JPH10110452A - Culvert type intake device and its operation method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To remove a deposit in a culvert type intake device including a conduit, and to supply good quality water stably for a prolonged term by piping pipes to the inside and/or the outside of an intake section for the conduit and installing a backwash line supplying a Jet flow towards the intake section at the time of the washing operation of the conduit. SOLUTION: A conduit backwash line 12 is branched from a water-supply line 21 from the upstream spot of a water-supply line21-shaped valve V11, piped through the insides and/or the outsides of conduits 11 at specified spots, and projected from the conduits 11 from intake sections 11b and connected to a drainage line 19 or a water storage tank 15. When a valve V16 is closed at the time of backwash operation, a valve V15 is opened and water is flowed into a backwash line 12-1 and the valve V15 is closed suddenly, a high-speed flow is ejected as jet flows from perforated pipe sections 12a in response to the intake sections 11b of the conduits 11 in the backwash line 12. Accordingly, deposits in the conduits 11 and in a peripheral culvert section can be removed. Stable intake for a prolonged term is carried out without requiring a hand by periodically conducting the above-mentioned process.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has a high water intake efficiency over a long period of time by preventing clogging by backwashing, and enables stable water collection for a long period of time. The present invention relates to a culvert-type water intake device that can be automatically operated at a running cost and a method of operating the same.

[0002]

2. Description of the Related Art Conventionally, it is fairly common to take water from rivers, lakes, marshes, underground water, wells and the like by culverts and use it for industrial water, tap water, agricultural water and the like. In this case, in the water conduit which takes in water by a culvert type, (1) a mesh pipe in which braids are welded to contacts, (2) a mesh pipe in which a ring and a wire are orthogonal to each other or a cross point is further welded, and (3) a steel pipe (4) A screen tube in which rods having a wedge-shaped cross section are arranged in a circle in the axial direction, (5) A tube in which a wire mesh is wound around a slit tube, or (6) A combination tube thereof Aqueducts with a strong structure and no clogging have been developed and used.

However, in the above-mentioned river water, lakes and marshes, clogging is inevitably short-term due to accumulation of various factors such as the occurrence of corrosive substances such as clayey soil, pebbles and leaves, and the occurrence of mosses and spiders. Occur within. Once clogging occurs, water intake is drastically reduced or disabled, and the only way to recover it is by manual repair and cleaning. For this reason, we are working to eliminate these factors as preliminarily as possible, but we are still unable to resolve them.
As a result, water intake efficiency has decreased in a short period of time, or water quality has deteriorated. In order to compensate for this, the initial design is to increase the size of the equipment, or a large-scale cleaning for removing accumulated soil and corrosive substances is performed in a relatively short cycle using a bulldozer or the like. For this reason, physical or human costs are inevitably increased due to an increase in the size of the apparatus and an increase in the number of times of repair and cleaning.

[0004] When the water quality is degraded, in the subsequent water purification process, additional work such as enlargement of filtration and precipitation equipment, large-scale use of chemicals for filtration and precipitation, increase in cost, and increase in chemicals are required. At present, there are problems such as pollution caused by air pollution.

[0005] In particular, the water quality of rivers, lakes and marshes also fluctuates significantly due to weather fluctuations, such as when a typhoon strikes or when a drought occurs, or mosses or mosses occur in large quantities due to eutrophication. In such a case, the amount of soil, corrosives, mosses and sediments around the headrace pipe increases significantly. Then, the water intake efficiency will be reduced at a stretch, and if you are obliged to supply water stably for a long time, you will immediately face difficulties.

[0006]

SUMMARY OF THE INVENTION The inventor of the present invention has found that soil, corrosives, moss and moss due to the above-mentioned period of use during a steady or fluctuating period of use can be taken from the water pipe itself or the entire underdrain structure including the water pipe. If sediments of the peach type can be removed regularly or as needed, even if water is withdrawn under adverse conditions, it will be possible to obtain high-quality water with a long-term stability. Also, the research was carried out with the idea that developing an apparatus capable of performing sediment in a simple manner would provide an inexpensive and simple facility. As a result, sediment is removed from the water conduit or culvert including the water conduit by a simple, efficient, inexpensive and automatic backwashing method that does not require manual repair or cleaning, and restores its original function. As a result, a culvert-type water intake device capable of stably supplying high-quality water for a long time and supplying water thereto, and a method of operating the same have been developed, and have reached the present invention.

