JPH0531495A - Injecting equipent for aeration and chemical feeding - Google Patents

Abstract

PURPOSE:To uniformly mix the mixture of air and chemicals at high concentration by selecting the spouting form optimum to the respective environments and performing aeration and chemical feeding even when the environment of aeration and chemical feeding or the like differ. CONSTITUTION:The base end part of a closed-end hollow conical nozzle main body 1 is provided with a first fluid supply port 6 directed in the tangential direction of a cone, a second fluid supply port 7 directed in the direction of the axial line C of the cone and a mixture introducing port 8 directed in the direction of the axial line C. A spouting port 3 directed in the direction of the axial line C of the cone is provided to the top part of the nozzle main body 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an aeration / injection device for injecting a mixture of air or chemicals into a cone-shaped hollow nozzle.

[0002]

2. Description of the Related Art Conventionally, for example, an apparatus shown in FIG. 8 has been known as an apparatus for performing aeration and chemical injection for purifying moats and ponds or improving water quality. This apparatus has an underwater motor 20 and a propeller 21 rotated by the underwater motor 20, and a mixture injection port 22 for injecting a mixture 22a such as air or a drug is disposed near the center behind the propeller 21. It has a structure. According to this device, the water is stirred by the rotation of the propeller 21 to be ejected as a cone-shaped swirl flow S, and air or a chemical agent is discharged from the mixture injection port 22 to a low pressure region near the center of the swirl flow S of water. The mixture 22a is injected, and the mixture 22a is mixed with the swirling flow S and ejected, whereby aeration, chemical injection, and the like are performed.

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,
It is not possible to select the optimal jet shape for different aeration and chemical injection environments and perform aeration and chemical injection. Naturally, the effect of aeration and chemical injection fluctuates and varies depending on the environment, so the range of use is limited.

On the other hand, the mixing of the mixture 22a with the swirling flow S is performed better as the swirling speed increases. That is,
The larger the swirling speed, the faster the mixing speed of the mixture 22a with respect to the swirling flow S, the better the melted state, and the more uniform and uniform mixing of the mixture 22a. 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 mixture 22a with respect to the swirling flow S becomes slower and the melted state also deteriorates, so that the mixture 22a cannot be mixed with high concentration and evenly. Therefore, the effect of aeration and chemical injection is hindered. In addition, 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 main body is complicated.

[0005]

The problem to be solved by the present invention is that since the swirl flow jet form is steady, the optimum jet form for each different aeration / chemical injection environment is selected. And the like, since the upper limit of the swirling speed is relatively low, the mixing speed of the mixture with respect to the swirling flow is slow and the melted state also deteriorates, so that the mixture cannot be mixed at high concentration and evenly. There are various points such as the structure of the main body is complicated.

[0006]

According to a first aspect of the present invention, a nozzle body having a bottomed hollow conical nozzle body is provided with a jet outlet in the axial direction of the cone, and the base end portion of the nozzle body is tangential to the cone. Is provided with a first fluid supply port that faces toward, a second fluid supply port that faces toward the axial direction of the cone, and a mixture injection port that faces toward the axial direction.

The invention according to claim 2 is characterized in that a spacer is provided on the axis from the base end portion of the nozzle body to the ejection port, and an annular space is formed at the ejection port. To do.

Further, the invention of claim 3 is characterized in that the mixture injection port is provided on the axis.

[0009]

According to the invention of claim 1, the fluid tangentially entering the inside of the nozzle body from the first fluid supply port rotates inside the conical nozzle body, and the fluid flows toward the nozzle at the top of the nozzle. The turning speed is increased by being squeezed on the inner surface of the main body. The fluid has a large tangential velocity and ejects from the ejection port,
The centrifugal force generated by the high-speed swirl forms a high-speed swirl flow that spreads in a cone shape in the radial direction of the nozzle body and jets. The fluid that has entered the inside of the nozzle body in the axial direction from the second fluid supply port has a predetermined axial velocity and is ejected from the ejection port at the top. In this case, the opening angle of the swirl flow and the axial arrival distance are determined by the tangential velocity of the fluid supplied from the first fluid supply port in the nozzle body, 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, by squeezing the fluid on the inner surface of the nozzle body, an extremely large swirling speed can be obtained, so that the mixing speed for the swirling flow of the mixture such as the air or the drug that has entered the inside of the nozzle body from the mixture inlet becomes faster, In the case of air, the size of the bubbles can be reduced, so that the melted state is improved and the mixture can be jetted with a high concentration and evenly mixed.

