JPH059674U - Intermittent fountain - Google Patents

Abstract

(57) [Abstract] [Purpose] A sharp rod-shaped water mass whose end is sharply cut right beside is ejected intermittently from the fountain nozzle 3, and the caliber of the fountain nozzle 3 is not changed, so that the structure is simple. Make it possible to change the height of the fountain. [Structure] A cylinder 6 provided with a fountain nozzle 3 is connected to a fountain pipe 4 of a fountain system 1, and a piston 7 is moved forward by high pressure water sent to the cylinder 3 under the control of an intermittent fountain control valve 5, and this movement is performed. After the high pressure water is guided from the inlet side to the outlet side of the cylinder 7 by the bypass passage 8 to be ejected from the fountain nozzle 3 while the piston 7 passes through the outlet side opening 8b of the bypass passage 8, The water is sprayed from the nozzle 3 all at once by the movement of the piston 7, and the piston 7 is returned by its own weight by the pressure relief action of the pressure relief portion 9.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an intermittent-type fountain device that arouses topicality by performing intermittent fountains to enhance the show effect of the fountains.

[0002]

[Prior Art]

 Conventionally, as an intermittent fountain device for performing intermittent fountain, for example, one shown in FIG. 4 is known. In this intermittent fountain device, an intermittent fountain control valve 5 made of a magnet valve is provided in the middle of a fountain pipe 4 which connects a discharge port 2A of a pump 2 constituting a fountain system 1 and an inlet 3A of a fountain nozzle 3. It has an intervening structure. 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 can be intermittently ejected from the fountain nozzle 3, so that a simple continuous fountain Compared with the above, the show effect of the fountain will be enhanced and the topicality will be aroused. However, in the pilot type underwater solenoid valve used as the intermittent fountain control valve 5, it takes 0.2 to 0.3 seconds from the fully open state to the fully closed state. In other words, during 0.2 to 0.3 seconds from the time when the valve is closed, water continues to flow even though the passage section of the valve is reduced, so the rod-shaped water jetted intermittently from the fountain nozzle 3 The end of the water mass is gradually tapered in diameter corresponding to the ejection length of 0.2 to 0.3 seconds, and the end of the rod-shaped water mass is sharply cut right beside It was not possible to achieve a good fountain appearance.

An intermittent type 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, a fountain nozzle 3 is provided at the outlet of the cylinder 6, and A piston 7 having a small hole 7a penetrating in the axial direction is housed inside a solder 6, and an intermittent fountain control valve 5 composed of a magnet valve is provided in the fountain pipe 4 to interpose it. In this intermittent fountain device, the intermittent fountain control valve 5 is opened and high-pressure water is sent from the pump 2 into the cylinder 6 to push up the piston 7 and the water in the cylinder 6 existing above the piston 7 is sprayed. 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 in the lower part of the piston 7 passes through the small hole 7a and reaches the upper part of the piston 7. Since it can move, the piston 7 descends to the bottom dead center by its own weight and prepares for the next fountain. Therefore, in accordance with the opening / closing cycle of the intermittent fountain control valve 5, a rod-shaped water mass having a predetermined length and outer diameter set by the diameter of the fountain nozzle 3 and the cylinder internal volume of the upper portion of the piston 7 at the bottom dead center is sprayed. It can be ejected intermittently from the nozzle 3. In this intermittent-type fountain device, the piston 7 is pushed up by the discharge pressure of the pump 2 so that the rod-shaped water mass is ejected from the fountain nozzle 3, so that the end of the rod-shaped water mass is cut almost directly to the side. It has the advantage of realizing a fountain shape. Therefore, it is possible to further enhance the show-like effect of the fountain and raise the topicality as compared with 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, the pressure obtained by the rise of the piston 7 is limited, and the fountain height can be increased. It has the drawback that it cannot.

[0004]

[Problems to be solved by the device]

 The problem to be solved is that the end of the rod-shaped water mass ejected intermittently from the fountain nozzle is sharply cut right next to it, and it is not possible to realize a crisp fountain state. Even if the height of the fountain is changed without changing the bore diameter, the pressure obtained by the rise of the piston is limited and the height of the fountain cannot be increased.

