid supply port which is provided with an axial jet port at the top of a bottomed tubular body and which is open at the base end of the tubular body in the tangential direction of the tubular body. And at least one second fluid supply port that opens in the axial direction, a spacer is provided in the ejection port to form an annular space at the ejection port, and the spacer penetrates the spacer in the axial direction. It is characterized in that an air passage is formed.

[0007]

According to the present invention, the fluid (water) entering the inside of the bottomed cylinder from the first fluid supply port in the tangential direction rotates inside the cylinder and is ejected with a large tangential velocity. . The ejected fluid swirls at high speed in the radial direction of the cylindrical body due to the centrifugal force generated by the swirling at high speed, and spreads in a cone shape. The fluid (water) entering the inside of the cylinder from the second fluid supply port in the axial direction has a predetermined axial velocity and is ejected from the ejection port at the top. In this case, the opening angle and the axial reach of the swirl flow are determined by the tangential velocity of the fluid supplied from the first fluid supply port in the cylinder, and the swirl flow is supplied from the second fluid supply port. It can be arbitrarily adjusted by adjusting the relative relationship with the axial velocity of the fluid. That is, the greater the swirl velocity of the fluid with respect to the axial velocity of the fluid, the greater the opening angle of the swirl flow, and the greater the axial velocity of the fluid, the greater the axial reach. on the other hand,
When the fluid is ejected from the ejection port, the pressure at the front portion of the tip of the spacer is reduced to a low pressure region. Air is sucked from the air passage of the spacer by the self-priming action accompanying the generation of the low pressure region and mixed with the fluid ejected from the ejection port. The larger the swirling speed of the fluid, the smaller the size of the bubbles and the faster the mixing speed of the air with the fluid, so that the state of the melted air becomes better and the air is jetted with a high concentration and even mixing. be able to. That is, by adjusting the swirling speed of the fluid, it is possible to secure the optimum mixed state of air for different aeration environments and perform aeration.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a vertical cross-sectional view of the present invention, and FIG.
FIG. 3 is a sectional view taken along the line a, in which the cylindrical body 1 is formed in a bottomed cylindrical shape with a uniform inner diameter, has a water chamber 2 inside, and has a jet port that opens in the direction of the axis C at the top. A lid 3 forming 3A is provided. From the base end of the cylinder 1 to the spout 3
A cylindrical spacer 4 is provided on the axis C up to A, and the hollow portion of the spacer 4 has a function as an axial air passage 4A. The tip of the air passage 4A is slightly projected from the ejection port 3A, and the outer periphery of the spacer 4 and the inner periphery of the ejection port 3A form an annular space 5. On the other hand, a first fluid supply port 6 that opens in the tangential direction of the tubular body 1 is provided at the base end portion of the tubular body 1.
Is provided so as to penetrate through the peripheral wall 1a, and the second fluid supply port 7 that penetrates through the bottom portion 1b of the cylindrical body 1 and opens in the direction of the axis C is provided. The first fluid supply port 6 and the second fluid supply port 7
Is connected to a fluid supply source (pump) (not shown), from which high-pressure water is supplied.

With such a structure, the axis C of the cylindrical body 1
Is placed horizontally in water, and then water is supplied to the first fluid supply port 6 and the second fluid supply port 7 by the fluid supply source. Water tangentially entering the inside of the tubular body 1 from the first fluid supply port 6 rotates in the water chamber 2 and jets from the jet outlet 3A with a large tangential velocity, and the centrifugal force generated by the high speed swirling causes the tubular A high-speed swirl flow S spreading in a cone shape in the radial direction of the body 1 is jetted. On the other hand, the water that has entered the water chamber 2 of the cylindrical body 1 from the second fluid supply port 7 in the axial direction is jetted from the top jet port 3A with a predetermined axial velocity. in this case,
The opening angle θ of the swirling flow S and the axial reach distance L are determined by the swirling velocity of the swirling flow S determined by the water supplied from the first fluid supply port 6 and the axis of the water supplied from the second fluid supply port 7. It can be arbitrarily adjusted by the relative relationship with the directional speed. That is, as the swirling speed of water increases with respect to the axial speed of water, the swirling flow S increases as indicated by θ1 in FIG.
Of the swirl flow S becomes smaller as the axial velocity of the water becomes closer to the swirling velocity of the fluid. Thus, the reachable distance L2 in the axial direction becomes long. That is, by adjusting the amount of water supplied from the first fluid supply port 6 and the second fluid supply port 7 to adjust the relationship between the swirling speed of water and the axial speed, the jet form of the swirling flow S is changed to the environment. It can be arbitrarily set to a form adapted to.

