JPH0257967B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a water intake device for collecting clean water from a reservoir water area such as a river or an irrigation canal.

[Prior Art] and [Problems to be Solved by the Invention] Conventionally, for example, clean water (superfluous water) was obtained from flowing water of a river.
As a water intake device for collecting water, the one shown in Fig. 6 is commonly used. In this device, a strainer 51 with an excessively large area is installed, which has the advantage of reducing the frequency of cleaning, but cleaning is still necessary, and the strainer 51 is heavy. However, since it is a conventional type, it has drawbacks such as the troublesome installation and removal of the water intake line. In FIG. 6, 52 is a pump for supplying clean water, 53 and 54 are a suction part and a discharge part of the pump, respectively, and 55 is a clean water suction pipe.

Therefore, the drawbacks of the device shown in Fig. 6 have been solved, and the seventh water intake device has been developed as a water intake device that does not require cleaning the strainer.
The one shown in the figure has been developed. With this device,
The strainer 61 is installed on land, and the strainer 6
1, a cylindrical overused porous element 63 is fixedly disposed within the casing 62, and as a cleaning member 64 for removing and discharging solid matter captured by the element from the element,
A rotary brush for scrubbing the inner circumferential surface of the element is provided.

In this water intake device, the discharge valve 65 (electric valve) is opened as necessary, and the motor 66 is started to rotate the rotating brush to discharge the captured solids as waste outside the strainer 61. Since the operation is an intermittent type, the operation is troublesome (if the discharge valve 65 is left open, the pump 52 sucks in air, resulting in a significant drop in water absorption efficiency);
It is difficult to perform the discharge operation and the water intake operation in parallel (simultaneously), and the discharge of garbage is carried out through pipes and discharge valves 65.
Since this method requires a large amount of water to be transported when discharging garbage, this requires extra power and there is a problem in that water intake efficiency cannot be increased. There was a problem with the complexity of incineration or other disposal. In addition, in FIG. 7, 67 is a garbage collection container, and 68 is a suction pipe for raw water (river water).

[Means for solving problems]

The present invention was made to solve the above-mentioned problems of conventional devices, and it takes in clean water from river water (etc.), traps solids in the river water with a porous element, and transfers the trapped solids to the element. It is constructed so that it can be disposed of directly into the river by rotating the cleaning member.

That is, the water intake device of the present invention is configured by connecting an automatic cleaning strainer placed under the water surface of a reservoir water area such as a river or irrigation canal to a pump placed at a suitable location, and the strainer is connected to a casing having an overflow outlet. A cylindrical porous element with one axial end as an inlet for raw water and the other end as an outlet for captured solids is fixedly disposed within the element, while a rotary shaft that can be rotated by a prime mover is installed in the element in the axial direction. is provided along the rotary shaft, and is rotatable along the inner circumferential surface of the element, and is capable of transferring solids in the element from the raw water inlet side to the captured solids outlet side by the rotation. Consisting of a cleaning member having the function of a screw conveyor,
The overwater outlet is connected to the suction port of the pump.

As shown in the example in Fig. 1, the strainer according to the present invention is installed in a reservoir water area such as a river or irrigation canal where water always flows in a fixed direction, with the raw water inlet facing upstream of the river, etc., and the captured solids outlet facing the upstream side of the river, etc. It is extremely preferable to provide it so as to face the downstream side. In this case, since the direction of water flow generally coincides with the horizontal direction, the element is arranged so that its center line faces in the horizontal direction.

The reason why the strainer should be arranged in this way is that in the element of the present invention, the opening at one end serves as the raw water inlet and the opening at the other end serves as the trapped solids outlet; By arranging the strainer, it is possible to maintain high raw water suction efficiency by the pump, and it is also possible to continue discharging captured solids by the cleaning member more accurately.

It is also preferable to arrange the raw water inlet so as to face upward in the vertical direction and the discharge port to face downward, which has the advantage of improving the effect of discharging the captured solids.

