JP2532973Y2 - Intermittent fountain device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an intermittent fountain device which performs an intermittent fountain to enhance the show-like effect of a fountain and raises topicality.

[0002]

2. Description of the Related Art Conventionally, as an intermittent fountain device for performing an intermittent fountain, for example, the one shown in FIG. 4 is known. This intermittent fountain device includes a pump 2 that constitutes a fountain system 1.
An intermittent fountain control valve 5 composed of a magnet valve is provided in the middle of a fountain pipe 4 connecting the discharge port 2A and the inlet 3A of the fountain nozzle 3. In this intermittent fountain device, a rod-shaped water mass having a length proportional to the opening / closing time interval of the intermittent fountain control valve 5 is formed according to the opening / closing time interval.
Can be intermittently ejected from the fountain, so that the show-like effect of the fountain can be enhanced as compared to a simple continuous fountain, and the topic can be evoked. However, the pilot-type underwater solenoid valve used as the intermittent fountain control valve 5 requires 0.2 to 0.3 seconds to change from the fully open state to the fully closed state. That is, from 0.2 to 0.
During 3 seconds, the water continues to flow while the passage cross section of the valve is reduced, so that the end portion of the rod-shaped water mass intermittently ejected from the fountain nozzle 3 is in the range of 0.2 to 0.3 seconds. The diameter of the rod-shaped water mass was gradually reduced in a taper shape by an amount corresponding to the jet length of the jet, and a sharp fountain state in which the end of the rod-shaped water mass was sharply cut right beside it could not be realized.

[0005] An intermittent fountain device shown in FIG. 5 is also known. In this intermittent fountain device, a cylinder 6 is attached to a fountain pipe 4 connected to a discharge port 2A of a pump 2 constituting a fountain system 1, and a fountain nozzle 3 is provided at an outlet of the cylinder 6, and a cylinder 6 is provided. A piston 7 having a small hole 7a penetrating in the axial direction is housed therein, and an intermittent fountain control valve 5 composed of a magnet valve is provided in the fountain pipe 4. In this intermittent fountain device, the piston 7 is pushed up by opening the intermittent fountain control valve 5 and sending high-pressure water from the pump 2 into the cylinder 6 to fountain the water in the cylinder 6 existing above the piston 7. It is ejected from the nozzle 3 as a rod-shaped water mass. When the intermittent fountain control valve 5 is closed when the piston 7 reaches the top dead center, the water in the cylinder 6 existing below the piston 7 moves to the upper part of the piston 7 through the small hole 7a. Since it is possible, the piston 7 descends to the bottom dead center by its own weight and prepares for the next fountain. Therefore, the intermittent fountain control valve 5
In accordance with the opening / closing cycle of the fountain nozzle 3, a rod-shaped water mass having a predetermined length and an outer diameter set by the diameter of the fountain nozzle 3 and the internal volume of the cylinder above the piston 7 at the bottom dead center is formed.
Can be ejected intermittently from In this intermittent fountain device, the rod-shaped water mass is ejected from the fountain nozzle 3 by pushing up the piston 7 by the discharge pressure of the pump 2, so that the end of the rod-shaped water mass is cut almost right beside the fountain. Is achieved. Therefore, the show-like effect of the fountain can be further enhanced and the topicality can be aroused more than the intermittent fountain device of FIG. However, in this intermittent fountain device, even if the fountain height is changed without changing the diameter of the fountain nozzle 3,
There is a limit to the pressure obtained by raising the piston 7, and there is a disadvantage that the height of the fountain cannot be increased.

[0004]

The problem to be solved is that it is impossible to realize a crisp fountain in which the end of a rod-shaped water mass ejected intermittently from a fountain nozzle is sharply cut right beside it. Even if the fountain height is changed without changing the diameter of the fountain nozzle, there is a limit to the pressure obtained by raising the piston, and the fountain height cannot be increased.

[0005]

According to the present invention, a fountain pipe is connected to an inlet of a cylinder having a fountain nozzle at an outlet, and an intermittent fountain control valve is interposed in the fountain system. While the piston is housed, a bypass passage that guides the high-pressure water from the inlet side to the outlet side of the cylinder while bypassing the piston during the forward movement of the piston by the high-pressure water sent from the fountain pipe to the cylinder is provided. And a pressure relief portion is provided between the intermittent fountain control valve and the bypass passage.

