JPH083278B2 - Running device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water flowing device installed in a park, a building or the like.

[0002]

2. Description of the Related Art In many cases, a flowing water device imitating a stream of a stream is installed in a park, an amusement park, a building or the like. In these devices, a method of circulating running water to reduce water consumption is used. In this case, conventionally, the apparatus was simplified by dividing the running water tank into upper and lower parts by a substantially horizontal opaque partition wall, flowing the main water flow for viewing on the upper side, and flowing the return water flow on the lower side. The reason why the partition wall is made opaque is that the flow of bubbles and the like in the return water flow is opposite to the main water flow in the upper part and becomes unnatural. In such a device, since the return water flow does not enter the field of view, it is desirable to make this cross-sectional area as small as possible and increase the cross-sectional area of the main water flow.

[0003]

Generally, in a circulating flow device in a steady flow state, the amount of main water flow and the amount of return flow water are equal. Therefore, in order to reduce the cross-sectional area of the return flow channel and effectively reduce its volume, it is required that the flow velocity of the return flow channel be sufficiently higher than the flow velocity of the main water flow channel. This requirement is met by applying a large water pressure over the water flow resistance of the return flow channel to the water supply end of the return flow channel. However, in the conventional water tank having the partition wall structure, the partition wall forming one surface of the return flow channel is deformed by the low water pressure, and it is difficult to increase the water pressure resistance. If the partition wall is modified to be supported by a large number of columns, it will withstand high water pressure, but the structure will be complicated and manufacturing will be difficult. If this is avoided and the velocity of the main water flow and the velocity of the return flow are about the same, the cross-sectional area of the main water flow and the cross-section of the return water flow are about the same, and the return flow channel that cannot be seen is enlarged and the device becomes larger. did. In addition, the equipment load was increased due to the large amount of water in the return flow channel, and the installation location was strongly restricted. The present invention aims to effectively reduce the size and weight of a flushing device by increasing the return flow velocity and reducing the cross-sectional area of the return flow channel, reducing the construction space and cost, and relaxing the installation conditions. There is.

[0004]

For the above object, in the flushing device according to the present invention, the return flow channel is constituted by a rectangular pipe having a rectangular or regular polygonal cross section having a high water pressure resistance and a good space factor. . A large number of rectangular pipes are laid from the downstream part of the main water stream to the upstream part,
A water circulation nozzle is arranged near the water supply end of each pipe. This nozzle is connected to a water circulation motor pump via a water supply pipe.

[0005]

In this water flow device, the high-pressure water supplied from the water circulation motor pump is jetted from the water circulation nozzle into a jet water flow and is ejected near the water feed end of the rectangular pipe.
At this time, the water around the nozzle is pushed into the rectangular pipe by the action similar to that of the jet pump (or jet pump), so that the pressure at the water sending end rises, and a high-speed return water flow is generated in each rectangular pipe. Each square pipe easily withstands this high water pressure. As a result of the large flow velocity of the return water flow, even if the total cross-sectional area of the square pipe group is significantly reduced as compared with the cross-sectional area of the main water flow, the return flow amount equal to the main water flow amount can be flowed in the square pipe group.

[0006]

EXAMPLES Next, the present invention will be described with reference to examples. FIG. 1 shows a cross-sectional view of a water flow apparatus according to the present invention, and FIG. 2 shows a plan view of the apparatus. In Fig. 1, the bottom of the aquarium 1, which is 20 meters long, 2 meters wide, and 30 centimeters deep and is installed almost horizontally, is waterproofed, and the cross-sectional area of 10 cm x 5 cm is placed on it. A group of stainless square pipes 3 having a total number of 13 (a total of 13 pipes) are fixed in close contact with each other. Each water supply end of the square pipe group 3 (left side of the figure)
A water circulation nozzle group 4 is provided in the. Water pressure adjusting manual valve 5 for adjusting the water supply pressure to the nozzle group 4
Is provided in the middle of the water supply pipe 6, and one end of the water supply pipe 6 is connected to a submersible turbine pump 7 for water circulation. When power is supplied to the motor pump 7, about 2 kgf / cm
The pressurized water ² is supplied to the nozzle group 4 and is jetted from the tip of each nozzle into each rectangular pipe. This jetted water pushes the water around the nozzle group 4 into the square pipe group 3 by the same action as the jet pump, so that the inside of each square pipe is directed toward the water outlet end (right side in the figure) at a speed of 1.2 seconds / second. A fast stream of water with an average velocity on the order of meters is produced. As a result, the water level on the right side of the aquarium rises, and the water 2 on the upper side of the aquarium flows as the main water stream from the upper side of the river (right side) toward the lower side of the river (left side) at an average speed of about 40 cm per second. The water reaching the left end of the water tank is pushed into the rectangular pipe group 3 by the circulation nozzle group 4 and discharged to the right end of the water tank for circulation. In this device, the velocity of the return water flow is about 3 times that of the main water flow.
Although it is selected to be doubled, it is possible to further increase the magnification by increasing the water supply pressure to the nozzle group 4. The square square pipe can easily withstand the water pressure of about 0.1 kgf / cm ² generated at this time, and has a higher space factor than a circular pipe or the like. As a result, the cross-sectional area of the return flow channel can be reduced to about one third or less of that of the main water flow channel, and the space of the return flow channel can be reduced. In addition, when the fountain flow from the circulation nozzle is used for water circulation, it becomes possible to efficiently perform water circulation using a small high-rotation turbine pump, which promotes reduction in size and weight of the device. In this example, one circulation nozzle is used for one square pipe, but a plurality of circulation nozzles may be used for one square pipe depending on the squareness ratio and sectional area of the pipe cross section. In addition, if both ends of the rectangular pipe are bent along an arc, the efficiency of flowing water direction change can be improved.
In either case, it is necessary to appropriately increase or decrease the thickness and quantity of the rectangular pipes according to the return flow water pressure and the width and depth of the main water flow. The submersible motor pump 7 for circulation may be replaced with a land pump installed outside the water tank.

[0007]

As described above, in the device according to the present invention, since the return flow channel is formed by the rectangular pipe, the cross-sectional area of the return flow channel is made small and the water pressure difference between both ends of the pipe is made large so that the return flow channel becomes large. Is accelerating. As a result, the volume of the return flow canal is reduced, and the equipment is smaller and lighter. As a result, the construction space, weight and construction cost are greatly reduced compared to the conventional equipment, and it can be installed even in a building with a small allowable floor load. Becomes Further, since the structure of the device is simple, it has advantages that it is easy to manufacture and there are few failures.

[Brief description of drawings]

1 is a cross-sectional view of a flushing device according to the present invention,

2 is a plan view of the apparatus of FIG.

[Explanation of symbols]

(1), water tank (2), running water (3), rectangular pipe for reflux (4), nozzle for circulation (5), water pressure adjusting valve (7), motor pump for water circulation

Claims (1)

[Claims] 1. A water tank or the like for holding running water, a water circulation pump, a plurality of circulation nozzles for ejecting the feed water of the pump into the water, and a plurality of rectangular pipes arranged at one end of the nozzle, A flowing water device, wherein a rectangular pipe constitutes a part of a reflux water passage of the flowing water.