JP3036668B2 - Cylinder nozzle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention increases the outer diameter of a water column by ejecting annular water from an annular passage formed between an inner cylinder and an outer cylinder, compared to a solid fountain having the same flow rate. Further, the present invention relates to a cylinder nozzle suitable for performing a fountain having a large flow rate.

[0002]

2. Description of the Related Art Conventionally, a cylinder nozzle has been known as a nozzle for performing a fountain with a large flow rate by making the outer diameter of a water column larger than that of a solid fountain having the same flow rate. The cylinder nozzle, as shown in FIGS. 4 and 5, tip half
A bottomed inner cylinder 1 closed by a spherical bottom member 1A and the inner cylinder 1
The outer tube 2 concentrically inserted into the outer tube 2 is integrally connected by radial ribs 3 to form an annular passage 4 between the inner tube 1 and the outer tube 2. Therefore, the high-pressure water W introduced from the inlet 4A of the annular passage 4 is formed between the inner and outer cylinders 1 and 2.
Injected as annular water RW from annular outlet 4B formed
Re that. This makes it possible to execute a fountain having a larger outer diameter of the water column than the solid fountain having the same flow rate and a large flow rate.

Generally, when a swirling flow is ejected from a fountain nozzle, the fountain spreads in the radial direction immediately after the ejection and disturbs the appearance of the fountain, and the fountain height is suppressed by the radial extension, thereby lowering the fountain efficiency. But,
In this type of cylinder nozzle, the rectifying action of a radial rib 3 integrally connecting the inner cylinder 1 and the outer cylinder 2 causes the inlet 4
The high-pressure water W introduced from A can be prevented from turning in the annular passage 4. Therefore, the above-described inconvenience caused by the swirling flow spouting from the outlet 4B can be avoided.

However, the high-pressure water W introduced into the annular passage 4 from the inlet 4A has an annular cross-sectional shape near the inlet 4A of the annular passage 4 as shown in FIG. By passing through the installation area of the rib 3,
Since water is divided in the axial direction corresponding to the number of the ribs 3 and the wall thickness t, as shown in FIG. It has a cross-sectional shape. Rib 3
Further downstream, the cross-sectional area having the missing circle portions 5, 5,... In the immediately downstream region X is exhibited, despite the passage cross-sectional area being increased by the number of ribs 3 and the thickness t. Downstream area X
, And changes into an annular cross-sectional shape as shown in FIG. 6 and is ejected from the outlet 4B. As described above, when the cross-sectional shape of the water flow changes while the cross-sectional area of the passage is enlarged, the water flow is disturbed, and the outlet 4B remains disturbed.
When it is ejected from the fountain, it immediately expands in the radial direction immediately after the ejection, and the fountain appearance is disturbed, and the fountain height is suppressed and the fountain efficiency is reduced. In particular, if the flow velocity in the annular passage 4 is increased in order to perform a high-head fountain, the water will be ejected from the outlet 4B with the cross-sectional shape having the missing circles 5, 5,... Shown in FIG. Immediately after the eruption, a large radial spread occurs, disturbing the fountain appearance, and the height of the fountain is suppressed, making it difficult to execute a high-head fountain.

That is, in the conventional cylinder nozzle, the high-pressure water W introduced from the inlet 4A is suppressed from swirling in the annular passage 4 by the rectifying action of the radial rib 3, and the swirling flow is ejected from the outlet 4B. Although it has a function of avoiding the inconvenience caused by this, water having a cross-sectional shape having broken circles 5, 5,. There is a drawback that the fountain efficiency is reduced by being suppressed, and it is difficult to execute a high-lift fountain.

[0006]

A problem to be solved is that water having a cross-sectional shape having a broken circle flows due to the dividing action of the radial ribs, disturbing the fountain state, and the fountain height is suppressed. This is because it reduces the fountain efficiency and makes it difficult to execute a high head fountain.

[0007]

According to the present invention, the tip portion is a hemisphere.
A bottomed inner cylinder closed by a bottom member of a shape and a concentrically inserted into the inner cylinder.
The passed outer cylinder is integrally joined by radial ribs, and the entrance between the inner cylinder and the outer cylinder is on the downstream side of the tip bottom member of the inner cylinder.
In a cylinder nozzle that forms an annular passage that is located and that ejects high-pressure water from this annular passage, the annular passage has a uniform upstream section having a cross-sectional shape in which the radial ribs are arranged, and between the inner and outer cylinders. And a downstream portion having a cross-sectional shape that gradually decreases in diameter toward an outlet for injecting annular water, characterized in that it has a cross-sectional shape having a missing circular portion due to a radial rib dividing action. Even if water flows, the fountain appearance is not disturbed, and the fountain height is increased to improve fountain efficiency and achieve the goal of enabling high-lift fountains.

[0008]

According to the present invention, the high-pressure water introduced into the annular passage passes through the installation area of the radial ribs, whereby water is divided in the axial direction corresponding to the number and thickness of the ribs. , Has a cross-sectional shape with a missing circle corresponding to the number and thickness of ribs,
In the region immediately downstream of the rib, it has a cross-sectional shape with a missing circle,
Since changes to the annular cross-sectional shape by passing through the immediately downstream region, although turbulence in the water flow caused by the throttling effect as it passes through the downstream portion having a cross-sectional shape gradually reduced in diameter toward the outlet, the aforementioned The turbulence can be ejected in a rectified state by eliminating the disturbance.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a longitudinal sectional view showing an embodiment of the present invention, and FIG.
It is an expanded sectional view which follows the AA line. In addition, FIG.
The same or corresponding parts as in the conventional example of FIG . 1 and 2, a cylinder nozzle includes a metal inner cylinder 1 having a bottom, a metal outer cylinder 2 having both ends opened in the axial direction through which the inner cylinder 1 is concentrically inserted, an inner cylinder 1 and an outer cylinder 2. And the inlet 4B between the two 1 and 2
Is an annular passage 4 located downstream of the distal end of the inner cylinder 1.
Are provided.

