JPH0574652U - Fountain device for water curtain - Google Patents

Abstract

(57) [Abstract] [Purpose] A large number of fountain nozzles installed downward at the bottom of the horizontal wall of the horizontal header at a predetermined interval in the longitudinal direction of the pipe, and at the same time, when the fountain starts, the flow rate is almost the same. Water is spouted at, and when the fountain is stopped, it is stopped at once to prevent nasal sagging. [Structure] Each of the fountain nozzles 2 is provided with a water conduit 3 whose upper stage opens near the top of the peripheral wall of the header pipe 1.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a water curtain fountain device for producing a water curtain.

[0002]

[Prior Art]

 At the bottom of the peripheral wall of the horizontal header pipe, downward fountain nozzles that communicate with the inside of the pipe are installed at specified intervals in the longitudinal direction of the header pipe, and a water curtain is produced by the fountain flow jetting downwards from each fountain nozzle all at once. Fountain devices for water curtains have been known for some time.

[0003]

[Problems to be solved by the device]

 In conventional fountains for water curtains, when water is supplied to the header pipe, the water pulsates in the longitudinal direction of the header pipe, and as a result, water does not come out from all the fountain nozzles at the same time when the fountain starts, or When water is stopped, the water from each fountain nozzle is cut unevenly, and due to the displacement of water and air in the header pipe, the water flows out from each fountain nozzle for a while like a raindrop (nasal drip). Phenomenon) continues and there is an unsightly feeling that it does not stop all at once. Also, due to pressure fluctuations in the header pipe, there is a difference in the jet flow rate from each fountain nozzle, and it is not uniform. In addition, the header tube must be equipped with an air bleeding device, which impairs the appearance.

[0004]

[Means for Solving the Problems]

 Therefore, in the present invention, in the water jet fountain device in which downward facing fountain nozzles communicating with the inside of the horizontal header pipe are installed at a predetermined interval in the longitudinal direction of the header pipe, each fountain nozzle is attached to each fountain nozzle. The main feature is that a water pipe with an upper end opened near the top of the peripheral wall of the header pipe is erected.

[0005]

Embodiment In the illustrated embodiment, 1 is a cylindrical header pipe which is horizontally arranged and in which water is supplied by a pump, and a downward fountain nozzle communicating with the pipe is provided at the bottom of the peripheral wall of the pipe 1. A large number of 2 are attached at predetermined intervals in the longitudinal direction of the header tube. The header pipe 1 has an inner diameter of about 150 mm, and the fountain nozzles 2 have an interval of about 30 mm. An upward water conduit 3 is erected on each fountain nozzle 2. The water pipe 3 is oriented in the diameter direction of the header pipe 1, and its upper end reaches near the top of the peripheral wall of the header pipe 1. In this embodiment, in order to increase the opening area of the upper end of the water conduit 3 and to ensure smooth outflow of water, the upper end is an oblique cut 4 at an angle of 45 °. The height of the water conduit 3 is about 145 mm in the case of the above-mentioned header tube having an inner diameter of about 150 mm, but 90% or more of the inner diameter of the header tube is preferable.

Each of the fountain nozzles 2 has a hemispherical concave surface at the lower end in this embodiment, and is fitted to the fixed tube 5 to be screwed into the hole formed in the header tube from the outside and the hemispherical concave surface of the fixed tube 5. It consists of a swing tube 6 having a spherical portion and a cap nut 7 that fits into the swing tube and is screwed into the outer circumference of the fixed tube 5. By slightly loosening the cap nut 7, the direction of the swing tube can be adjusted. It is like this. The lower end of the water guide pipe 3 is inserted and attached to the inner circumference of the fixed pipe 5.

In this way, inside the header pipe, the water guide pipes 3 standing vertically from the respective fountain nozzles 1 are arranged in a line, and the water supplied into the header pipe enters each water guide pipe 3 from the upper end, and from the pipes 3. It flows down the fountain nozzle 2 and ejects downward to create a water curtain.

[0008]

[Effect of the device]

 As is clear from the above, in the fountain device of the present invention, water enters the header pipe from the upper end of the vertical conduit. For this reason, it is hardly affected by the longitudinal pulsation that occurs in the header pipe, and when the fountain starts, when the pressure in the header pipe becomes almost constant, all the fountain nozzles simultaneously blow the fountain at the same flow rate. To do. In addition, since the space between the upper end of the water conduit and the top of the peripheral wall of the header pipe is small, the fountain is less affected by the air remaining in the header pipe, and each fountain nozzle is stopped when the fountain is stopped. Since the amount of water that naturally flows down from the water is very small in the above space, it is not affected by the pulsation that occurs in the pipe, and the nasal sagging phenomenon does not occur. Further, since it is not necessary to provide an air vent device, the design is simple and simple, and the manufacturing and assembling are easy.

[Brief description of drawings]

FIG. 1 is a partial sectional front view of a part of a water curtain fountain device according to the present invention.

FIG. 2 is a cross-sectional view of FIG. 1 as viewed from the left.

[Explanation of symbols]

 1 Header pipe 2 Fountain nozzle 3 Water conduit

Claims (1)

[Scope of utility model registration request] 1. A water curtain fountain device in which downward facing fountain nozzles communicating with the inside of a horizontal header pipe are attached to the bottom wall of a horizontal header pipe at predetermined intervals in the longitudinal direction of the header pipe. Is a water curtain fountain device having a standing water pipe that opens near the top of the peripheral wall of the header pipe.