[0006]

According to the present invention, when high-pressure water is sent from the fountain pipe to the cylinder under the control of the intermittent fountain control valve, the piston, which is located at the start position and interrupts the communication between the bypass passage and the cylinder inlet, moves forward. (Up), the communication blocking state between the bypass passage and the inlet of the cylinder is released, and from this time until the piston passes or closes the outlet-side opening of the cylinder in the bypass passage, high-pressure water is supplied. It flows from the inlet side to the outlet side of the cylinder through the bypass passage, and is ejected from the fountain nozzle. That is, the high-pressure water is ejected from the fountain nozzle ahead of the piston. When the piston passes or closes the outlet opening of the cylinder in the bypass passage, the flow of the high-pressure water through the bypass passage is completed. The water remaining in the inside is pressed by the piston and spouted from the fountain nozzle at a stretch. Further, during the period from the time when the piston passes or closes the outlet opening of the cylinder in the bypass passage to the time when the inlet of the fountain nozzle is closed, the rod-shaped water mass is spouted from the fountain nozzle at a stroke by the movement of the piston, and the outlet of the cylinder is closed. Since the fountain is stopped when all of the water is discharged, a sharp fountain state in which the end of the rod-shaped water mass is sharply cut right beside can be realized. Furthermore, the height of the fountain can be changed without changing the diameter of the fountain nozzle by adjusting the length of the bypass passage, adjusting the passage area of the bypass passage, and the like. During this time, the high-pressure water flows out of the pressure relief portion, but the above-described operation can be performed by setting the passage cross section of the pressure relief portion small. The piston closes the inlet of the fountain nozzle and closes the intermittent fountain control valve when the ejection of the rod-shaped water mass is completed. Since water flows out of the pressure relief part, the pressure in the cylinder decreases, and the piston descends by its own weight and returns to the start position. Therefore, at a time interval according to the control cycle of the intermittent fountain control valve, a rod-shaped water mass having a predetermined outer diameter and a length set by the diameter of the fountain nozzle and the amount of high-pressure water ahead of the piston, It can be ejected intermittently from the fountain nozzle.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. The same or corresponding parts as those in FIGS. 4 and 5 are denoted by the same reference numerals and described. In FIG. 1, a fountain system 1 of an intermittent fountain device includes a pump 2, a fountain pipe 4 connected to a discharge port 2A of the pump 2, and a fountain nozzle 3. The fountain nozzle 3 is formed at the outlet of the cylinder 6, a fountain pipe 4 is connected to the inlet of the cylinder 6, and an intermittent fountain control valve 5 formed by an electromagnetic valve is interposed in the fountain pipe 4. ing. Cylinder 6
Accommodates a spherical piston 7, and a bypass passage 8 is formed in the peripheral wall of the cylinder 6. As shown in FIG. 2, the bypass passages 8 are formed at equal intervals in the circumferential direction.
One is formed. A pressure relief portion 9 formed by a horizontal through hole having a small passage cross section is formed near the inlet of the cylinder 6, and the opening and closing excitation coil of the intermittent fountain control valve 5 is provided with a valve opening signal and a valve closing signal from the controller 10. A signal is output.

With this configuration, when the intermittent fountain control valve 5 is opened by a control signal from the controller 10, high-pressure water is sent from the fountain pipe 4 to the cylinder 6. As a result, the piston 7 at the start end position, which has interrupted the communication between the bypass passage 8 and the cylinder inlet, moves forward (rises).
I do. During the forward movement of the piston 7, the sliding contact between the piston 7 and the cylinder 6 passes through the inlet-side opening 8 a of the cylinder in the bypass passage 8, thereby releasing the communication cutoff state between the bypass passage 8 and the cylinder inlet. At this time, the high-pressure water flows from the inlet side to the outlet side of the cylinder 6 through the bypass passage 8 and is ejected from the fountain nozzle 3. That is, the high-pressure water is ejected from the fountain nozzle 3 before the piston 7. This state is continued until the sliding contact portion of the piston 7 passes through the outlet opening 8b of the cylinder in the bypass passage 8.