Further, according to the second aspect of the present invention, when the fluid is supplied from the first fluid supply port, a void formed by a vortex generated around the axis of the nozzle body (water due to a low pressure) It is possible to eliminate the cavity (caused by bubbles in which steam is separated from water) by the spacer.
The axial flow of the fluid supplied from the fluid supply port can be prevented from being disturbed by the air gap. Furthermore, since the axial speed can be made close to the magnitude of the turning speed,
The size of the opening angle θ can be freely changed.

Further, according to the third aspect of the invention, since the mixture injection port is provided in the low pressure region inside the nozzle body, the mixture can be injected by a self-priming type or a low pushing pressure.

[0012]

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 line A, in which the nozzle body 1 is shown.
Is formed in the shape of a hollow bottomed cone, has a water chamber 2 inside, and is provided with a jet port 3 facing the direction of the axis C of the cone at the top. In addition, a cylindrical spacer 4 is provided on the axis C from the base end portion of the nozzle body 1 to the ejection port 3, and the tip end portion thereof is slightly projected from the ejection port 3 to form an outer periphery of the spacer 4. An annular space 5 is formed with the inner circumference of the jet port 3. Further, at the base end portion of the nozzle body 1, a first fluid supply port 6 directed in the tangential direction of the cone is provided penetrating the peripheral wall 1a, and the bottom portion 1
The second fluid supply port 7 that passes through b and faces in the direction of the axis C of the cone
And an axially oriented mixture inlet 8 is provided. The first fluid supply port 6 and the second fluid supply port 7 are connected to a fluid supply source (pump) not shown,
High-pressure water is supplied from here. And the mixture inlet 8
Is connected to a mixture supply source (air compressor or pump) (not shown), and is configured to supply a mixture such as air or a drug from here.

With such a construction, the fluid is introduced into the inside of the nozzle body 1 tangentially from the first fluid supply port 6 after the fluid is installed in water with the axis C of the cone being horizontal, and the fluid is introduced into the conical nozzle. It rotates in the water chamber 2 of the main body 1 and is squeezed by the inner surface of the nozzle main body 1 toward the top jet port 3 to increase the swirling speed. Fluid has a large tangential velocity
A high-speed swirling flow S jetted from the nozzle and spread in a cone shape in the radial direction of the nozzle body 1 by the centrifugal force generated by the high-speed swirl.
It becomes a jet. On the other hand, the fluid that has entered the water chamber 2 of the nozzle body 1 from the second fluid supply port 7 in the axial direction is ejected from the ejection port 3 at the top with a predetermined axial velocity. In this case, the opening angle θ of the swirling flow S and the reaching distance L in the axial direction are as follows:
It can be arbitrarily adjusted by the relative relationship between the swirl velocity of the swirl flow S determined by the fluid supplied from the fluid supply port 6 and the axial velocity of the fluid supplied from the second fluid supply port 7. That is, as the swirling velocity of the fluid is increased with respect to the axial velocity of the fluid, the opening angle of the swirling flow S is increased and the axial reach distance L1 is shortened, as indicated by θ1 in FIG. As the axial velocity of the fluid approaches the swirling velocity of the fluid, the opening angle of the swirling flow S becomes smaller and the axial reaching distance L2 becomes longer, as indicated by θ2 in FIG. That is, the amount of fluid supplied from the first fluid supply port 6 and the second fluid supply port 7 is adjusted to adjust the relationship between the swirl velocity and the axial velocity of the fluid, thereby changing the jet shape of the swirl flow S. It can be arbitrarily set to a form adapted to the environment.

On the other hand, since a very large swirling speed can be obtained by squeezing the fluid on the inner surface of the nozzle body 1, the mixture 9 such as air or a drug which has entered the inside of the nozzle body 1 from the mixture inlet 8 swirl flow. S will be mixed promptly. That is, the mixture 9 can be quickly mixed with the swirl flow S to improve the melted state, and the mixture 9 can be jetted with a high concentration and evenly.

As described above, the amount of fluid supplied from the first fluid supply port 6 and the second fluid supply port 7 is adjusted to adjust the relationship between the swirling speed of the fluid and the axial direction speed, thereby swirling. Since it is possible to arbitrarily set the jet form of the flow S to the form adapted to the environment, it is possible to perform the aeration and chemical injection by selecting the optimal jet form for each different aeration and chemical injection environment. Since the magnitude of the aeration / chemical injection effect does not fluctuate due to the difference in environment and does not vary, the range of use of the device is expanded and a large swirling speed is ensured so that the mixture 9 is highly concentrated and even. By mixing them, it is possible to greatly improve the aeration / medicine injection effect. Moreover, since the use of the driving unit can be omitted, the structure is simple.

