JPH04118154U - fountain nozzle - Google Patents

Abstract

(57) [Summary] [Objective] To provide a fountain nozzle that forms a beautiful bell-shaped fountain film with a uniform thickness, no disturbance, and a large bulge with good shape stability. [Structure] In a fountain nozzle in which a circular member 7 for adjusting a fountain film having an upwardly expanding tapered lower surface 7a is arranged concentrically at the upper end of a cylindrical nozzle body 1 with a gap 9, the circular member for adjusting a fountain film The diameter of the nozzle 7 is set to be slightly larger than the outer diameter of the nozzle body 1, and the taper angle θ of the tapered lower surface 7a with respect to the horizontal plane is set in the range of 10° to 20°.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention is a fountain nozzle (hereinafter referred to as a bell-shaped fountain nozzle) in which a substantially bell-shaped fountain film is formed. (referred to as "L").

0002

[Conventional technology]

For example, a conventional bell-shaped fountain nozzle with a structure as shown in Fig. 5 is known. It is. This bell-shaped fountain nozzle has a tapered lower surface 101a that widens upward. A gap 103 is formed at the upper end of the cylindrical nozzle body 102 using the circular member 101 for adjusting the fountain film. The expansion chamber 104 is provided in the lower part of the nozzle body 102. It has a structure with a built-in spherical plate 105, and water is sent from the water inlet 106 at the lower end. When water is pumped, it collides with the spherical plate 104 as shown by the arrow and fills the gap around it. The flow and pulsation of water caused by the water pump are suppressed, and the water flows from the gap 103 at the upper end of the nozzle to the surrounding area. The water jets out to form a substantially bell-shaped fountain film.

0003

[Problem that the idea aims to solve]

However, in the conventional bell-shaped fountain nozzle, the circular member 101 for adjusting the fountain film is The diameter is set to be the same as the outer diameter of the nozzle body 102, and the tapered lower surface 101a is Since the taper angle θ with respect to the horizontal plane was set to about 30°, the thickness of the fountain film was The further away from the gap 103 at the top of the fountain, the larger the turbulence occurs, causing the bell of the fountain membrane to become larger. There is a problem that the shape is not stable and a large bell-shaped fountain film is not formed. Ta.

0004

[Means to solve the problem]

This invention was made with the main purpose of solving the above problem, and was A circular member for adjusting the fountain membrane with a tapered lower surface is attached to the upper end of the cylindrical nozzle body. In a fountain nozzle arranged concentrically with a gap, the diameter of the above circular member is the nozzle. set slightly larger than the outer diameter of the main body, and also It is characterized in that the taper angle is set in the range of 10° to 20°.

[0005]

[Effect]

As in the fountain nozzle of the present invention, the diameter of the circular member for adjusting the fountain film is set to the outer diameter of the nozzle body. If the size is set slightly larger, the water jets out from the gap between the circular member and the top of the nozzle body. is designed along the periphery of the tapered lower surface of the circular member that protrudes from the nozzle body. The bell-shaped The thickness of the fountain membrane is almost uniform and there is no disturbance, and the bell shape of the fountain membrane is maintained. It becomes stable, and the taper angle of the tapered lower surface of the circular member is 10° ~ Because it is set within a 20° range, a beautiful and spacious bell-shaped fountain membrane is created. It is formed.

[0006]

【Example】

Hereinafter, embodiments of the fountain nozzle of the present invention will be described in detail with reference to the drawings.

[0007] FIG. 1 is a sectional view of a fountain nozzle according to an embodiment of the present invention, and FIG. 3 is a perspective view of the pulsation prevention member incorporated in the fountain nozzle, and FIG. 4 is the same fountain FIG. 3 is an enlarged partial cross-sectional view of the nozzle.

[0008] In the figure, 1 is a cylindrical nozzle body, and at the lower end of this nozzle body 1, The connecting tube 2 to the water pump is welded. This connecting tube 2 also has an inner diameter. A small throttle plug 3 is welded.

[0009] Inside the nozzle body 1, a cross-shaped rectifier plate 4 and a pulsation prevention member 5 are arranged vertically at intervals. They are opened and inserted, and both are welded to the inner surface of the nozzle body 1. The current plate 4 is It regulates the flow of water inside the nozzle body 1, and has a shaft 6 at its center. An upper end threaded portion 6a of the mandrel 6 protrudes from the upper end of the nozzle body 1. On the other hand, pulsation As shown in FIGS. 1 and 3, the prevention member 5 is a short tapered tube with a reduced diameter at the bottom. The body 5a and the spherical plate 5b below it are connected and integrated by four surrounding fixed support plates 5c. The pulsating water sent from the water pump to the nozzle body 1 flows through the spherical plate. 5b and flows between the fixed support plate 5c from the gap between the spherical plate 5b and the nozzle body 1. , the short cylinder 5a collides with the tapered part of the short cylinder 5a again, and the short cylinder 5 It is designed to pass through a.

