JPH09206575A - Fluid injection device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fluid injection device capable of naturally enhancing agitation effect when a fluid such as a chlorine solution is injected, without using a driving power such as a motor. SOLUTION: The device for injecting a second fluid B1 into a first fluid A1, is provided with an impeller 4 arranged in the first fluid in freely rotatably, nozzles 7 being provided on a blade 6 of the impeller and imparting a rotational force to the impeller with the repulsion caused by jetting the fluid, flow path's 8, 9 communicating with the nozzles through the inside of a revolving shaft 5 of the impeller, and an injection pipe 10 for feeding the second fluid into the flow path by connecting the pipe to this flow path and jetting the second fluid from the nozzles.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluid injection device used when, for example, a chemical solution is injected into a stock solution.

[0002]

2. Description of the Related Art For example, in a seawater intake device, a chlorine solution (chemical solution) is injected into seawater (stock solution) in an intake pipe line to suppress the generation of algae and the like. In this case, conventionally, a fixed nozzle has been arranged in the pipe, and the chlorine solution has been injected into the seawater from the nozzle.

[0003]

However, there is a problem that the chlorine concentration varies when the chlorine solution is simply injected from the fixed nozzle. Therefore, it is conceivable to provide a motor-type stirring device, but there was a problem that the cost would increase.

In view of the above circumstances, it is an object of the present invention to provide a fluid injection device capable of enhancing the stirring effect when a chlorine solution is injected without using the power of a motor or the like.

[0005]

According to the first aspect of the present invention, there is provided the following:
In the device for injecting the second fluid into the first fluid, the impeller rotatably disposed in the first fluid and the blade of the impeller are provided, and the reaction force is generated by ejecting the fluid. A nozzle that applies a rotational force to the impeller, a flow path that communicates with the nozzle via the inside of the rotary shaft of the impeller, and the second fluid is sent to the flow path by being connected to this flow path. And an injection pipe for ejecting the second fluid from the nozzle.

According to a second aspect of the present invention, in the first aspect, the blade is inclined with respect to a plane orthogonal to the rotation axis of the impeller.

According to a third aspect of the present invention, in the second aspect, the first fluid is a fluid flowing in the pipe line, and the impeller has a posture in which the rotating surface of the blade intersects with the flow. The impeller of the impeller is arranged so that the direction of rotation of the impeller generated when the flow hits the inclined blade and the direction of rotation of the impeller generated by jetting of the fluid from the nozzle match. It is characterized in that the inclination direction of the blade is set.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. 1 is a cross-sectional view of a seawater intake pipe 2 equipped with a fluid injection device 1 according to a first embodiment, FIG.
FIG. 3 is a front view of the fluid injection device 1. Seawater A1, which is the first fluid, flows in the intake pipe 2 in the direction of arrow (a),
The fluid injection device 1 of the present invention is provided to inject the chlorine solution B1 as the second fluid into the seawater A1.

The fluid injecting device 1 is supported by the pipe wall of the water intake pipe 2 so that the bearing 3 is disposed at the center of the water intake pipe 2 and the impeller 4 rotatably supported by the bearing 3. And have. The impeller 4 has a rotating shaft 5 penetrating the bearing 3.
And a plurality of strip-shaped blades 6 provided at the tip thereof, and the rotation surface of the blades 6 is orthogonal to the flow direction of the seawater A1. Each blade 6 is inclined in a certain direction with respect to a surface (rotational surface of the blade 6) orthogonal to the rotation axis 5 of the impeller 4,
A rotational force is generated by the flow of seawater A1. At the trailing edge of each blade 6 in the rotational direction, a nozzle 7 is provided that gives a rotational force to the impeller 4 by its reaction force by ejecting a fluid. The inclination direction of each blade 6 is
The direction of rotation of the impeller 4 generated when the flow of the seawater A1 hits the inclined blades 6 and the direction of rotation of the impeller 4 generated by jetting of the fluid from the nozzle 7 are set to match each other. ing.

The nozzles 7 are arranged in a row along the rear edge of the blade 6, and are connected to the internal passage 8 of the rotary shaft 5 via the passage 9 inside the blade 6. The rear end of the rotary shaft 5 is connected to the tip of a chlorine solution B1 injection pipe 10 via a joint 11 that allows the rotation shaft 5 to rotate. The chlorine solution B1 is ejected from the nozzle 7 by feeding the chlorine solution B1 into the passage 8.