[0007]

According to a first aspect of the present invention, a base is connected to a water storage tank, and a base is connected to at least one underdrain type water pipe which serves as a water intake from a water intake source. At least one water supply line having a pump for supplying water from the water storage tank to a predetermined water supply facility, and piping is provided inside and / or outside at least a water intake portion of the water pipe,
There is provided an underdrain type water intake device including a backwash line for continuously or intermittently supplying a jet stream toward the water intake portion during a cleaning operation of the water pipe. Here, it is preferable that a base end of the backwash line is connected to the water supply line on a downstream side of a pump of the water supply line, and an end of the backwash line is connected to a drainage line or the water storage tank. Furthermore, the water intake device of the present invention collects water from the water intake section of the water guide pipe toward the water storage tank during normal operation and activates the water supply line, and periodically performs the backwash line during the water pipe wash operation. Optimally, it further comprises control means which are activated automatically or manually when required.

[0008] According to a second aspect of the present invention, at least one underdrain type water pipe having a base end connected to a water storage tank and a terminal end serving as a water intake from a water intake source, and a predetermined distance from the water storage tank. At least one water supply line having a pump for supplying water to the water supply equipment, and piping inside and / or outside of at least the water intake part of the water conduit, and air bubbles are directed toward at least the water intake part during a cleaning operation of the water conduit. A backwash line for continuously or intermittently supplying a jet stream containing and / or a cleaning aid, and installed on the backwash line,
There is provided a culvert-type water intake device comprising: a mixing unit that mixes bubbles and / or a cleaning aid into the backwash line during a cleaning operation of the water pipe. Here, it is preferable that a base end of the backwash line is connected to the water supply line on a downstream side of a pump of the water supply line, and an end of the backwash line is connected to a drainage line or the water storage tank. Further, the water intake device of the present invention collects water from the water intake section of the water pipe toward the water storage tank during normal operation and activates the water supply line, and performs the backwash line including the mixing unit during the water pipe cleaning operation. Optimally, it further comprises control means which are activated automatically or manually on demand or on demand. Further, the mixing unit may be an ejector.

In the present invention, when operating either the water intake device according to the first aspect or the water intake device according to the second aspect, during steady operation, water is taken from a water intake source to a water storage tank via a water pipe. A culvert-type water intake system that operates to supply water from a water storage tank to a predetermined water supply facility via a water supply line, and operates to operate a backwash line or a backwash line including a mixing unit during the washing operation of the water pipe. The driving method is provided. Here, in the washing operation of the water pipe, it is preferable to operate the backwash line so as to wash the backwash line from the upstream side to the downstream side of the water source, and in the washing operation of the water pipe, The backwash line or the backwash line including the mixing unit is preferably operated so as to generate a pulsating flow. Also,
It is preferable that the backwash line and the mixing unit are operated intermittently during the washing operation of the water pipe.

[0010]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a culvert-type water intake apparatus according to the present invention; The present invention is not limited to the following description, and various changes can be made within the scope of the present invention.

A culvert type water intake device 10 according to a first embodiment of the present invention.
Is provided with at least one water pipe 11 buried underwater or in sand and gravel, and a number of water pipe backwash lines 12 corresponding to the water pipe. Although the example shown in FIG. 1 has two water pipes and two backwash lines, the water intake device may have one or three or more water pipes and backwash lines. May be selected according to the size and design of the device. Similarly, FIG. 3 shows a configuration example in which a water conveyance pipe is buried in a well.

The water pipe 11 is suspended or supported in a water source 13 or buried in a well 14 provided in the water source 13. FIG. 2 shows an example of a cross-sectional view taken along line II-II of FIG. 1, showing a concrete frame well 1 provided in an intake source 13.
4, two water pipes 11 (1) orthogonal to the flow direction A of water.
1-1, 11-2) It was buried. The well 14 is filled with sand and gravels, and performs primary filtration of water. At this time, clayey soil in the water, corrosives such as foliage, mosses and other waterborne substances are filtered and formed as sediment in the gravel layer, and the water from which these waterborne substances are collected is filtered. Is taken from the water intake section of the water pipe 11. Water pipe 11
When the water is suspended in the water in the water source 13, it is preferable to provide a means (not shown) for filtering the above-mentioned suspended matter in the water around the water pipe 11 so as to correspond to the above-mentioned gravel layer. Good.

