JP6151555B2 - Fluid suction mixing device - Google Patents

Description

  The present invention relates to a fluid suction and mixing device used for strongly sucking fluid or mixing two kinds of fluids at once.

  A technique for mixing ozone and water and dissolving ozone microbubbles as stable as possible in water has been put into practical use (Patent Document 1). Various techniques for mixing them are introduced (Patent Documents 2 to 5).

Utility model registration No. 3097617 JP 2008-142592 A JP 2009-247950 A JP 2012-91153 A JP2013-626A

The known prior art has the following problems to be solved.
The device of Patent Document 1 has a high gas-liquid mixing capability by inserting a thin tube into a Venturi tube and strongly sucking ozone gas. However, the water flowing into the venturi tube generates a turbulent flow and vibrates a thin tube for sucking ozone gas. As a result, abnormal noise is generated, and durability due to vibration fatigue of the tube is impaired.
In order to solve the above problems, an object of the present invention is to provide the following fluid mixing apparatus.
(1) To reduce the improper vibration of the mixing mechanism for mixing ozone in water.
(2) To provide a fluid mixing device that can strongly suck fluid or can be widely used for mixing liquid and gas or liquids.

  The following configurations are means for solving the above-described problems.

<Configuration 1>
A main body having a substantially circular channel in cross section for receiving the first fluid from one end side and sending it to the other end side;
A cylindrical nozzle that is disposed on the central axis of the flow path, receives a second fluid from one end side of the flow path, and discharges the second fluid into the first fluid in the flow path;
A nozzle support that semi-fixably supports the position of the discharge port for discharging the second fluid of the nozzle into the first fluid so that the position on the central axis can be adjusted;
The flow path has, in order from one end side of the flow path, a portion having an inner diameter D1, a portion having an inner diameter D2, and a portion having an inner diameter D3, and D1 and D2 are substantially equal or have a relationship of D1> D2.
D2 and D3 have a relationship of D2> D3,
The portion of the inner diameter D1 includes an inlet for receiving the first fluid in a tangential direction when viewed from a circular cross section perpendicular to the central axis of the flow path, and the inflowing first fluid causes a vortex around the nozzle. An eddy current forming portion to be formed, and an opening for pushing the first fluid to the portion of the inner diameter D2.
Between the portion of the inner diameter D2 and the portion of the inner diameter D3, there is an acceleration portion in which the inner diameter decreases linearly ,
The accelerating unit forms a spiral flow of the first fluid around the nozzle from the opening to the discharge port of the nozzle disposed therein .

<Configuration 2>
A main body having a substantially circular channel in cross section for receiving the first fluid from one end side and sending it to the other end side;
A cylindrical nozzle that is disposed on the central axis of the flow path, receives a second fluid from one end side of the flow path, and discharges the second fluid into the first fluid in the flow path;
A nozzle support that semi-fixably supports the position of the discharge port for discharging the second fluid of the nozzle into the first fluid so that the position on the central axis can be adjusted;
The flow path has, in order from one end side of the flow path, a portion having an inner diameter D1, a portion having an inner diameter D2, and a portion having an inner diameter D3, and D1 and D2 are substantially equal or have a relationship of D1> D2.
D2 and D3 have a relationship of D2> D3,
The portion of the inner diameter D1 includes an inlet for receiving the first fluid in a tangential direction when viewed from a circular cross section perpendicular to the central axis of the flow path, and the inflowing first fluid causes a vortex around the nozzle. An eddy current forming portion to be formed, and an opening for pushing the first fluid to the portion of the inner diameter D2.
A fluid mixing device having an accelerating portion in which the inner diameter decreases linearly between the inner diameter D2 and the inner diameter D3;
A spiral flow of the first fluid is formed around the nozzle from the opening of the accelerating unit to the discharge port of the nozzle disposed therein, thereby generating abnormal noise due to vibration of the nozzle. How to prevent.

