JPH05115625A - Water-flow control apparatus - Google Patents

Abstract

PURPOSE:To modify a dam into any shape and control both the speed of water flow and the magnitude of a water fall and to control the degree of difficulty of a canoe course for example, by providing the dam for which a plurality of columns are telescopically buried in an artificial or natural river-bed neighboring with each other, in order to be allowed to appear and disappear at will. CONSTITUTION:An area crossing the midway part of an artificial river 10 is set, and an artificial river-bed is formed in this area. A plurality of piston cylinder mechanisms 14 are buried in the artificial river-bed, and dam constructions 16, which comprise constructions for causing the resistance of a flow way, are allowed to appear or disappear, by these piston cylinder mechanisms 14. The dam constructions 16 are formed so that a plurality of columns 26, each of which is mounted on the rod projecting toward the inside of water at the artificial river-bed by following the rise of a piston and is in the shape of a cylinder with a bottom, are placed in a matrix shape. A dam is composed of these columns 26 which are allowed to closely neighbor with each other. When the projecting amount of each of the columns 26 is properly controlled, the shape of the dams constructions 16 can be varied and water falls can be partially produced. In the case of a canoe course, therefore, the degree of difficulty of the course can be controlled.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water flow control device, and more particularly to a water flow control device adapted to a canoe course so that its difficulty level can be adjusted.

[0002]

2. Description of the Related Art Conventionally, canoe courses have been conducted using natural rivers or artificially constructed rivers. However, the forms of rivers are infinite, and it is very difficult to select or construct a natural river or an artificial river that matches the river where canoeing competitions are held.

Under such circumstances, practicing on the river, which is suitable for improving the canoe, is indispensable from the viewpoint of safety. The course difficulty is set by adjusting the drop of the flow to the "se", but conventionally, the difficulty on the artificial canoe course was adjusted by changing the amount of water.

[0004]

However, in the conventional method, the structure constructed to form the flow dip may be exposed or submerged depending on the amount of water.
The difficulty level could not be set freely, and it was difficult to partially control the difficulty level. Moreover, it was difficult to change the characteristics of the course when the course was set up imitating a river that exists in nature.

The present invention has been made in order to solve the above-mentioned conventional problems. By changing the height of the weir structure that sets the drop of the river flow, the flow velocity is partially changed, and An object of the present invention is to provide a water flow control device in which the shape of a drop can be changed by changing the shape of a weir, and the characteristics of the course can be arbitrarily changed and adjusted.

[0006]

In order to achieve the above-mentioned object, a water flow control device according to the present invention embeds a plurality of columnar bodies adjacent to each other in a natural or artificial river bottom, and the respective columnar bodies appear and disappear. By making possible weirs and making the water depth above the pillars variable, the river water flow can be controlled.

[0007]

According to the above construction, the weir portion that forms a so-called ridge in which the riverbed of the river has a large inclination and the flow velocity is fast and is in a turbulent state is constituted by a plurality of columnar bodies, and each columnar body is formed into an arbitrary shape. Appearance control is performed so that the height is reached. This can be adjusted by a hydraulic cylinder mechanism, a pinion rack mechanism, or the like. The height of the upper surface of the columnar body and the water surface, that is, the water depth can be changed by adjusting the protruding / retracting amount of the columnar body. When the water flow is constant, the flow velocity of the water flow is changed depending on the water depth, and the head is changed by adjusting the amount of the columnar body protruding and retracting.
As a result, the drop of the flow can be adjusted arbitrarily, the size of the current can be changed arbitrarily, the water flow can be changed, and the difficulty level of the canoe course can be adjusted freely.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific embodiments of the water flow control device according to the present invention will be described below in detail with reference to the drawings.

FIG. 1 shows the overall configuration of a water flow control device according to an embodiment. As shown in this figure, set a region that crosses the middle of the artificial river (or natural river) 10,
An artificial river bed 12 is provided in this area. A plurality of piston-cylinder mechanisms 14 are embedded in the artificial river bed 12, and a weir structure 16 that is driven to rise in water by the piston-cylinder mechanisms 14 to form a flow path resistance structure is installed on the river bed 12. Is doing.

As shown in FIG. 2, each piston-cylinder mechanism 14 embedded in the artificial river bed 12 has a cylinder 18 buried vertically in the artificial river bed 12, and the piston 20 is installed in the cylinder 18. A rod 22 is attached so as to be slidable, and a rod 22 is attached to the piston 20 so as to project from the artificial river bed 12 into the water in accordance with the elevation thereof. A cylindrical columnar body 26, which is slidably fitted on the outer peripheral surface of the cylinder 18 and has a tip closed by an end plate 24, is attached to the rod 22. Rod 2
2 is inserted into the inside of the columnar body 26, and the tip end is connected to the inner surface of the end plate 24, whereby the columnar body 26 is directly driven into and out of water by the expansion and contraction operation of the rod 22. .. Although not shown, the inner space of the hollow columnar body 26 can be ventilated with the lower chamber of the artificial floor 12 by a ventilation passage formed on the outer surface of the cylinder 18 so that the internal air can be supplied and exhausted as it moves up and down. I have to. Therefore, by supplying and discharging the hydraulic oil into and from each chamber of the cylinder 18 defined by the piston 20, the columnar body 26 is moved in and out of the river bed 12 upward, and the amount of protrusion thereof can be adjusted.