The water intake source may be any river, lake, underground water, etc., but at the place where the water pipe is installed, it is preferable to create the flow of water for the sake of backwashing described later. There is no limitation on the arrangement direction of the water guide pipe with respect to the flow direction of the water from the water intake source, but it is preferable to arrange the water guide pipe orthogonally to the flow direction of the water in order to effectively perform backwashing.

As shown in FIGS. 1 and 2, the water pipe 11 has a proximal end 11a connected to a water storage tank 15, and a distal end 11b suspended from the water of the water intake source 13 as a water intake portion or connected to the water intake source 13. The pipe is installed so as to be buried in the well 14 provided. The water from the water intake source 13 is introduced into the water storage tank 15 from the water intake part 11b of the water guide pipe 11 by a gravity difference or a pump (not shown).

In the example shown in FIG. 1 and FIG.
Also, two backwash lines 12 are provided, respectively, but these may be one or three or more, and may be changed according to the capacity, scale, design, etc. of the water intake device.

As the water intake section 11b of the water pipe 11, any perforated pipe may be used as long as it is durable without being unduly clogged with sand or pebbles. Illustrative perforated pipes (1) to (6) conventionally used at the beginning of this specification can also be used. (1) Mesh pipe with braided and welded contacts (2) Mesh pipe with rings and wires orthogonal to each other or welded at intersections (3) Slit pipe with many slits formed in steel pipe etc. (4) Wedge-shaped cross section (5) Slit tube wrapped with wire mesh (6) Combined tube of these

The water intake 11b of the water pipe 11 is a perforated pipe. FIG. 3 shows an example. The opening state of the perforated pipe of the water intake section 11b is arbitrary, but it is preferable that the total opening area gradually or stepwise increase from the base end to the end of the water intake section 11b. In the example shown in FIG. 3, a large number of small-diameter holes 16 (small total opening area) at the base end, a large number of medium-diameter holes 17 (middle of the total opening area) toward the center, and a large number of large-diameter holes toward the terminal end. 18 (large total opening area).

The reason for this opening condition is that, during the backwashing operation, the high-pressure jet stream (jet stream) spouting from the backwash line uniformly increases the washing capacity over the entire water intake section 11b of the water pipe 11. It is to have. The opening state need not be a hole shape as shown in FIG. 3, but may be a slit or any other shape. In short, the opening area is gradually increased from the base end to the end of the water intake part 11b so that the washing is as uniform as possible. Preferably, a jet is obtained. The shape of the water guide pipe is arbitrary such as a straight pipe, a curved pipe, a V-shaped pipe, a U-shaped pipe, and an annular pipe.

Next, the water storage tank and the water supply line will be described. The water storage tank 15 is a tank for temporarily storing the water from the water pipe 11 and serves as a sedimentation tank because the water introduced from the water guide part 11b contains some sand, soil, corrosive substances, and the like.

In the example shown in FIG.
Although 1 and 22 are provided, the number may be provided as needed. Since the water supply lines 21 and 22 are the same, only one of them will be described.
b, the end of which is inserted into the water reservoir 15 and each branch pipe 21
Pumps P1 and P2 are installed on a and 21b, respectively. The branch pipe 21a and the branch pipe 21b are connected by a bypass pipe 21c on the downstream side of the pump P1 and on the upstream side of the pump P2. Then, in order to perform a steady and cleaning operation described in detail later,
Valves V1 and V2 are provided on a, valves V3 and V4 are provided on the branch pipe 21b, and a valve V5 is provided on the bypass pipe 21c. Further, the water supply line 21 has a valve V11 downstream of the junction of the two branch pipes 21a and 21b. The water supply line 22 is similar to the water supply line 21.

In the example shown in FIG. 1, the water pipe 11 is connected to a drain line 19 for draining when necessary, and valves V16 and V17 are provided on both sides of the connection point. Also in the drain line 19, valves V18 and V19 are provided.

Although not shown, the water supply lines 21 and 22 are connected to the next water treatment step (water supply equipment). This water is used for all purposes such as industrial water, tap water, agricultural water, pure water, etc., and the water treatment process varies depending on the final use. The example of the water treatment process after a water supply line is shown. These steps are performed in combination. (1) Precipitation, filtration (sand, ceramic, etc.) (2) Sterilization (ultraviolet rays, ozone, chlorine, etc.) (3) Ultrafiltration, membrane filtration, etc. (4) Ion exchange (ion removal, ion implantation)

Next, the water pipe backwash line 12 will be described. As shown in FIG. 1, the water pipe backwash line 12
Branched from the water supply line 21 from a point upstream of the valve V11 on the water supply line 21, and piped through the inside and / or outside of the water conduit 11 at a predetermined point, and a water intake part 11b
Out of the water pipe 11 from the drainage line 19 or the water tank 1
5 is connected. On the backwash line 12, a valve 15 is provided downstream of the water intake section 11b of the water guide pipe 11 for a backwash operation described in detail later.

