JPS6211123B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a water intake device installed in various waterways including agricultural water.

Generally speaking, this type of water intake device is often used by installing an intake port on an embankment or revetment on the upstream side of a waterway where a water gate is installed, and attaching a screen dust removal device such as a dust grid in front of this intake port. However, if the amount of dust that accumulates in front of the screen increases, the water intake capacity will decrease significantly, and there is a risk that water canals with low water levels, such as agricultural waterways, will not be able to take in water. It is necessary to look around the waterway every day and scoop up and remove debris with a net or the like each time. In order to eliminate the above-mentioned inconvenience, some large-scale intake systems are equipped with mechanical dust removal devices such as scraping rakes, but in small-scale waterways with low water levels, such mechanical dust removal devices are installed. It was structurally and economically difficult to equip the system, and everyone involved was equally troubled by the management of water intake from canals.

As a result of intensive research into this problem over many years, the inventor of the present invention has discovered that, through a unique concept of installing a unique water intake chamber in the middle of the sub-channel, water can always be taken regardless of the water level. Of course, we have succeeded in developing a completely new water intake device that has the ability to automatically remove obstacles such as debris that have accumulated at the water intake by skillfully utilizing the flow velocity of the subchannel. .

Hereinafter, this invention will be specifically explained with reference to drawings of embodiments. In the drawings, reference numeral 1 denotes a water gate consisting of a steel sluice gate installed at a key point of the main waterway W1;
2 is a managed bridge built adjacent to water gate 1,
In the case of the present invention, the waterway w on the upstream side of the water gate 1 and the waterway w' on the downstream side are connected by a subwaterway W2 having a predetermined riverbed gradient, and the gate 1a of the watergate 1 is lowered to close the main waterway W1. At this time, water in the main waterway W1 flows from the upstream waterway w to the downstream waterway w', bypassing the auxiliary waterway W2. Next, 3 in the drawing is a water intake chamber provided by digging down the river bed P in the middle part of the sub-channel W2.
is attached as a lid so as to be flush with the river bed surface P as shown in FIG. A submersible pump 6 is inserted into the chamber 5 from above.

Since the water intake device of the present invention has the above-described structure, water flowing from the main waterway W1 to the secondary waterway W2 when the water gate 1 is closed passes through the dust removal net 4 that is flush with the riverbed surface P and passes through the water intake chamber 3. After being pumped up by the submersible pump 6 in the pump room 5, the water is sent to the place of use via a predetermined pipe line. Therefore, obstacles such as dust mixed or floating in the water of the secondary waterway W2 will mainly accumulate on the surface of the dust removal net 4 above the water intake chamber 3, but in the case of the present invention, the riverbed slope of the secondary waterway W2 is the same as that of the main waterway W1. Since the slope of the river bed is much larger than that of the river bed, and the flow force is increased, the dust accumulated on the upper surface of the dust removal net 4 is automatically moved downstream by the flow force of the water flowing through the sub-channel W2. This is very advantageous because the more the accumulated amount of dust on the upper surface of the dust removal net 4, the more the area under pressure against the flowing water increases and the dust is easily washed away downstream. The river bed slope of the secondary waterway W2 is determined by the cross-sectional area of the secondary waterway, the size of the water intake, the riverbed slope of the main waterway, the average flow rate,
It is desirable to set the slope to be the most suitable for automatic flow down of accumulated obstacles, taking into consideration various conditions such as the mixing rate of garbage.

As described above, the water intake device of the present invention has a structure that mainly takes in water from the bottom flow layer from the water intake with a dust removal screen installed flush with the riverbed surface in the middle of the subchannel, so that water level Of course, water can always be taken regardless of the water intake, and obstacles such as debris accumulated at the water intake can be automatically removed by skillfully utilizing the flow velocity of the secondary waterway, so it can be used for various purposes including agricultural water. When used in water intake equipment for waterways, the structure is simple and the equipment construction and maintenance costs are low, and together with this, it will exhibit optimal practical effects.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing an example of a specific implementation structure of a water intake device according to the present invention, and FIG. 2 is a longitudinal sectional view taken along the line AA in FIG. 1. W1...Main waterway, W2...Sub-channel, w...Upstream waterway, w'...Downstream waterway, 1...Sluice gate, 1a...Gate, 2...Management bridge, 3...Water intake room, 4...Dust removal net, P...
River bed surface, 5...pump room, 6...submersible pump.

Claims (1)

[Claims] 1.Sluice gates are installed at important points in the main waterway, and the waterways on the upstream and downstream sides of the watergates are connected by a subchannel with a predetermined river bed slope, and the riverbed surface is dug down in the middle of the subchannel to create a box. A water intake chamber with a shape of
A water intake device characterized by having a pump room adjacent to one side of the water intake room.