On the other hand, when water is ejected from the ejection port 3A, the pressure at the front part of the tip of the spacer 4 is lowered to a low pressure region. Due to the self-priming action associated with the generation of this low pressure range
The air is sucked from the air passage 4A of the servicer 4 and mixed with the water ejected from the ejection port 3A. By adjusting the amount of water as described above, the larger the swirling speed of water, the smaller the size of the bubbles and the faster the mixing speed of air with the jet water, so that the state of air penetration will improve and the air concentration will increase. Moreover, it is possible to evenly mix and eject. That is, by adjusting the swirling speed of water, it is possible to aerate while ensuring the optimum mixed state of air for different aeration environments.

As described above, the swirling flow is adjusted by adjusting the amount of water supplied from the first fluid supply port 6 and the second fluid supply port 7 to adjust the relationship between the swirling speed of water and the axial speed. Since it is possible to arbitrarily set the jet shape of S to the shape adapted to the environment, it is possible to aerate by selecting the optimum jet shape for different aeration environments. It fluctuates due to differences and does not vary. Therefore, the range of use of the device is expanded and the use of the drive unit can be omitted, so that the structure is simple.

Further, when water is supplied from the first fluid supply port 6, the space formed around the axis C of the cylinder 1 can be eliminated by the spacer 4, so that the second fluid supply port 7 It is possible to avoid the axial flow of the water supplied from being disturbed by the voids. Further, the spacer 4 can increase the axial speed to approach the turning speed. Therefore, the adjustment range of the opening angle θ of the swirl flow S and the axial reaching distance L can be expanded to further expand the range of use of the device.

In the above embodiment, the cylindrical body 1 is described as being formed into a bottomed cylindrical shape having a uniform inner diameter. However, the cylindrical body 1 is a polygonal bottomed rectangular tube having a uniform inner dimension. May be formed. Moreover, the axis C of the cylinder 1 is set horizontally and installed in water.
Although the description has been given in the use state in which aeration and chemical injection are performed, the present invention is not limited to the above-mentioned embodiment, and the cylindrical body 1 is used.
By immersing the jet port 3A downward in the water with the axis C of the vertical direction, the aeration can be focused on the shallow layer region or the deep layer region below the water surface. Further, when installed on the ground, it can be applied to sprinkling water on a golf course or spraying insect repellent, and can also be used as a cleaning device. Further, in place of the air passage 4A having the tip opening used in the above-mentioned embodiment, that is, the air passage 4A capable of obtaining the axial flow, the air passage 4A having a structure capable of closing the tip to obtain the radial flow is used. Good.

[0014]

As described above, according to the present invention, the relative relationship between the swirling speed of the fluid supplied from the first fluid supply port and the axial speed of the fluid supplied from the second fluid supply port is adjusted. By doing so, the opening angle of the swirling flow and the reaching distance in the axial direction can be arbitrarily adjusted, so that it is possible to perform aeration by selecting an optimal jet mode for different aeration environments.
Therefore, since the magnitude of the aeration effect does not fluctuate and fluctuate depending on the environment, the range of use of the device is expanded, and a large swirling speed is ensured, so that the mixture is mixed at a high concentration and evenly, and aeration is performed. The effect can be significantly improved, and the use of the driving unit can be omitted, so that the structure is simple.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is an explanatory diagram showing an example of a jet flow state in which the opening angle of the swirling flow is increased.

FIG. 4 is an explanatory diagram showing an example of a jet flow state in which the opening angle of the swirling flow is reduced.

FIG. 5 is a schematic configuration diagram of a conventional example.

[Explanation of symbols]

 1 Cylindrical Body 3A Jet Port 4 Spacer 4A Air Passage 5 Annular Space 6 First Fluid Supply Port 7 Second Fluid Supply Port

Claims (1)

[Claims] 1. A bottomed tubular body is provided with an axial jet outlet at the top thereof, a proximal end portion of the tubular body is provided with a first fluid supply port opening in the tangential direction of the tubular body, and is opened in the axial direction. At least one second fluid supply port is provided, a spacer is provided in the ejection port to form an annular space in the ejection port, and an air passage that penetrates in the axial direction is formed in the spacer. Aeration device.