The backwashing line has a perforated pipe 12a (12) at least in a portion corresponding to the water intake section 11b of the water pipe 11.
-1a, 12-2a). Further, a part or the whole arranged inside and / or outside of the water guide pipe 11 may be a perforated pipe 12a. During the cleaning operation, a jet (jet stream) is jetted from the perforated pipe portion 12a to clean the water pipe itself and the vicinity of the water intake portion of the water pipe. The shape of the holes in the perforated pipe, the distribution of the holes on the pipe, the opening area, and the like are determined by the quality of the jet to be applied to the water conveyance pipe so that desired washing can be performed. In addition, the backwash line 12 has two systems 12-1 and 12-2, but both are the same, so that they have been comprehensively described.

The backwash line does not necessarily need to be connected to the water supply line as shown in FIG. 1 and can be provided independently. However, it is convenient and economical to use the backwash liquid used in the backwash line and the pump for driving the backwash liquid with the water supply line. If there are other available facilities such as a backwash liquid and a pump, they may be used. That is, both the base end and the end of the backwash line may be connected to appropriate positions, and the end may be open. What is necessary is just to be able to supply a jet stream for backwashing at least to the location where the water intake section is located inside and outside the water pipe.

The present invention also provides a culvert-type water intake device according to a second aspect. The culvert-type water intake device of the second embodiment is the same as the water intake device of the first embodiment described in detail above, except that the mixing unit 25 and the mixing unit 25 are provided on the backwash line 12 (12-1, 12-2).
26 is provided. Therefore, in the water intake device of the second aspect, the mixing unit will be described, and the first unit will be described.
The description of the same parts as those of the embodiment is omitted.

The mixing units 25 and 26 are not necessarily provided in all backwash lines, but may be provided as necessary. The mixing unit is provided for mixing bubbles and / or a cleaning aid into the backwash line during the cleaning operation of the water pipe to promote the cleaning. The medium to be mixed may be any as long as it is useful for washing, but as a result of experiments, it has been found that high-pressure gas is particularly preferable because high-pressure air is simple, inexpensive, and simple. The pressure is determined according to the scale of the water intake device to be washed, the degree of contamination of the water intake source, and the like. In addition, cleaning aids such as steam, hot water, and detergents are also effective, and fine particles such as sand are also effective as cleaning aids.

The combination of bubbles and / or cleaning aids mixed in the mixing unit is determined according to the environment and purpose of the water intake device. Generally, bubbles of high-pressure air are explosively released into water and blow off sediments, so that the bubbles alone exert a sufficient performance. However, when sand or a detergent is added, washing is more efficiently performed. The mixing unit may mix only one medium to be mixed, or may be provided on the same or individually multiple backwash lines depending on the number of mediums to be mixed. At the time of backwashing, part of the sand for filtration in the culvert is lost due to runoff, but if sand is supplied by the mixing unit, not only washing but also replenishment of filtered sand in the well can be performed. It is a great merit that the complicated sand supply work that has been performed can be automatically and mechanically performed. When the amount of sand replenishment becomes large, it is appropriate to use a large-scale commercially available line such as a sand pump or a pipe line having a spiral conveying means for the backwash line, but it is necessary to discharge the sand into the sand bed. Requires a pressure to form a jet stream as in the present invention.

An example of the mixing unit 25 (26) is shown in FIGS. The mixing unit 25 has a backwash liquid inlet 27.
And a tubular body 29 having a backwash liquid outlet 28, and further having a supply means 30 for air and / or a cleaning aid (referred to as a supply). The supply material is supplied from the supply means 30 through the supply port 31 and further into an annular passage 32 formed in the tubular body 29.
And the backwashing liquid is supplied in the y direction in the x direction flowing through the tubular body 29 via the nozzle 33. The shape and number of the nozzles are determined according to the properties of the material to be supplied.