<Effect of Configuration 1>
The velocity near the central axis of the vortex is the slowest. Moreover, pressure is applied in a direction toward the outer peripheral wall of the flow path, and the force that pushes the outer surface of the nozzle is weak. Therefore, the nozzle is stably supported on the central axis of the flow path and does not generate vibration.
<Effect of Configuration 2>
With this structure, the flow velocity of the first fluid in the vicinity of the nozzle outlet can be increased, so that the suction force for sucking the second fluid is high, and it can be used for a decompressor or the like.

(A) is a longitudinal cross-sectional view which shows the fluid mixing apparatus 10 of Example 1. FIG. (B) is a cross-sectional view along an AA line. It is explanatory drawing which showed the flow-velocity distribution of the 1st fluid in a flow path. It is a structure explanatory view of the mixing system of two kinds of fluids by the device of the present invention. 6 is a longitudinal sectional view showing a modified example of the fluid mixing apparatus 10. FIG.

  Hereinafter, embodiments of the present invention will be described in detail for each example.

FIG. 1A is a longitudinal sectional view showing a fluid mixing apparatus 10 according to the first embodiment. (B) is a cross-sectional view along an AA line.
The fluid mixing device 10 is a device for mixing a first fluid (for example, water) and a second fluid (for example, ozone gas). The white arrows shown in FIG. 5A indicate the inflow directions of the first fluid and the second fluid, and the discharge direction of the mixed fluid of both. This device receives the first fluid from one end side (right side in the figure) of the flow path and sends it out to the other end side (left side in the figure).

  The cross section of the flow path through which the first fluid is fed is substantially perfect throughout. As shown in the figure, the flow path includes a portion having an inner diameter D1, a portion having an inner diameter D2, and a portion having an inner diameter D3. The relationship between the inner diameters is as follows. D1 and D2 are substantially equal or have a relationship of D1> D2. D2 and D3 have a relationship of D2> D3.

  An inlet 18 for receiving the first fluid is provided in the portion of the inner diameter D1. As shown in FIG. 1B, the first fluid 32 flows in the tangential direction when viewed from a circular cross section perpendicular to the central axis of the flow path. The first fluid that has flowed from the inlet 18 forms a vortex around the nozzle 12. This part of the apparatus will be referred to as a vortex generator 20.

  As shown to Fig.1 (a), the nozzle 12 is arrange | positioned on the center axis | shaft of a flow path. The nozzle 12 is supported by a nozzle support 16. The nozzle 12 receives the second fluid from one end side of the flow path and discharges it from the discharge port 14 in the flow path. The nozzle support 16 has a known chuck function, and can fix the nozzle 12 or adjust the position of the nozzle 12 on the central axis. Accordingly, the position of the second fluid discharge port 14 can be adjusted. By this adjustment, the nozzle is positioned at a position where the suction force for sucking the second fluid is maximum.

  As shown in FIG. 1A, the first fluid is pushed out from the portion having the inner diameter D1 to the portion having the inner diameter D2 through the opening 22. The flow of the first fluid is indicated by a spiral broken line. Between the inner diameter D2 portion and the inner diameter D3 portion, the inner diameter of the flow path decreases smoothly. This portion will be referred to as the acceleration unit 24.

  When the first fluid flows into the vortex forming portion 20, a vortex is generated so as to go around the nozzle 12 at the portion of the inner diameter D1. This is as shown in FIG. The first fluid is pushed out from the opening 22 to the portion having the inner diameter D2 (acceleration unit 24).

  The first fluid travels through the acceleration unit 24 while forming a spiral flow around the nozzle 12. As shown in the figure, since the inner diameter of the flow path gradually decreases from upstream to downstream, the flow velocity of the first fluid is accelerated toward the downstream if the inflow amount of the first fluid per unit time is constant.

