JPS6037252A - Spray nozzle - Google Patents

Abstract

1. Spray nozzle with hemispherical head comprising two slots (14) which are symmetrically arranged with respect to a plane (X-X) containing the axis (Y-Y) of the nozzle and the median planes of which are sloping with respect to the said symmetry plane, characterized by the fact that both slots (14) are arranged so as to produce a common stream, by the fact that the angle (alpha) formed by the median plane of each slot with the symmetry plane (X-X) lies between 5 degrees and 40 degrees, and by the fact that both ends of the slots (14) are located at the bottom level of the hemispherical head (12) of the nozzle and spaced from the said symmetry plane.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention is directed to subdividing a liquid into small droplets within the body of a spraying device and suspending the liquid in a stream of air so as to form a wide flat jet. A spray device of the type that sprays a mixture of and at high velocity through an elongated opening in a nozzle with a hemispherical head. The device is used in particular for cooling continuous castings.

[Conventional technology and problems]

In known devices of this type, the nozzle has a single gap forming a relatively thin jet. By increasing the gap width it is possible to increase the thickness of the jet, but in this case the jet will not be uniform.

For example, when cooling blooms, especially those produced by continuous casting machines, a relatively thick and uniform jet is desired over the entire cross-section of the bloom. It is an object of the present invention to provide a nozzle with which such results can be obtained.

[Means for Solving the Problems] A spray nozzle that achieves the above object of the present invention has two gaps located symmetrically with respect to a plane containing the axis of the nozzle, and the center plane of the gaps is inclined at an angle of 5° to 40° with respect to the plane of symmetry, the two ends of the gap being located approximately at the same height as the base of the hemispherical head of the nozzle and at a distance from the plane of symmetry. It is characterized by

In the nozzle of the present invention, the shape and arrangement of the gap can be changed depending on the desired effect.

〔Example〕

Other features and advantages of the invention will be described in detail below with reference to the accompanying drawings, which do not otherwise limit its scope.

The illustrated nozzle is constituted by a glove finger-shaped member 10 forming a semi-circular head 12 with a 21 [til gap 14 machined into it. The base of the member 10 is provided with an annular shoulder 16 which allows for fixation by means of a nut to the threaded end of the spray nozzle body.

The pawls 18 allow accurate positioning of the nozzle on the spray device body.

The gap 14 is symmetrical with respect to a plane X-X containing the nozzle axis Y-Y. The shape of the gap is semicircular, with the distal end located approximately at the same height as the base (plane Z-Z) of the semicircular navel 12 and away from the plane of symmetry X-X.

In the case of the embodiment of FIGS. 1 and 2, the edges of the gap are parallel and the central plane of the gap is inclined with respect to the plane of symmetry by an angle α equal to approximately 20°. When projected perpendicularly to the central plane of the gap and the plane of the drawing (arrow F), the shape of the gap is approximately trapezoidal as shown in FIG. The gap is formed by milling with a saw milling cutter or a three-way milling cutter on a universal milling machine with a tiltable head.

In the embodiment of FIG. 4, the width of the gap, which is located similarly to the nozzle of FIGS. 1 and 2, decreases from the ends toward the center. When projected perpendicularly to the central plane of the gap and the plane of the drawing (arrow F), the gap has the shape shown in FIG.
In this embodiment, the longitudinal edges have a curved shape, for example a circular arc. The machining of the gap consists of two phases. First, a parallel flat edged gap is formed by milling. The lip is then shaped into a curved shape by combining a reciprocating cutting motion with a forward circular motion.

As a different type, for example, as shown in FIG. 5, the longitudinal edge of the gap can be divided into two parts (Fig. 6) or three parts (Fig. 7).
Alternatively, it may be formed by a refraction line made up of more parts.

In the embodiment of FIG. 6, the gap is effected by milling with a saw milling cutter in two steps, rotating the face of the milling cutter between the two steps. In the case of the seventh nozzle, since the width of the zone centrally located from the end of the gap is constant, the third nozzle is
A journey is necessary.

The center plane of the gap is at an angle of 5° to 40° with respect to the symmetry plane of the nozzle.
It can be changed within the range of .

Other types of gaps are possible without departing from the scope of the invention.

[Brief explanation of drawings]

1 is an elevational view of a nozzle according to the invention, FIG. 2 is an end view of the nozzle, and FIG. 3 is a view taken from arrow F in FIG.
4 is an elevational view showing another type of nozzle of the present invention, FIG. 5 is a view taken from arrow F in FIG. 4, and FIGS. 6 and 7 are views showing the shape of the nozzle gap. FIG. 5 is a drawing similar to FIG. 5, showing an alternative gap for the nozzle of the invention; 12...Semicircular head, 14...Gap, α...Inclination angle of gap center plane, Y-Y...
...Nozzle axis, X-X...A surface that includes the axis X-X. Patent Applicant Huybus Caille Babcock FIG, 4
FIG, 5 FIG, 6 FIG, 7 Procedural amendment (flag) August 20, 1980 Manabu Shiga, Commissioner of the Patent Office 1, Indication of the case 1982 Patent Application No. 094757
No. 2, Name of the invention + *a nozzle 3, Relationship with the case of the person making the amendment Patent applicant France 1m 75383 Paris Sedecex 08 Address Leigh Montlivet T Name Fitz Caille Pub s7/ = Yen - Series 14, Agent Person 5, date of amendment order: T month 31, 1980, 8;
Details of the amendment As shown in the attached sheet −

Claims (3)

[Claims] (1) A spray nozzle having a hemispherical head (12) that produces a wide flat jet, and a plane (X-X) formed in the hemispherical head (12) and including the axis (Y-Y) of the nozzle.
211Iil gap (14
), and the central plane of the gap is 5° to the plane of symmetry.
inclined at an angle (α) of 40°, characterized in that the two ends of the gap are located approximately at the same height as the base of the hemispherical head (12) of the nozzle and away from the plane of symmetry. The spray nozzle. (2) The spray nozzle according to claim 1, wherein the width of the gap is constant over the entire length. (3) The spray nozzle according to claim 1, wherein the width of the gap decreases from the end portion to the center portion or its vicinity.