Next, the operation will be described. When the chlorine solution B1 is sent from the injection pipe 10, the chlorine solution B1 is jetted from the nozzle 7 of each blade 6, and the jet reaction force causes the impeller 4 to rotate by itself in the arrow (B) direction in FIG. The impeller 4 is rotated by the flow of the seawater A1. Then, while the impeller 4 rotates, the chlorine solution B1 is injected into the seawater A1, so that the stirring effect is enhanced and the variation in chlorine concentration is eliminated.

In the above embodiment, the first fluid (seawater A
Although the case where the impeller 4 of the fluid injection device 1 is arranged in the pipeline 2 in which 1) flows is shown, the fluid injection device of the present invention can also be applied to the case of injecting the chemical liquid into the storage tank. FIG. 3 shows a storage tank 2.
When injecting the chemical liquid B2 as the second fluid into the first fluid A2 stored in the second fluid A2, the fluid injecting device 21 according to the second embodiment of the present invention is used.

The fluid injection device 21 has an impeller 24 vertically inserted into the storage tank 22 from above. The impeller 24 is rotatably supported by a bearing 25 arranged in the center of the storage tank 22 and has a plurality of upper and lower blades 26 having horizontal rotation surfaces. Each blade 26 is inclined in a certain direction with respect to the rotation surface of the blade 26, and the rotation of the impeller 24 causes the first fluid A2 to generate a vertical flow. A large number of nozzles 27 are arranged in a row in each blade 26 as in the above embodiment, and the chemical liquid B2 sent from the injection pipe 30 is discharged from the nozzles 27 via the internal flow path of the rotary shaft 25 of the impeller 24. The impeller 24 is adapted to rotate by itself when ejected.

Also in this embodiment, the chemical solution B2 is supplied to the nozzle 27.
Since the impeller 24 rotates by itself when injected from above, the stirring effect is enhanced and the dispersion of the chemical concentration is eliminated.

In the above embodiment, the case where the first and second fluids are liquids has been described. However, the case where the second fluids are gases may be used in particular. For example, in sewage treatment equipment,
The fluid injecting devices 1 and 21 of the present invention can be used when sending air as the second fluid into the treated water that is the first fluid.

[0016]

As described above, according to the first aspect of the invention, when the second fluid is sent from the injection pipe, the second fluid is ejected from the nozzle and the impeller rotates by itself. It is possible to inject the second fluid into the first fluid while enhancing the stirring effect without using such power. Therefore, the second
It is possible to eliminate the variation in concentration when the fluid is injected with low-cost equipment. In particular, when the blades of the impeller are inclined as in the second aspect of the invention, a flow (axial flow) in the rotation axis direction can be generated in the first fluid, so that the stirring effect is further enhanced. . Further, when the first fluid is a flowing fluid, the direction of rotation of the impeller generated by the flow and the direction of rotation of the impeller due to ejection of the fluid from the nozzle When they are matched with each other, the rotation of the impeller is increased, and the stirring effect is further enhanced.

[Brief description of drawings]

FIG. 1 is a sectional view of a first embodiment of the present invention.

FIG. 2 is a view taken in the direction of arrows II-II in FIG.

FIG. 3 is a sectional view of a second embodiment of the present invention.

[Explanation of symbols]

 A1 Seawater (1st fluid) B1 Chlorine solution (2nd fluid) A2 1st fluid B2 Chemical liquid (2nd fluid) 1,21 Fluid injection device 2 Intake pipe line 4,24 Impeller 5,25 Rotating shaft 6,26 Blades 7,27 Nozzle 8,9 Flow path 10,30 Injection pipe

Claims (3)

[Claims] 1. A device for injecting a second fluid into a first fluid, comprising: an impeller rotatably disposed in the first fluid; A nozzle that gives a rotational force to the impeller by its reaction force by jetting, a flow path that communicates with the nozzle via the inside of the rotation shaft of the impeller, and by connecting to this flow path, A fluid injection device, comprising: an injection pipe that sends the second fluid to a flow path and ejects the second fluid from the nozzle. 2. The fluid injection device according to claim 1, wherein the blade is inclined with respect to a plane orthogonal to the rotation axis of the impeller. 3. The first fluid is a fluid flowing in a pipe line, and the impeller is arranged in the flow in a posture in which a rotating surface of the blade intersects with the flow. The inclination direction of the blades is set so that the rotation direction of the impeller generated by hitting the inclined blades and the rotation direction of the impeller generated by the ejection of the fluid from the nozzle coincide with each other. The fluid injection device according to claim 2, wherein