Also, when the fluid is supplied from the first fluid supply port 6, the space formed around the axis C of the nozzle body 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 fluid supplied from being disturbed by the air gap. 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 use range of the device. This opening angle θ
The value of may be changed over time in order to efficiently perform aeration and chemical injection in the same water tank.

FIG. 5 shows a structure in which the mixture injection port 8 is provided on the rear side of the spacer 4 on the axis C of the nozzle body 1, and FIG. 6 shows the mixture injection port 8 on the axis C of the nozzle body 1. The structure provided in the intermediate portion of the spacer 4 in FIG. By providing the mixture injection port 8 at such a low pressure position, the mixture 9 can be unpoweredly drawn from the mixture injection port 8 and mixed with the fluid by the ejector effect.
Further, as shown in FIG. 7, by making the injection direction of the mixture countercurrent to the swirling direction of the fluid, a better mixed state can be obtained.

In the above embodiment, the mixture 9 such as air or medicine is separately injected from one mixture injection port 8, but a plurality of mixture injection ports 8 are provided. The mixture 9 of air and a drug or the like may be simultaneously injected. Further, the mixture injection port 8 may be provided at any position in the axial direction. Further, although the description has been given in the usage state in which the axis C of the cone is set horizontally in water to perform aeration and chemical injection, the present invention is not limited to the above embodiment, and the axis C of the cone is not limited thereto. Can be used as a dancing fountain by exposing the jet port 3 on the water surface with the vertical direction. Further, by making the axis C of the cone vertical and immersing the jet port 3 in the water downward,
It is also possible to focus aeration and chemical injection on the shallow or deep area below the surface of the water. Furthermore, by installing it on the ground,
It can be applied to sprinkling water or spraying insect repellents on golf courses and can also be used as a cleaning device.

[0019]

As described above, according to the invention of claim 1, the swirl 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. By adjusting the relative relationship of, the opening angle of the swirling flow and the axial reach can be adjusted arbitrarily,
It is possible to perform aeration and chemical injection by selecting the optimal jet mode for each different aeration and chemical injection environment. Therefore,
Since the magnitude of the aeration and chemical injection effect does not fluctuate and fluctuate due to the difference in the environment, the range of use of the device is expanded, and by ensuring a large swirling speed, the mixture is mixed at high concentration and evenly, Aeration and chemical injection effects can be significantly improved, and the use of a drive unit can be omitted, so that the structure is simple and the like.

Further, according to the second aspect of the invention, when the fluid is supplied from the first fluid supply port, the space generated around the axis of the nozzle body can be eliminated by the spacer. It is possible to prevent the axial flow of the fluid supplied from the fluid supply port from being disturbed by the gap.
Further, since the axial speed can be made close to the swirling speed, the adjustment range of the opening angle of the swirling flow and the reaching distance in the axial direction can be expanded, and the use range of the device can be further expanded.

Furthermore, according to the third aspect of the invention, the mixture can be withdrawn without force from the mixture injection port provided in the low pressure region inside the nozzle body and effectively mixed.

[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 vertical cross-sectional view showing a modified example of the installation position of the mixture injection port.

FIG. 6 is a vertical cross-sectional view showing another modification of the installation position of the mixture injection port.

FIG. 7 is a cross-sectional view showing another modification of the installation position of the mixture injection port.

FIG. 8 is a schematic configuration diagram of a conventional example.

[Explanation of symbols]

1 nozzle body 3 spouts 4 Spacers 5 annular space 6 First fluid supply port 7 Second fluid supply port 8 mixture inlet 9 mixture

Claims (3)

[Claims] 1. A nozzle body in the shape of a hollow cone with a bottom is provided with an outlet in the axial direction of the cone, and the base end of the nozzle body has a first fluid supply port directed in the tangential direction of the cone and an axis of the cone. An injection device for aeration, chemical injection, etc., which is provided with a second fluid supply port facing in the direction and a mixture injection port facing in the axial direction. 2. The aeration according to claim 1, wherein a spacer is provided on the axis from the base end portion of the nozzle body to the ejection port, and an annular space is formed at the ejection port.・ Medication injection device. 3. The aeration / aeration according to claim 1, wherein the mixture inlet is provided on the axis.
Injection device for chemical injection.