  Here, the case where the first fluid 32 travels straight through the accelerating portion 24 in the longitudinal direction of the nozzle 12 and the case where the first fluid 32 flows spirally around the nozzle 12 as in this embodiment are compared. As shown in FIG. 1B, when the first fluid 32 generates a vortex, the first fluid 32 advances so as to be pressed against the outer peripheral wall surface of the vortex generator 20 by centrifugal force.

FIG. 2 is an explanatory diagram showing the flow velocity distribution of the first fluid in the flow path.
The right side of the figure is the flow velocity distribution seen in the BB cross section of the flow path, and the left side of the figure is the flow velocity distribution seen in the CC cross section of the flow path. In either case, the flow velocity from the nozzle 12 to the outer peripheral wall surface of the acceleration unit 24 is shown. The solid line is the flow velocity distribution of the embodiment of FIG. 1, and the two-dot chain line is the flow velocity distribution when the first fluid is flowed linearly without winding a vortex. When the vortex is wound, a flow having a higher flow velocity is generated, and this exerts a higher suction force.

  Further, when the first fluid 32 advances in a vortex, a force equal to 360 degrees from the periphery is applied to the nozzle 12, so that the nozzle 12 is stably held on the central axis of the flow path. Therefore, vibration of the nozzle 12 can be suppressed. Assuming that the flow rate of the first fluid flowing through the accelerating portion 24 is equal and constant, the fluid velocity in the vicinity of the discharge rod 14 at the nozzle 12 is higher when the first fluid flows spirally around the nozzle 12. growing.

  Furthermore, as shown to (a) of FIG. 1, in the acceleration part 24, the internal diameter of a flow path reduces smoothly from D2 to D3. Therefore, the outer diameter of the spiral vortex when viewed from the side surface is gradually reduced and the pitch is gradually increased. Thus, since the shape of the spiral vortex changes in the longitudinal direction, the resonance frequency of each part is different, the vibrations cancel each other and no resonance phenomenon occurs. That is, there is no flow that increases the vibration of the nozzle 12.

  From the above, the nozzle 12 is stably supported on the central axis of the flow path and does not generate unnecessary vibration. Further, it is stably supported on the central axis of the flow path by the vortex. Furthermore, since the fluid flows while the fluid vortexes, it is difficult for turbulent flow to occur particularly around the nozzle. Therefore, it is possible to prevent the generation of abnormal noise due to the vibration of the nozzle.

  The flow path near the discharge port 14 of the nozzle 12 has an inner diameter that is several times the outer diameter of the discharge port 14. Accordingly, a high-speed flow is generated in the first fluid. Thereby, a strong suction force acts on the discharge port 14 of the nozzle 12, and the second fluid is ejected into the first fluid. Thus, the first fluid and the second fluid are mixed.

FIG. 3 is an explanatory diagram of a configuration of a mixing system of two kinds of fluids by the apparatus of the present invention.
As shown in the figure, for example, a first fluid such as water is accommodated in the water tank 40. On the other hand, a second fluid such as oxygen, hydrogen, carbon dioxide gas is accommodated in the gas cylinder 42. Then, the first fluid is sucked up by the pump 44 and supplied to the fluid mixing device 10 through the inlet 18 while adjusting the flow rate by the valve 46. The second fluid is also supplied to the fluid mixing device 10 through the nozzle 12 while adjusting the flow rate by the valve 48. In this way, two kinds of fluids can be mixed and used for a predetermined application.

  Note that the gas cylinder 42 can be replaced with, for example, an ozone production apparatus. Thereby, ozone can be dissolved in water in the state of nanobubbles. Further, if a tank or a device that requires decompression is disposed in the gas cylinder portion, a simple vacuum pump can be realized by hydraulic power. Therefore, it effectively functions as a fluid suction device.