A plurality of piston-cylinder mechanisms 14 including such columnar bodies 26 are arranged in a matrix on the artificial river bed 12 so that the columnar bodies 26 are closely adjacent to each other and can protrude from the river bed 12 in a forested state. .. Individual columns 2
In order to raise and lower 6 independently, hydraulic passages 28U and 28D communicating with the compartments of each cylinder 18 are connected to the pump 30 and the tank 32, and the directional control valve 3 interposed in the middle is connected.
The hydraulic action chamber is switched according to 4. An electromagnetic variable flow rate control valve 36 is provided in a branch passage connected from the pump 30 to each cylinder 18, and the amount of oil supplied to the cylinder 18 is adjusted by the control amount of this valve 36, so that the columnar body 26 is moved up and down. The amount can be adjusted. Further, a cut-off valve 38 is provided at the discharge end of the pump 30 and the inflow end to the tank 32, which cuts off the flow of hydraulic oil when the columnar body 26 reaches a predetermined height, and cuts off the hydraulic pressure. A lock is formed to hold the columnar body 26 at a predetermined height.

The above-described pump 30, tank 32, cut-off valve 38, etc. are housed in a power unit 40 as shown in FIG. 1, and the direction switching valve 34, flow control valve 36, etc. are attached to the piston cylinder mechanism 14. It may be built in the module unit 42. And
The controller 4 for controlling the pump 30, the direction switching valve 34, the flow control valve 36, the cutoff valve 38, and the like.
4 is installed, by which drive control of the piston cylinder mechanism 14 is performed, the plurality of columnar bodies 26 are projected in a predetermined pattern, and the protruding shape of the dam structure 16 is determined. This can be realized by storing a predetermined pattern in the memory in advance and controlling and driving the flow rate control valve 36 so as to obtain this pattern.

A method of adjusting the course difficulty by applying the water flow control device thus constructed to a canoe course is as follows. The artificial river 10 is used as a course, and the device is installed on the way. The columnar bodies 26 arranged in a matrix are individually driven up and down by the power unit 40 and valve control by the controller 44.
In the initial storage state, 6 is in the same row as the river bed 12, and since no flow drop occurs, a normal flow is generated. When the height of the columnar body 26 is gradually increased, the water in the upper portion of the columnar body 26 flows out in the lateral direction, the water depth in the upper portion becomes small, and the amount of water decreases. Therefore, by changing the projecting height of the columnar body 26, as shown in FIG. 2, the water depths H ₁ and H ₂ are different depending on the projecting amount, and the upper water amount of each columnar body 26 is also different. As a result, depending on the set height of each columnar body 26, the flow velocity passing through that portion changes, and the size of the flow drop also changes.

Therefore, specifically, as shown in FIG. 1, the height of the center of the weir structure 16 is set to be gradually lower toward the downstream side, and both end portions are higher than the central portion. With this setting, the amount of water above the weir structure 16 can be maintained at an appropriate amount, and the height of each columnar body 26 can be arbitrarily adjusted using this as a basic pattern. Therefore, the shape of the weir structure 16 is set to an arbitrary shape, and by partially increasing the height, the backflow (BackWash) can be increased in the downward flow that is flowing down from now on, and the difficulty of the course can be increased. This makes it possible to reduce the difficulty level. That is, the course difficulty can be arbitrarily adjusted by changing the shape of the weir structure 16 without changing the total amount of water flowing into the river 10.

According to such a device, the shape of the weir structure 16 forming the stopper set in the river 10 is changed to partially give a head, and the flow velocity at that portion is changed, whereby the "seed" is generated. You can control the difficulty level of the stopper inside. Therefore, there is an effect that a wide range of courses can be set from beginners to experts, and the stopper existing in a natural river can be simulated by changing the shape of the lip forming the stopper. For this reason, in the artificial canoe course equipped with the device, a wide range of users can enjoy canoeing with a single canoe course, which can handle a wide range from beginners to rodio kayaking and squat kayaking.

[0016]

As described above, according to the water flow control device of the present invention, a weir that allows a plurality of pillars to be buried adjacent to the bottom of a natural or artificial river and each pillar can appear and disappear. Since the river water flow can be controlled by providing a variable water depth in the upper part of the columnar body, the shape of the weir can be arbitrarily changed to control the flow velocity and the size of the drop flowing through it, and the canoe course As a result, the excellent effect that the course difficulty level can be arbitrarily adjusted can be obtained.

[Brief description of drawings]

FIG. 1 is a perspective view showing an overall configuration of a water flow control weir according to an embodiment.

FIG. 2 is a partial cross-sectional configuration diagram of a weir structure.

[Explanation of symbols]

 10 Artificial River 12 Artificial River Bed 14 Piston Cylinder Mechanism 16 Weir Structure 26 Columnar Body 40 Power Unit 44 Controller

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shigeru Chiba 1 Yawata Kaigan Dori, Ichihara City, Chiba Mitsui Engineering & Shipbuilding Co., Ltd. Chiba Works

Claims (1)

[Claims] 1. A river water flow is formed by burying a plurality of pillars adjacent to each other on a natural or artificial river bottom, providing a weir that allows each pillar to appear and disappear, and varying the water depth above the pillars. A water flow control device characterized by being controllable.