Although the strainer of the present invention is generally installed as a whole under water, the strainer is not limited to this, and it is sufficient that at least an element is located under the water. Otherwise, the pump will suck in air, which will significantly reduce its water absorption efficiency.
Moreover, this strainer can also be installed in a reservoir area where the direction of water flow is unstable or where there is almost no water flow.

The pump is not particularly limited, and it is convenient to use a land-based pump as shown in the example of FIG. 1, but a submerged type pump may also be used.

As is clear from the above description, it is preferable that the raw water inlet and the outlet are opened as far as possible. Therefore, the electric motor for rotating the cleaning member is
It is preferable to provide it at a position as far away from these openings as possible. In the example shown in FIG. 1, the submersible motor 8 is fixed to the casing 2 via a frame 9 provided behind the discharge port, and is located behind the discharge port, but it may be provided above the casing 2, By omitting the frame, the effect of discharging the trapped solids is significantly improved.

The starting and stopping of the prime mover may be synchronized with the pump for sucking raw water, or only the prime mover may be turned on and off independently. It is reasonable to automatically or manually start the prime mover by indirectly sensing the clogging condition or the amount of solids in the element.

The cleaning member is used to remove solid matter captured by the element, which is the strainer body, from the element, and to clean the inner surface of the element. Or, preferably, it should be configured to rotate and run while in contact with the inner circumferential surface. In the latter case, by forming a brush by providing a brush made of a soft material such as nylon at the tip, there is an advantage that an increase in the cleaning effect and avoidance of damage to the inner peripheral surface of the element can be achieved at the same time.
In the former case, a brush is not particularly necessary, and the entire cleaning member can be made of a metal material. Which of the above methods to adopt may be selected based on the shape, size, amount, adhesiveness, etc. of the solid matter entrained in the water, that is, the degree of necessity for cleaning the inner surface of the element.

In addition, the cleaning member is capable of cleaning substantially the entire inner circumferential surface of the element, and has a shape and size that does not prevent water (and accompanying solids) from flowing through the element even when the cleaning member is not rotating. It is important to make it a reality.

In the present invention, it is essential to use a cleaning member that can impart a flow propulsion force to the water and solids within the element by rotating in a predetermined direction. A screw conveyor type may be used. The shape of the screw blade may be the same as that shown in FIG. 1, and a ribbon type or a cut flight type in which the outer periphery of the screw is notched may also be used. The example in FIG. 5 also has substantially the same function as the screw conveyor.

[Example] An example of the present invention will be described based on the drawings. First, Figure 1 shows the entire water intake system, which includes a self-cleaning strainer 1 that is completely immersed in running water of a river, and a pump 4 that is installed on land.
1, clean water obtained by the strainer 1 is sucked by a pump 41 and is used for a predetermined purpose. In Fig. 1, 2 is a casing, 3 is an element, 4 is a cleaning member, 5 is a rotating shaft, 10 is a raw water inlet, 11 is an overwater outlet, 12 is a captured solids outlet, 42 is a suction part, and 43 is a discharge port. 44 is a suction pipe, and the strainer 1 uses a screw conveyor type scrubbing cleaning member 4 to remove and transport the substances caught by the element.
It is constructed so that it can be discharged.

Next, to explain the structure of the strainer 1 in detail, as shown in FIGS. 2 to 4,
A cylindrical body with an overwater outflow pipe 15 connected to the body, and end plates 13 and 14 provided at each axial end of this cylindrical body.
A casing 2 is formed. A relatively large-diameter circular opening is formed in the center of each of these end plates 13, 14, and these openings are opposed to each other.

Inside the casing 2, a cylindrical porous element 3 is fixedly disposed concentrically with the casing, spanning the two end plates.