FIG. 4 is a longitudinal sectional view showing a modification of the fluid mixing apparatus 10.
In the example of FIG. 1, the inner diameter D <b> 1 of the part where the inlet 18 is opened is sufficiently larger than the inner diameter D <b> 2 of the part of the boundary between the vortex forming part 20 and the acceleration part 24. In this embodiment, D1 is substantially equal to D2. Even with such a structure, it has been found that the first fluid (for example, water) smoothly flows in a spiral manner downstream as in the case of FIG.

  When compared with the structure of FIG. 1, the structure of FIG. 1 can send the first fluid to the acceleration unit 24 after forming a strong eddy current having a sufficiently large radius in the eddy current forming unit 20. . 1 can be said to have a high effect of preventing an irregular vortex generated immediately after the first fluid is sent to the vortex forming section 20 from flowing directly into the acceleration section 24.

  The present invention was developed as a mixer for dissolving ozone gas nanovalve in water, but widely used in various fields as a liquid-gas mixture, a liquid-liquid mixer, and a device that strongly sucks various fluids. Can do.

DESCRIPTION OF SYMBOLS 10 Fluid mixing apparatus 12 Nozzle 14 Ejection port 16 Nozzle support 18 Inflow port 20 Eddy current formation part 22 Opening part 24 Acceleration part 32 First fluid 40 Water tank 42 Cylinder 44 Pump 46 Valve 48 Valve

Claims (2)

A main body having a substantially circular channel in cross section for receiving the first fluid from one end side and sending it to the other end side;
A cylindrical nozzle that is disposed on the central axis of the flow path, receives a second fluid from one end side of the flow path, and discharges the second fluid into the first fluid in the flow path;
A nozzle support that semi-fixably supports the position of the discharge port for discharging the second fluid of the nozzle into the first fluid so that the position on the central axis can be adjusted;
The flow path has, in order from one end side of the flow path, a portion having an inner diameter D1, a portion having an inner diameter D2, and a portion having an inner diameter D3, and D1 and D2 are substantially equal or have a relationship of D1> D2.
D2 and D3 have a relationship of D2> D3,
The portion of the inner diameter D1 includes an inlet for receiving the first fluid in a tangential direction when viewed from a circular cross section perpendicular to the central axis of the flow path, and the inflowing first fluid causes a vortex around the nozzle. An eddy current forming portion to be formed, and an opening for pushing the first fluid to the portion of the inner diameter D2.
Between the portion of the inner diameter D2 and the portion of the inner diameter D3, there is an acceleration portion in which the inner diameter decreases linearly ,
The accelerating unit forms a spiral flow of the first fluid around the nozzle from the opening to the discharge port of the nozzle disposed therein . A main body having a substantially circular channel in cross section for receiving the first fluid from one end side and sending it to the other end side;
A cylindrical nozzle that is disposed on the central axis of the flow path, receives a second fluid from one end side of the flow path, and discharges the second fluid into the first fluid in the flow path;
A nozzle support that semi-fixably supports the position of the discharge port for discharging the second fluid of the nozzle into the first fluid so that the position on the central axis can be adjusted;
The flow path has, in order from one end side of the flow path, a portion having an inner diameter D1, a portion having an inner diameter D2, and a portion having an inner diameter D3, and D1 and D2 are substantially equal or have a relationship of D1> D2.
D2 and D3 have a relationship of D2> D3,
The portion of the inner diameter D1 includes an inlet for receiving the first fluid in a tangential direction when viewed from a circular cross section perpendicular to the central axis of the flow path, and the inflowing first fluid causes a vortex around the nozzle. An eddy current forming portion to be formed, and an opening for pushing the first fluid to the portion of the inner diameter D2.
A fluid mixing device having an accelerating portion in which the inner diameter decreases linearly between the inner diameter D2 and the inner diameter D3;
A spiral flow of the first fluid is formed around the nozzle from the opening of the accelerating unit to the discharge port of the nozzle disposed therein, thereby generating abnormal noise due to vibration of the nozzle. How to prevent.

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