0010 The upper threaded portion 6a of the mandrel 6 that protrudes from the nozzle body 1 has an upwardly widening tape. A circular member 7 for adjusting a fountain membrane having a lower surface 7a with a pad and a fixing cap nut 8 are screwed together. The size of the gap 9 between the circular member 7 and the upper end of the nozzle body 1 can be determined by rotating the circular member 7. By changing the , the thickness of the fountain membrane can be adjusted freely.

[0011] This fountain membrane adjustment circular member 7 is a disc-shaped member with a screw hole formed in the center. As shown in FIG. The diameter is set to be slightly larger than the outer diameter of the nozzle body 1 so that it protrudes. this It is desirable that the protrusion dimension t is about 1 to 2 mm, so that the peripheral edge of the circular member 7 If it protrudes to this extent, the circular member 7 and the upper end of the nozzle body 1 will Water jetting from the gap 9 is guided along the lower surface of the peripheral edge of the circular member 7, and the jet The direction of the bell-shaped fountain membrane is determined by the angle of inclination that is approximately equal to the taper angle θ of the lower surface. The thickness becomes almost uniform and no disturbance occurs, and the bell shape of the fountain membrane becomes stable. It becomes what it is.

0012 The taper angle θ (taper angle with respect to the horizontal plane) of the lower surface of the circular member 7 is 10° to 20° It is necessary to set the range within this range, and even if it is larger or smaller than this range, the spread Experiments have shown that it is difficult to form large bell-shaped fountain membranes. Especially the taper angle θ When the angle is set to 15°, a beautiful bell-shaped fountain membrane with the widest expansion is formed. It turns out it can be done. Although the reason is not certain, the inner space of the bell-shaped fountain membrane is generally Because the pressure is reduced, the bell-shaped fountain membrane is compressed from the surrounding area due to the pressure difference with the outside space. If the taper angle θ is set to 15° as described above, this It is presumed that this is because a bell shape is formed that is least susceptible to compression.

[0013] In the bell-shaped fountain nozzle configured as above, the connection tube 2 at the lower end is connected to the water pump. It is connected to the mouth and incorporated into the fountain device. Then, when water is sent from the water pump, the The flow is throttled by the pulsation stopper 3 and flows into the nozzle body 1, where it flows into the spherical plate 5b of the pulsation prevention member 5. The collision occurs and flows between the blades 5c from the gap between the spherical plate 5b and the nozzle body 1, and the short cylindrical body It collides with the tapered part of 5a again and passes through the short cylinder 5a with pulsation sufficiently suppressed. do. The passed water further passes between the rectifying plates 4 and is rectified, and is then rectified by the circular part for adjusting the fountain membrane. A bell-shaped fountain is formed by jetting the material 7 and the upper end of the nozzle body 1 from the gap 9 to the surrounding area with a constant pressure. A film is formed. If the pressure of the water jetting from the gap 9 is constant in this way, the bell The shape of the shaped fountain membrane is stabilized, and there is no need to worry about the fountain membrane breaking halfway. Moreover, this In the fountain nozzle, the diameter of the circular member 7 for adjusting the fountain film is slightly smaller than the outer diameter of the nozzle body 1. Since the gap is set large, the water jetting from the gap 9 will not protrude from the circular member 7. The jet direction is approximately equal to the taper angle θ of the lower surface. Determined by the angle of inclination. As a result, the thickness of the bell-shaped fountain film becomes almost uniform, causing turbulence. The bell shape of the fountain membrane becomes even more stable. On top of that Since the taper angle θ is set in the range of 10° to 20°, the fountain film is not compressed. A beautiful bell-shaped fountain membrane that swells out larger than before is formed. Ru.

[0014]

[Effect of the idea]

As is clear from the above explanation, the fountain nozzle of the present invention has a constant thickness of the fountain film. A beautiful bell-shaped fountain membrane with good shape stability that swells out larger than before without any turbulence. It has a remarkable effect of being able to form.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a fountain nozzle according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line II in FIG. 1;

FIG. 3 is a perspective view of a pulsation prevention member incorporated into the fountain nozzle.

FIG. 4 is an enlarged partial sectional view of the fountain nozzle.

FIG. 5 is a cross-sectional view of a conventional fountain nozzle.

[Explanation of symbols]

1 Nozzle body 5 Pulsation prevention member 7 Circular member for fountain membrane adjustment 7a Tapered bottom surface 9 Gap

Claims (1)

[Scope of utility model registration request] [Claim 1] A fountain nozzle in which a circular member for adjusting a fountain film having a tapered lower surface that widens upward is disposed concentrically at the upper end of a cylindrical nozzle body with a gap, the diameter of the circular member being equal to the diameter of the nozzle body. Set it slightly larger than the outer diameter, and set the taper angle of the tapered bottom surface to the horizontal plane to 1.
A fountain nozzle characterized in that the fountain nozzle is set in a range of 0° to 20°.