The inner cylinder 1 is vertically long and has a lower end (upstream end).
Part) is closed by a hemispherical bottom member 1A,
(A downstream end) is projected slightly upward from the upper end surface of the outer cylinder 2. The outer cylinder 2 includes a lower body 2A having a uniform inner diameter, and an upper body 2B connected to the lower body 2A and having an inner diameter gradually reduced toward an upper end. Six metal plate members 3A interposed between the outer circumferences of the cylinders 1,
Radial ribs 3 made of 3A ...... is an inner cylinder 1 and the outer cylinder 2 attached together. That is, the inner end faces of the six metal plate members 3A, 3A arranged at equal intervals in the circumferential direction are attached to the outer periphery of the inner cylinder 1 by welding, and the outer end faces are attached to the inner periphery of the outer cylinder 2 by welding. Then, the inner cylinder 1 and the outer cylinder 2 are integrally joined, and thereby, the upstream portion 4C having a uniform cross section in which the radial ribs 3 are arranged is formed between the inner cylinder 1 and the outer cylinder 2.
An annular passage 4 that includes a downstream portion 4D that is having a cross-sectional shape gradually reduced in diameter toward the outlet 4B for injecting an annular water
Is formed. In the figure, reference numeral 6 denotes a high-pressure water supply pipe for fountain, which is connected to a high-pressure water supply source (pump) 7.

With such a configuration, the high-pressure water supply pipe 6
High pressure water W introduced from the annular passageway 4 of an inlet 4A through the Ru is injected as an annular water RW from the outlet 4B. This makes it possible to execute a fountain having a larger outer diameter of the water column than the solid fountain having the same flow rate and a large flow rate.

On the other hand, the rectifying action of the radial ribs 3 integrally connecting the inner cylinder 1 and the outer cylinder 2 can suppress the high-pressure water W from turning in the annular passage 4. for that reason,
Inconvenience caused by the swirling flow spouting from the outlet 4B can be avoided. That is, the annular water RW spreads in the radial direction immediately after the jetting, and the fountain appearance is disturbed, and the height of the fountain is suppressed by the radial expansion, so that the disadvantage of reducing the fountain efficiency can be avoided.

On the other hand, the high-pressure water W introduced into the annular passage 4
By passing through the installation area of the radial ribs 3, constitute the ribs 3 are six metal plate 3A, 3A ......
Is divided in the axial direction by the metal plate material 3A, 3A ...
Becomes cross-sectional shape with a segmental portion 5 corresponding to the number and thickness t (see FIG. 3), it exhibits a cross-sectional shape with a segmental portion 5, immediately downstream region X of the rib 3, immediately downstream region X , The water flow changes to an annular cross-sectional shape as shown in FIG. 6 and the water flow is disturbed.
The throttling effect as it passes through the downstream portion 4D having a sectional shape that is condensation diameter, annular water R commutation state to eliminate the aforementioned disturbances
W can be spouted. Therefore, the fountain efficiency is improved by eliminating the disturbance of the fountain appearance and increasing the fountain height, and a high-head fountain can be executed.

In the above embodiment, six metal plates 3A,
Although the radial ribs 3 are described by 3A..., The number of metal plate members 3A may be three or more.

[0015]

As described above, according to the present invention, the high-pressure water introduced into the annular passage passes through the area where the radial ribs are provided, so that the high-pressure water corresponds to the number and thickness of the ribs. Is cut off in the axial direction, becomes a cross-sectional shape with a missing circle corresponding to the number and thickness of the ribs, and presents a cross-sectional shape with a missing circle in the area immediately downstream of the rib, passing through the area immediately downstream although turbulence in the water flow caused because changes annular cross-sectional shape by, the throttling effect as it passes through the downstream portion having a cross-sectional shape gradually reduced in diameter toward the outlet, commutation state to eliminate the aforementioned disturbances Can be ejected as annular water . Therefore, the fountain efficiency is improved by eliminating the disturbance of the fountain appearance and increasing the fountain height, and a high-head fountain can be executed.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of the present invention.

FIG. 2 is an enlarged sectional view taken along the line AA of FIG.

FIG. 3 is an enlarged view showing a cross-sectional shape of flowing water immediately after passing through a setting area of a radial rib.

FIG. 4 is a longitudinal sectional view of a conventional example.

FIG. 5 is an enlarged sectional view taken along the line BB of FIG. 4;

FIG. 6 is an enlarged view showing a cross-sectional shape of flowing water immediately after being introduced into an annular passage.

FIG. 7 is an enlarged view showing a cross-sectional shape of flowing water immediately after passing through an installation area of a radial rib.

[Explanation of symbols]

Reference Signs List 1 inner cylinder 1A hemispherical bottom member 2 outer cylinder 3 radial rib 4 annular passage 4B annular passage outlet 4C upstream of annular passage 4D downstream of annular passage W high-pressure water

Claims (1)

(57) [Claims] 1. A method according to claim 1, wherein the distal end is closed by a hemispherical bottom member.
An inner cylinder at the bottom and an outer cylinder concentrically inserted through the inner cylinder are integrally connected by radial ribs, and an inlet is provided between the inner cylinder and the outer cylinder.
Forming a circular passage located downstream of the tip bottom member of the cylinder nozzle for ejecting high-pressure water from the circular passage, wherein the circular passage has a uniform cross-sectional shape in which the radial ribs are arranged. Between the upstream and the inner and outer cylinders
A downstream portion having a cross-sectional shape whose diameter gradually decreases toward an outlet for injecting annular water .