JP2535203Y2 - Liquid injection nozzle - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid ejecting nozzle for ejecting a liquid in a state where an ejection port becomes a flat liquid curtain.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG.
The liquid passage 7 has a circular jet port 6 as shown in FIG. 6 and a guide surface 9 located in front of the jet port 6 so as to act on the jet liquid from the jet port 6. In some cases, a flat liquid curtain is formed, and the liquid can be ejected in a state where the ejection angle Z is relatively large. Also, as shown in FIGS. 8 and 9, by forming the ejection port 6 in the slit port and directly ejecting the liquid to the liquid supply point, the ejection liquid becomes a flat liquid curtain, and FIG. As shown in FIG. 10, there was a type that could be injected in a state of being distributed at a relatively uniform flow rate over almost the entire injection region.

[0003]

Among the conventional injection nozzles, in the case of a circular nozzle with a guide surface, as shown in FIG. 7, the injection liquid amount at the center of the injection region and the injection liquid amount at both ends are as shown in FIG. The difference was remarkably large. In the case of the slit nozzle, the ejection angle is relatively small, and foreign matter mixed in the liquid tends to be easily clogged in the ejection port. SUMMARY OF THE INVENTION It is an object of the present invention to provide a liquid ejecting nozzle which can eject with a relatively wide ejection angle with a uniform flow rate distribution and is less likely to cause foreign matter clogging.

[0004]

In order to achieve the object, in the liquid jet nozzle according to the present invention, the jet port of the liquid passage of the nozzle body is formed in an elliptical shape, and the jet liquid from the jet port is formed. A guide surface that guides the liquid ejected from the jet port in a state where the liquid jet is jetted to the flat liquid curtain in a direction substantially intersecting with the major axis direction of the jet port and intersecting with the central axis of the liquid passage is provided in front of the jet port. And provided on the nozzle body. The operation and effect are as follows.

[0005]

When the guide surface acts on the ejected liquid from the elliptical ejection port, the ejection liquid is distributed in the ejection area at a more uniform flow rate than the conventional circular nozzle ejected from the circular ejection port, and the slit type is provided. The liquid is ejected at a wider ejection angle than the conventional slit opening nozzle which directly ejects the liquid from the ejection port to the liquid supply portion, and facilitates the extrusion of the contaminant foreign matter.

[0006]

[Effect of the invention] Because of the elliptical shape of the injection port and the guide surface,
In spite of the need for a small amount of liquid, the liquid is sprayed in a uniform amount distribution at a relatively wide spray angle so that the liquid can be uniformly supplied over a wide range, and the processing such as defoaming by liquid supply can be performed at a relatively low cost. In addition, even if foreign matter is mixed in the liquid, the liquid is hardly clogged and the liquid can be supplied safely and efficiently.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, a nozzle orifice 3 provided with a restrictor 2 is mounted in a mounting hole of a nozzle body 1, and an adapter 5 provided with a rectifier 4 is screwed to one end of the nozzle body 1. Thus, the nozzle body 1 is provided with a liquid passage 7 having a jet port 6 and the like facing the one end side opening of the mounting hole of the nozzle body 1, and the guide body 8 formed and provided as an integral part of the nozzle body 1 is provided. A guide surface 9 acting on the liquid ejected from the ejection port 6 is formed to constitute a side spray type liquid ejection nozzle. That is,
By supplying a liquid such as water at a predetermined pressure from a receiving port of the liquid passage 7 where the rectifier 4 is located, the supply liquid is ejected as a fan-shaped flat liquid curtain, which is configured in detail as follows. .

The jet port 6 has an inner surface in the vicinity of the outlet of the liquid passage 7 formed in a shell shape as shown in FIG. 1 and has a tip end surface of the nozzle orifice 3 in a direction perpendicular to the central axis L of the liquid passage 7 as shown in FIG.
And by forming a kerf 10 as shown in FIG. In other words, by adopting this ejection port creation method, the ejection port 6 is formed into an elliptical shape, and the major diameter A and the minor diameter of the elliptical ejection port 6 are determined by setting the shape of the shell and the shape and depth of the kerf 10. The ratio of B is set to A: B ≒ 7: 8.

The guide surface 9 is arranged in front of the jet port 6 so as to contact the liquid jetted from the jet port 6 in the direction along the central axis L of the liquid passage 7 and is shown in FIG. As described above, since the flat guide surface portion 9a intersects with the center axis L at an intersection angle X ≒ 75 ° and the curved guide surface portion 9b connected to the flat guide surface portion 9a, the liquid ejected from the jet port 6 is formed. Is guided from the ejection port 6 in a direction different from the ejection direction, and intersects the central axis L,
Further, it is configured so as to form a fan-shaped flat liquid curtain extending substantially in the direction of the major axis A of the ejection port 6.

The rectifier 4 is configured to rectify the supplied liquid so that a spiral flow is unlikely to occur in the liquid passage 7. The restrictor 2 is configured to form a throttle portion at a position between the rectifier 4 and the jet port 6 in the liquid passage 7. The nozzle orifice 3 is provided with a passage diameter changing portion that forms a throttle portion 11 at a position between the restrictor 2 and the ejection port 6 of the liquid passage 7, and the restrictor 2 and the throttle portion 11 are provided at the supply destination of the jet liquid. Is configured so as to throttle the flowing liquid so that the flow rate distribution of the liquid is uniform. That is, as shown in FIGS. 5 and 6, in a nozzle in which the ejection port 6 is circular and only the guide surface 9 and the throttle portion 11 act, the fluid is ejected in a flow rate distribution as shown in FIG. By the action of the rectifier 4, the restrictor 2, the restricting portion 11, the elliptical shape of the jet port 6, and the guide surface 9, the fluid is jetted with a flow rate distribution as shown in FIG. FIG.
The flow rate distribution shown in FIG. 7 and FIG.
Are based on the experimental conditions shown in FIG.

[0011]

[Table 1]

Rectifier 4, restrictor 2, and throttle unit 1
A part or all of 1 may be omitted. Note that, in the claims of the utility model registration, reference numerals are written for convenience of comparison with the drawings, but the present invention is not limited to the configuration of the attached drawings by the entry.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a liquid jet nozzle.

FIG. 2 is a front view of a spout.

FIG. 3 is a rear view of the liquid jet nozzle.

FIG. 4 is an explanatory view of an experimental result of the nozzle of the present invention.

FIG. 5 is a sectional view of a conventional circular nozzle.

FIG. 6 is a front view of a conventional circular nozzle.

FIG. 7 is an explanatory diagram of an experimental result of a conventional circular nozzle.

FIG. 8 is a sectional view of a conventional slit opening nozzle.

FIG. 9 is an explanatory view of an ejection port of a conventional slit opening nozzle.

FIG. 10 is an explanatory diagram of an experimental result of a conventional slit nozzle.

[Explanation of symbols]

 1 Nozzle body 6 Spout port 7 Liquid passage 9 Guide surface A Long diameter

Claims (1)

(57) [Scope of request for utility model registration] 1. A nozzle (6) of a liquid passage (7) of a nozzle body (1) is formed in an elliptical shape, and said nozzle (6)
From the liquid passage (7) in a state of intersecting with the central axis (L) of the liquid passage (7) and being jetted to the flat liquid curtain in a direction substantially along the major axis (A) direction of the jet port (6). A liquid jet nozzle provided in the nozzle body (1) with a guide surface (9) for guiding the jet liquid from the jet port (6) disposed in front of the jet port (6).