[0005]

[Means for Solving the Problems]

 According to the present invention, 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, a bypass passage is formed that bypasses the piston and guides the high-pressure water from the inlet side to the outlet side of the cylinder. And a pressure relief portion is provided between the bypass passage and the bypass passage.

[0006]

[Action]

 According to the present invention, when high-pressure water is sent from the fountain pipe to the cylinder by the control of the intermittent fountain control valve, the piston, which is located at the starting position and blocks the communication between the bypass passage and the cylinder inlet, moves forward (raises). ), The high-pressure water is bypassed from this point of time until the blockage state of the communication between the bypass passage and the inlet of the cylinder is released, and from this point until the piston passes or closes the outlet side opening of the cylinder in the bypass passage. It flows from the inlet side to the outlet side of the cylinder through the passage and is ejected from the fountain nozzle. In other words, the high-pressure water comes out from the fountain nozzle ahead of the piston. The flow of high-pressure water through the bypass passage is completed when the piston passes or closes the outlet side opening of the cylinder in the bypass passage.From this point, the high-pressure water flows toward the fountain nozzle side before the piston. The water remaining in the cylinder is pressed by the piston and ejected from the fountain nozzle all at once. In addition, during the period from when the piston passes through or closes the outlet side opening of the cylinder in the bypass passage until it closes the inlet of the fountain nozzle, the rod-shaped water mass is ejected all at once from the fountain nozzle by the movement of the piston, and the cylinder outlet Since the fountain will be stopped when all the water on the side is discharged, it is possible to realize a crisp fountain shape in which the end of the rod-shaped water mass is sharply cut right next to it. Further, the height of the fountain can be changed without changing the diameter of the fountain nozzle by adjusting the length of the bypass passage and the passage area of the bypass passage. During this time, the high-pressure water flows out from the pressure relief portion, but the above-mentioned operation can be performed if the passage cross section of the pressure relief portion is set 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 is flowing out from the pressure relief portion, the pressure in the cylinder is lowered and the piston is lowered by its own weight to return to the start position. Therefore, at a time interval corresponding to the control cycle of the intermittent fountain control valve, a rod-shaped water mass with a predetermined outer diameter and length set by the diameter of the fountain nozzle and the amount of high-pressure water that precedes the piston is created. The water can be ejected intermittently from the fountain nozzle.

[0007]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings. Note that the same or corresponding portions as those in FIGS. 4 and 5 are designated by the same reference numerals and will be described. In FIG. 1, the fountain system 1 of the intermittent fountain device is composed of a pump 2, a fountain pipe 4 connected to a discharge port 2 A 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 made of a solenoid valve is provided in the middle of the fountain pipe 4. Has been done. A spherical piston 7 is housed in the cylinder 6, and a bypass passage 8 is formed in the peripheral wall of the cylinder 6. As shown in FIG. 2, four bypass passages 8 are formed at equal intervals in the circumferential direction. In addition, 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 / closing excitation coil of the intermittent fountain control valve 5 has a valve opening signal and a valve closing signal from the controller 10. A signal is output.

With such a structure, when the intermittent fountain control valve 5 is opened by the 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, which is located at the starting end position and blocks the communication between the bypass passage 8 and the inlet of the cylinder, advances (raises). During the forward movement of the piston 7, the sliding contact portion of the piston 7 with the cylinder 6 passes through the cylinder inlet opening 8a of the bypass passage 8 to release the communication cutoff state between the bypass passage 8 and the cylinder inlet. At this point, the high pressure water flows from the inlet side of the cylinder 6 to the outlet side through the bypass passage 8 and is ejected from the fountain nozzle 3. In other words, 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 side opening 8b of the cylinder in the bypass passage 8.