Furthermore, a rotating shaft 5 is provided concentrically within this element 3, and a screw conveyor type cleaning member 4 is fixedly provided on this rotating shaft. The rotating shaft 5 is cylindrical and has a bearing 19 supported by a stay 17 formed of a cross-shaped plate provided in the central opening of the end plate 13, and a bearing 19 provided in the central opening of the end plate. It is supported by a bearing 20 supported by a snare 18 having the same shape and structure as the stay 17. The cleaning member 4 is constructed by forming screw blades 6 at equal pitches in the axial direction of the rotary shaft 5 with the same diameter and therefore the height of the top, and includes a key (not shown) and a stopper. It is fixed to the rotating shaft 5 by a screw 21 via a cylindrical boss 22, and at the top of the screw blade 6 is a brush (brush part) 4a that can scrub (scrub and clean) the inner circumferential surface of the element 3. It is attached.

Thus, the rotating shaft 5 is rotated and the cleaning member 4 is rotated.
The underwater motor 8 for operating the frame 9
It is fixed to the end plate 14 via.

Thus, the opening of the end plate 13 is the raw water inlet 1.
0, the openings in the end plates 14 form captured solids outlets 12, respectively, but the raw water inlets 10
A guard 7 having a coarse water passage opening is fixedly provided on the side so as to cover the raw water inlet 10 as required. Note that 16 in the figure is a flange.

Next, in the embodiment shown in FIG. 5, an inclined plate type cleaning member 4 is applied in place of the screw conveyor type cleaning member in the example shown in FIG. That is, the cleaning member 4 is composed of a flat plate-shaped base plate 31 and a brush 4a fixed to the base plate, and three of the cleaning members 4 are fixedly provided on the rotating shaft 5. - Attached via a nut 33, and furthermore, this mounting bracket is fixed to the rotating shaft 5 via a boss 34, and these cleaning members are spaced apart from each other by an angle of 120°, and are aligned with the axis of the rotating shaft 5. is arranged inclined at the same intersecting angle θ,
The tip of the brush 4a is in contact with the inner peripheral surface of the element 3.

In this case, the direction of inclination of the cleaning member 4 with respect to the rotating shaft 5 is such that when the rotating shaft 5 rotates, the water and solids in the element 3 can be captured and transferred toward the solids discharge port 12 side. It is essential to set it to something that can bestow power. In addition, the intersection angle θ
is set to a value that allows water and accompanying solids to flow as smoothly as possible, taking into account the magnitude of the flow driving force and the magnitude of flow resistance when raw water flows. It is important to take similar considerations when setting the length and width (diameter dimension of the element 3) of the substrate 31 and the mounting fittings 32. In addition, in FIG. 5, 35 is a key, and 36 is a set screw.

Next, the effects of the example shown in FIG. 1 will be explained.
When the pump 41 and motor 8 are started, raw water (river water) accompanied by solid matter flows into the element through the water passage opening of the guard 7 and the raw water inlet 10 of the element 3. At this time, solids having a relatively large particle size are once captured by the guard 7 and then flowed away behind the strainer 1 by the water flow, so they do not flow into the element.

The raw water that has flowed into the element 3 and is accompanied only by solids with a relatively small particle size is forcibly transferred toward the captured solids discharge port 12 by the rotation of the screw blade provided in the cleaning member 4. element 3
The water passes through the water hole and becomes clean water at the excess water outlet 1.
1. It is sucked in by the pump 41 through the suction pipe 44 and used for a predetermined purpose. During this time, some of the solids in the raw water are once captured by the element 3, but are removed by the brush 4a of the cleaning member 4, and the surface of the element is scrubbed by this brush. In this way, the captured and separated solids and other solids are subsequently transferred by the screw blades 6 and sent from the discharge port 12 to the element 3.
Expelled outside.

Therefore, by operating the pump 41 and motor 8 at the same time, water intake operation and element 3
The scrubbing of the filter surface and the transfer and discharge of solids can be carried out in parallel and continuously.

Note that the motor 8 can be operated intermittently depending on the degree of clogging of the water hole of the element 3 and the amount of solid matter staying in the element 3, so that even when the screw blade 6 is not rotating, the solid matter is removed from the screw blade 6. The outlet 1 is gradually guided by the water flow.
There is also the effect of being transported towards 2.