When the flow of the high-pressure water through the bypass passage 8 is completed at the time when the piston 7 which continues to move forward by the high-pressure water passes through the outlet side opening 8b of the cylinder in the bypass passage 8, the piston 7 moves ahead of the piston 7. The water remaining in the cylinder 6 can be pressed from the fountain nozzle 3 at a stretch by being pressed by the high-pressure water with the piston 7 that continues to move forward. During this time, the high-pressure water flows out of the pressure relief section 9, but the above-described operation can be performed because the passage cross section of the pressure relief section 9 is set small. When the intermittent fountain control valve 5 is closed by the control signal from the controller 10 when the piston 7 reaches the top dead center or shortly before the piston 7 reaches the top dead center, the water is flowing out from the pressure relief part 9, The pressure on the downstream side of the intermittent fountain control valve 5 in the pipe 4 decreases, and the piston 7 descends by its own weight and returns to the original position, preparing for the next fountain. Therefore, at a time interval corresponding to the opening / closing cycle of the intermittent fountain control valve 5, the rod-shaped water having a predetermined outer diameter and a predetermined length set by the diameter of the fountain nozzle 3 and the amount of high-pressure water ahead of the piston 7 is set. The mass can be ejected intermittently from the fountain nozzle. After the piston 7 passes through the outlet opening 8b of the cylinder in the bypass passage 8, the piston 7
The fountain is stopped when all the water on the outlet side of the cylinder 6 is discharged in order to cause the rod-shaped water mass to squirt from the fountain nozzle 3 at a stretch by the movement of the water. Therefore, the end of the rod-shaped water mass is sharply cut right beside. Since the crisp fountain appearance can be realized, the show-like effect of the fountain can be enhanced and the topicality can be evoked.

On the other hand, under a constant pressure of high-pressure water for moving the piston 7 at a constant speed, the length of the bypass passage 8 is changed to adjust the amount of water passing through the bypass passage 8, and the piston 7 is moved at a constant speed. By changing the passage area of the bypass passage 8 and adjusting the amount of water passing through the bypass passage 8 under a constant pressure of the high-pressure water to be applied, the diameter of the fountain nozzle 3 can be changed without changing the diameter of the fountain nozzle 3. With a simple configuration that omits use, it is possible to change the height of the fountain to enhance the show-like effect of the fountain and to evoke topicality.

FIG. 3 shows a modification of the present invention, in which bypass passages 8 and 8 are formed at two upper and lower positions in a cylinder 6. With this configuration, the rod-shaped water mass can be ejected twice while the piston 7 moves from the bottom dead center to the top dead center, so that the show effect of the fountain is further enhanced and the topicality is increased. It will be possible to evoke.

In the above embodiment, the pressure relief portion 9 is described as being constituted by a horizontal through hole having a small passage cross section formed near the inlet of the cylinder 6. However, an intermittent fountain control valve is used instead. A pressure relief valve 9 may be formed by interposing a pressure relief valve between the inlet of the cylinder 5 and the cylinder 6. Further, instead of the spherical piston 7, a disk-shaped or cylindrical piston 7 may be used. When such a piston 7 is used, from the time when the rear end of the piston 7 passes through the inlet opening 8a of the cylinder in the bypass passage 8, the front end of the piston 7 causes the outlet opening 8b of the cylinder in the bypass passage 8 to be opened. The high-pressure water flows from the inlet side of the cylinder 6 to the outlet side of the cylinder 6 through the bypass passage 8 until the valve is closed. further,
Instead of the intermittent fountain control valve 5 constituted by an electromagnetic valve, an intermittent fountain control valve 5 which is manually opened and closed may be used.

[0013]

As described above, according to the present invention, after the piston passes or closes the opening on the outlet side of the cylinder in the bypass passage, the rod-shaped water mass is jetted out of the fountain nozzle at a stroke by the movement of the piston. The fountain is stopped when all of the water on the outlet side is drained, so that a crisp fountain state in which the end of the rod-shaped water mass is sharply cut right beside it can be realized. In addition, the amount of water passing through the bypass passage is adjusted, or the amount of water passing through the bypass passage is adjusted by changing the length or area of the bypass passage under a constant pressure of high-pressure water that moves the piston at a constant speed. This allows the fountain height to be changed with a simple configuration without changing the diameter of the fountain nozzle and without using a complicated electrical control system.
There is an advantage that it is possible to enhance the show-like effect of the fountain and evoke topicality.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing an embodiment of the present invention.

FIG. 2 is a cross-sectional plan view of a cylinder.

FIG. 3 is a sectional view showing a modification of the present invention.

FIG. 4 is a configuration diagram of a conventional example.

FIG. 5 is a configuration diagram of another conventional example.

[Description of Signs] 1 fountain system 3 fountain nozzle 4 fountain pipe 5 intermittent fountain control valve 6 cylinder 7 piston 8 bypass passage 9 pressure relief part

Claims (1)

(57) [Scope of request for utility model registration] 1. A fountain pipe for a fountain system is connected to an inlet of a cylinder having a fountain nozzle at an outlet, an intermittent fountain control valve is provided in the fountain system, and a piston is housed in the cylinder. During the forward movement of the piston by the high-pressure water sent from the fountain pipe to the cylinder,
An intermittent fountain control valve and a bypass passage are provided between the intermittent fountain control valve and the bypass passage; Type fountain device.