When the flow of high-pressure water through the bypass passage 8 is completed at the time when the piston 7 that continues to move forward by the high-pressure water passes through the outlet side opening 8 b of the cylinder in the bypass passage 8, the piston 7 goes ahead of the piston 7. Then, the water remaining in the cylinder 6 can be ejected from the fountain nozzle 3 at a stroke by being pressed by the piston 7 which continues to move forward by the high pressure water. During this time, the high-pressure water flows out from the pressure relief portion 9, but the passage section of the pressure relief portion 9 is set small, so that the above-described operation can be performed. When the intermittent fountain control valve 5 is closed by the control signal from the controller 10 at the time when the piston 7 reaches the top dead center or immediately before reaching the top dead center, water is flowing out from the pressure relief portion 9, The pressure on the downstream side of the intermittent fountain control valve 5 in the pipe 4 decreases, and the piston 7 descends due to its own weight and returns to its original position to prepare for the next fountain. Therefore, at a time interval corresponding to the opening / closing cycle of the intermittent fountain control valve 5, a predetermined outer diameter and length set by the diameter of the fountain nozzle 3 and the amount of high-pressure water that precedes the piston 7 are provided. It is possible to eject the rod-shaped water mass intermittently from the fountain nozzle. Further, after the piston 7 passes through the outlet side opening 8b of the cylinder in the bypass passage 8, the water on the outlet side of the cylinder 6 is ejected in order to eject the rod-shaped water mass from the fountain nozzle 3 all at once by the movement of the piston 7. Since the fountain will be stopped when all the water is discharged, it is possible to achieve a sharp fountain shape in which the end of the rod-shaped water mass is sharply cut right next to it, thus enhancing the show effect of the fountain and increasing the topicality. It becomes possible to evoke.

On the other hand, under a constant pressure of high-pressure water that moves 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 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 that moves the water, complicated electrical control can be performed without changing the diameter of the fountain nozzle 3. With a simple configuration that omits the use of the system, it is possible to raise the topicality by changing the height of the fountain to enhance the show-like effect of the fountain.

FIG. 3 shows a modified example of the present invention, in which two bypass passages 8 and 8 are formed in the cylinder 6 at upper and lower positions. With this configuration, the rod-shaped water mass can be jetted twice during the movement of the piston 7 from the bottom dead center to the top dead center. It becomes possible to arouse.

In the above-described 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, but instead of this, intermittent fountain control A pressure relief valve may be provided between the valve 5 and the inlet of the cylinder 6 to form the pressure relief section 9. Further, instead of the spherical piston 7, a disc-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 side opening 8a of the cylinder in the bypass passage 8, the front end portion of the piston 7 causes the outlet side of the cylinder in the bypass passage 8 to pass. The high-pressure water flows through the bypass passage 8 from the inlet side to the outlet side of the cylinder 6 until the opening 8b is closed. Further, the intermittent fountain control valve 5 which is an electromagnetic valve may be replaced with an intermittent fountain control valve 5 which is manually opened and closed.

[0013]

[Effect of the device]

 As described above, according to the present invention, after the piston has passed or closed the outlet side opening of the cylinder in the bypass passage, the rod-shaped water mass is ejected from the fountain nozzle all at once by the movement of the piston, and the water on the outlet side of the cylinder is ejected. Since the fountain will be stopped when all the water has been discharged, it is possible to achieve a crisp fountain in which the end of the rod-shaped water mass is sharply cut right next to it. 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 passage area of the bypass passage under constant pressure of high-pressure water that moves the piston at a constant speed. This makes it possible to change the height of the fountain without changing the diameter of the fountain nozzle and with a simple configuration that does not require the use of a complicated electrical control system. , It has an advantage that it is possible to raise the topicality.

[Brief description of 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 modified example of the present invention.

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

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

[Explanation of symbols]

 1 Fountain system 3 Fountain nozzle 4 Fountain pipe 5 Intermittent fountain control valve 6 Cylinder 7 Piston 8 Bypass passage 9 Pressure relief section

Claims (1)

[Claims for utility model registration] [Claim 1] A fountain system fountain pipe is connected to an inlet of a cylinder provided with a fountain nozzle at an outlet, and an intermittent fountain control valve is provided in the fountain system, and the cylinder is provided in the cylinder. While the piston is accommodated, in the middle of the forward movement of the piston by the high pressure water sent from the fountain pipe to the cylinder,
A bypass passage for guiding high-pressure water from the inlet side of the cylinder to the outlet side of the piston is formed, and a pressure relief portion is provided between the intermittent fountain control valve and the bypass passage. Fountain device.