JPS5923868B2 - Swirling flow generation nozzle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a swirling flow generating device that suctions fluid by utilizing an ejector effect produced by ejecting fluid, and mixes and ejects ejected fluid and suction fluid.

Conventionally, in spray potash for painting, nozzles for dispersing chemical liquids, gun burners for burning heavy oil, etc., it has been necessary to atomize paints, chemical liquids, heavy oil, etc. as much as possible and mix them evenly with air.

However, the above-mentioned conventional apparatus does not perform mixing using a single nozzle, and the apparatus itself is complicated and large in size.

Furthermore, since the conventional device described above jets out both liquid and air, the device becomes larger accordingly.

On the other hand, there is also a known device that uses the ejector effect of the ejected air to mix the suction fluid and the ejected air.

(For example, Japanese Patent Publication No. 49-24008, Utility Model Publication No. 51
(Japanese Patent No. 33376) However, the device described in the above publication cannot perform suction for the following reasons.

That is, since the ejected air is concentrated at one point at the tip of the suction port, a positive pressure is generated in that part, and the negative pressure necessary for suction is not generated.

Further, in the case described in the above publication, the ejected air flow does not become a swirling flow, and even if mixing with the suction fluid occurs, the mixing state is insufficient.

SUMMARY OF THE INVENTION An object of the present invention is to improve the above-mentioned drawbacks and to provide a device in which other fluids are suctioned and mixed using only the energy of the ejected fluid, and the mixed ejected fluid becomes at least a swirling flow to improve the mixing state. It is something. This will be explained below using figures.

FIG. 1 is a sectional view of a nozzle showing one embodiment of the present invention.

The nozzle body 1 has a conical shape at one end, and a streamlined rectifying section 3 at the other end.

A fluid ejection groove 2 is formed in the conical portion. Although it is desirable that the ejection groove 2 be formed in a spiral shape as described below, a straight groove is not excluded. A plurality of supporting parts 4 are formed protruding from the outer periphery of the nozzle body 1, and the outer periphery of the supporting parts 4 is threaded. The casing 5 is placed over the nozzle body 1, and the nozzle body 1 is fixed to the casing 5 by screws that engage with the screws of the support portion 4. A cap 6 is placed over the conical portion of the nozzle body 1, and the ejection groove 2 and the cap 6 form a fluid ejection passage.

The cap 6 is fixed to the nozzle body 1 by a holding fitting 7 that is screwed into the casing 5. A suction passage 8 is formed in the center of the nozzle body 1, and the conical portion is a truncated cone, and a suction opening 8 is formed in the end face thereof.

The suction passage 8 is continuous with the suction opening 8 . Further, a passage 9 is provided between the nozzle body 1, the casing 5, and the holding metal fitting r.
is provided, and the ejected fluid flows within the passage 9. A pipe 10 is screwed so as to communicate with the suction passage 8 of the nozzle body 1, and the inflow passage 11 communicates with the suction passage 8. The operation of the present invention structured as described above will be explained below.

The ejected fluid is introduced from one end of the casing 5 as indicated by arrow 12.

Then, it gently passes through the rectifier 3 as shown by the arrow 13 and passes through the passage 9 as shown by the arrow 14. After that, it reaches the inside of the jetting groove 2 and is jetted out from the jetting opening 2 at the end of the jetting groove as shown in v. The direction of the jet flow v will be described later. Fluid is suctioned from the suction opening 8 by the negative pressure generated by the jet flow v.

That is, when a negative pressure is generated, fluid flows in the pipe 10 as shown by the arrow 15 in the figure, flows through the suction passage 8 as shown by the arrow 16 in the figure, and is sucked out from the suction opening 8.

In order for the above-mentioned effect to occur, a negative pressure must be created in the vicinity of the suction opening 8.

In addition, in order for the ejected fluid and the suction fluid to mix well, the mixed flow of the ejected fluid and the suction fluid must be a swirling flow (G). The shape of the ejection groove 2 that achieves the above conditions is shown in FIG. 2.

Referring to A and Mouth in FIG. 2, a spiral ejection groove 2 is formed in the conical portion of the nozzle body 1.

An imaginary cylinder 17 is drawn on the extension of the suction opening 8. Letting U be the axis of the jet flow from the jet opening 2, U touches the virtual cylinder 17 at a point V. With the above configuration, negative pressure is generated by the jet flow v, and the suction opening 8,
Fluid is aspirated from the Further, after the jet flow v mixes with the suction flow, it becomes a swirl flow to promote mixing. As described above, according to the present invention, one ejected fluid can suck and mix other fluids, so the structure is simple, and the fluids after being sucked and mixed form a swirling flow, so that the mixed state is is good.

In the above description, the ejecting flow and the suction flow can be either liquid or gas, but it is preferable that the combustion burner, chemical spraying, and painting gun suction liquid and eject air. Further, the ejection groove may be formed by drilling a hole in the nozzle shell, and in this case, a cap is not required.

Furthermore, as for the shape of the ejection groove, a straight groove can be adopted in addition to a spiral groove, but since a spiral groove generates swirl in the suction fluid, the effect of promoting mixing is greater. Further, the shape of the cone includes not only a straight cone surface but also a truncated spherical shape having a curved line in the extending direction of the cone.

Furthermore, the present invention does not limit the use of the nozzle to the use described in the specification.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention, FIG. 2A is a front view showing a jetting groove, and the mouth is a sectional view taken along line A-A in FIG.

Claims (1)

[Claims] 1. A fluid suction passage is provided in the center of the nozzle body, and a suction opening serving as the end of the suction passage is provided on the end face of the nozzle body,
A plurality of fluid jet openings are provided on the outer periphery of the fluid suction opening, the fluid is made to flow through jet grooves that are continuous with the jet openings, and a negative pressure is generated by the jet from the jet openings, and the negative pressure is In a nozzle that sucks and mixes fluid from a suction opening, the inclination of the axis of the jet opening, which is the end of the jet groove, is in a direction that touches the outer periphery of an imaginary cylinder that is an extension of the suction opening. A swirling flow generating nozzle characterized by giving a swirling flow to the flow.