In this way, the solids in the raw water are discharged to the outside of the strainer 3 by the screw blades 6, but since the strainer 3 is placed below the water surface, the discharged solids are automatically disposed of into the river. . In other words, it has the effect of allowing foreign matter that has flowed into the element 3 from the river water to be disposed of directly into the river water.
There is an advantage that there is no need to process and dispose of captured foreign matter as in conventional devices.

Note that although the configuration of the cleaning member 4 in the example shown in FIG. 5 is different, its operation and effect are the same as in the example shown in FIG.

〔Effect of the invention〕

As described above, the water intake device of the present invention can take in clean water from rivers, etc., clean the raw water filtering element, and discharge captured solids in parallel, continuously, and automatically. The solids are forcibly transferred within the element by the rotation of a cleaning member for cleaning the inner circumferential surface of the element, and the captured solids discharge port does not have any pipes or valves and has a simple structure. It is possible to discharge solid matter accurately and stably, and the water intake operation can be continued with the discharge port always open (at this time, the water intake pump sucks air and increases the water absorption efficiency). Furthermore, it is possible to discharge waste intermittently as needed, and there is no need to flow water for discharge into the element when discharging waste. Water can be taken efficiently even when garbage is being discharged from the water, and the garbage can be automatically disposed of in water such as rivers, making the water intake operation extremely simple. If it is not rationalized, it can bring great benefits.

[Brief explanation of drawings]

Figures 1 to 4 are related to embodiments of the present invention; Figure 1 is a flow sheet of a water intake device showing a cross-sectional view of the strainer, and Figure 2 is an enlarged view of the strainer in Figure 1. 3 is a left side view of FIG. 2, and FIG. 4 is a right side view of FIG. 2. FIG. 5 is a front sectional view of a strainer in another embodiment. FIGS. 6 and 7 are flow sheets of different conventional examples. 1...Strainer, 2...Casing, 3...
Element, 4...Cleaning member, 4a...Brush,
5... Rotating shaft, 6... Screw blade, 7... Guard, 8... Motor, 9... Frame, 10...
Raw water inlet, 11... Super water outlet, 12... Captured solid matter outlet, 13, 14... End plate, 15...
Overwater outflow pipe, 16...flange, 17, 18...
...stay, 19,20...bearing, 21...set screw, 22...boss, 31...board, 32...mounting bracket, 33...bolt/nut, 34...boss,
35...Key, 36...Set screw, 41...Pump, 42...Suction part, 43...Discharge part, 44...
Suction piping, θ...intersection angle.

Claims (1)

[Claims] 1. A self-cleaning strainer installed under the water surface of a reservoir body such as a river or an irrigation canal, and a pump installed at an appropriate location are connected, and the strainer is installed in a casing having an overflow outlet. A cylindrical porous element with one end in the axial direction as a raw water inlet and the other end as a captured solids outlet is fixedly provided,
A rotating shaft that can be rotated by a prime mover is provided in the element along its axial direction, and the rotating shaft is rotatable along the inner circumferential surface of the element, and the solid matter in the element is transferred to the raw water flow by the rotation. A cleaning member having a function of a screw conveyor capable of transferring captured solids from the inlet side to the discharge port side is provided, and the overwater outlet is connected to the suction port of the pump. Water intake device. 2. Claim 1, wherein the cleaning member includes a brush that rubs the inner circumferential surface of the element.
Water intake device as described in section. 3. The water intake device according to claim 1 or 2, wherein the strainer is arranged with the center line of the element facing in the horizontal direction. 4. The water intake device according to claim 3, wherein the strainer is installed in a river, the raw water inlet is oriented toward the upstream side of the river, and the captured solid matter outlet is oriented downstream. 5. The water intake device according to any one of claims 1 to 4, wherein the strainer includes a water-permeable guard at the raw water inlet. 6. The prime mover includes, on the captured solids discharge port side,
The water intake device according to any one of claims 1 to 5, which is fixedly provided through the casing.