JPH0525732Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an apparatus for forming a transparent bar-shaped fountain column into an arch shape.

[Prior Art] When attempting to form an arch using a transparent rod-shaped fountain column, conventionally, a rectifier made of a wire mesh is inserted inside the fountain nozzle body of a fountain device to remove eddy currents in the fountain and reduce the vortex in the air. A method was used to prevent the fountain from scattering. The wire mesh rectifier has a simple structure and is easy to manufacture, yet it has a high rectifying effect.

[Problems to be solved by the invention] However, wire mesh rectifiers have the disadvantage that they have poor permeability for debris that gets mixed into the water supplied to the nozzles, leading to clogging in a short period of time and lowering the height of the fountain. Installing a filter in a water supply channel for the purpose of removing trash requires a large amount of space, making the device larger.
If a small filter was used to avoid this problem, the filter material would clog quickly, making it necessary to replace the filter material frequently. A method of using a grid plate instead of a wire mesh as a rectifier is also known, but this method requires high precision and is difficult to manufacture, resulting in a high price.

In view of these points, it is an object of the present invention to provide a rectifier to be installed in a fountain nozzle device that does not cause clogging, is easy to manufacture, and provides a high rectifying effect.

[Means for Solving the Problems] For the above purpose, in the fountain device of the present invention, a rectifier consisting of a number of hollow pipes and a flow guide needle following the rectifier are arranged parallel to the water flow. .

[Operation] Water flowing in from the water supply port of the fountain nozzle body passes through a rectifier consisting of a group of pipes. The eddy current present in the water flow flows in from an oblique direction with respect to the central axis of each hollow pipe of the rectifier. This oblique component flow is attenuated when passing through the rectifying pipe, and becomes a flow only in the direction of the central axis. Therefore, there is almost no vortex in the water flow that has passed through the rectifying pipe group, and the subsequent generation of vortices is suppressed by the action of the guide needles that equalize the flow velocity. As a result, a water stream without swirls is ejected from the nozzle opening.

Compared to a wire mesh placed perpendicular to the water flow, pipes placed parallel to the water flow can have a longer interaction time with the water flow. For this reason, pipes can provide a higher rectification effect, and the diameter of each rectifier pipe can be selected to be larger than that of the wire mesh. Therefore, garbage can pass through the rectifier pipe without clogging it. In addition, it is easier to manufacture than a rectifier using a grid plate.

[Examples] Next, the present invention will be described in detail using examples.

FIG. 1 shows the structure of a fountain nozzle body according to the present invention.

Pressurized water of about 0.4 kg/ ^cm2 is supplied from the bottom of the water supply pipe to the fountain nozzle body 2. The nozzle body 2 is bullet-shaped, with a maximum diameter D of about 10 cm and a length of 5 times D.
The head is fitted with two nozzles with a diameter of 1 cm.
A. A flow straightener 3 consisting of 12 brazed circular copper pipes 3A is fixed inside the nozzle body 2. The length of the pipes 3A is equal to the inner diameter D of the nozzle body.
The diameter is selected to be about 1/4.5 of D.

FIG. 2 is a plan view of the rectifier 3. A support for the flow guide needle 4 is placed in the center of the 12 hollow pipes 3A. When water flows through the hollow pipe 3A, the vortex component in the flowing water is attenuated by the resistance on the pipe surface, resulting in a flow in the direction of the central axis. Therefore, there is almost no swirl in the flow leaving the rectifier 3 and heading towards the nozzle opening.

A lower part of a flow guide needle 4 made of brass is screwed to a support at the center of the rectifier 3. The length of the guide needle 4 is selected to be approximately 3D, and its pointed end is
Make it protrude from the nozzle opening 2A by about mm. The head of the flow guide needle 4 equalizes the speed of the water flow near the nozzle port 2A, where the flow speed gradually increases, by the water flow resistance on the head surface, and suppresses the generation of vortices near the nozzle port 2A. . As a result, the fountain coming out of the nozzle is
It does not disperse in the air and becomes a transparent rod shape.

The shape of the pipe 3A is not limited to circular, but may also be hexagonal or square.
It can also be square. Further, the material is not limited to metal, but may also be plastic or the like.

FIG. 3 is a configuration diagram of an arch fountain device using the fountain nozzle described in FIG. 1.

Fresh water is stored inside the water tank 5, and a submersible pump 6 is fixed to the water tank via a support frame. Pressurized water from the pump 6 is supplied to the fountain nozzle body 2 via a vibration-proof hose 7 for blocking vibrations of the pump and water pressure. The nozzle body 2 is installed on the support frame at an elevation angle of about 45 degrees. When the pump 6 is operated, transparent rod-shaped water is spouted from the fountain nozzle 2 and falls in a parabola without being dispersed in the air to form an arch. Since the fountain does not disperse, there is no risk of people getting wet even if they pass under the arch.

[Effects of the invention] In the fountain nozzle device of the invention, since the rectifier is composed of a thick hollow pipe that is easy to manufacture and has a high angle accuracy in the center direction, there is no fear that the water supply will be clogged with debris. As a result, it becomes possible to omit the large-sized filter required in the conventional apparatus, and there is no need to replace the filter medium, making maintenance and inspection of the apparatus easier. Further, the fountain device is not only smaller and has less restrictions on the installation location, but also has advantages such as being able to reduce the cost.

[Brief explanation of the drawing]

Figure 1 is a sectional view of the fountain nozzle body according to the present invention, Figure 2 is a plan view of the rectifier in the nozzle body of Figure 1, and Figure 3 is a configuration diagram of an arch fountain device using the fountain nozzle of Figure 1. It is. 2... Fountain nozzle body, 3... Rectifier, 4...
Direction needle, 5... Water tank, 6... Submersible pump, 7...
...An anti-vibration hose.

Claims (1)

[Scope of utility model registration request] A fountain device comprising: a fountain nozzle body including a rectifier made of a hollow pipe and a flow guide needle; and a water pump supplying pressurized water to the nozzle.