The tubular body 29 of the mixing unit 25 has a large diameter portion 2
It is preferable to have an ejector composed of 9a, a transition portion 29b, and a small diameter portion 29c. As a result, the backwashing liquid flowing in the x direction can be pressurized and accelerated, thereby increasing the backwashing ability. The location of the mixing unit
The jet stream may be on the backwash line, near the water intake section 11b, or in any case as long as it can supply the jet stream to the water intake section 11b.

FIG. 6 is a diagrammatic and partially sectional view of another example of the structure of the underdrain type water intake device of the present invention. The sedimentation tank 15 is composed of first and second sedimentation tanks 15a and 15b.
Filtration of soil and corrosives that may be mixed in from soil.

Next, a method of operating the underdrain type water intake device according to the first and second aspects of the present invention will be described. The steady and backwash operation described below may be performed automatically by sequence control, or may be performed manually by adding a manual element. Most preferably, these controls are performed by a suitable controller such as a computer. At the time of steady operation in both modes, that is, at the time of water intake from the water intake source, the valve V1
6, V17 is opened, V19 is closed, and the water is supplied from the water intake source 13 such as river water to the water pipe 1 through facilities such as a well 14.
The water is introduced from the first water intake section 11b and stored in the water storage tank 15. The water in the water storage tank 15 is supplied to the branch pipe 2 with the valves V1 and V2 opened.
Water is supplied from the water supply line 21 with the valve 1a and the valves V3 and V4 opened to the predetermined water supply facility from the water supply line 21 with the valve V11 opened by the operation of the pumps P1 and P2. At this time, the valve V5 is closed and the bypass line 21c is not used. The same applies to the water supply line 22.
At this time, the valves are closed so that the backwash lines 12-1 and 12-2 do not operate.

After the operation for a certain period of time, or when it is considered that contamination by soil or corrosive substances such as wells and water pipes has progressed, the backwashing operation is automatically or manually performed.
The backwash line 12-1 will be described. The other is similar. During the backwash operation, the valves V2, V3 are closed, the valves V1, V5, V4 are open, the valve V11 is closed, and the water in the water storage tank 15 is V1, P1, V5, P2.
Preferably, it operates to flow into the backwash line 12-1 via V4. At this time, the valve V16 is closed and V
15 is opened. As a result, the water can obtain a driving force of both the pumps P1 and P2 to form a high-pressure and high-speed flow, thereby increasing the cleaning ability. The same applies to the backwash line 12-2. When the backwash line is connected to another system, preferably the pressurized water is immediately supplied to the backwash line.

In this state, after the backwashing liquid is allowed to flow through the backwashing line 12-1 for a while, the valve V15 is suddenly closed. At this time, it is better to close V16 on the water pipe 11-1. Then, the high-speed flow of the pressurized cleaning liquid is disposed inside and / or outside of the water pipe corresponding to at least the water intake portion 11b of the water pipe 11 in the backwash line due to the water hammer effect due to sudden closure of the valve V15. The jet flow is jetted from the perforated pipe portion 12a as a jet flow, and this jet flow is jetted out at least along the water intake portion 11b of the water guide pipe 11 into and / or outside the water intake portion as a jet flow to remove sand in the well. Fluidize the bed. By this jet flow, not only the water intake section 11b of the water pipe but also the surrounding area, for example, clay soil adhered and deposited on the gravel in the well, corrosive substances such as leaves of trees, and moss and spikes generated during operation are blown off. If there is a water flow A at the water intake source, these blown-off soil and corrosives are washed off downstream by the water flow A, and the water pipe itself and its surroundings are cleaned.

If the perforated pipe portion 12a of the backwash line is longer than the water intake section 11b of the water guide pipe 11, the inside of the water guide pipe 11 can be washed during the backwash. Therefore, it is not necessary to repair the water pipe for a long time.

At the time of the backwashing operation, it is preferable that the soil and corrosives blown off by the backwashing jet flow be more efficiently put on the water flow A as described above. For this purpose, the water guide pipes 11-1 and 11-2 are arranged so as to be orthogonal to the flow A of water, and the upstream backwash line 12-1 and then the backwash line 12-2 are controlled to operate. I do.

In the backwashing operation, it is preferable to efficiently blow off the soil and corrosives deposited by the backwash jet as described above. For this purpose, it is preferable to generate a pulsation in the flow of the cleaning liquid in the backwash line.
The pulsation is controlled so that the pumps P1 and P2 or the mixing unit 25 and the like are intermittently operated.

Since the operation mode of the water intake device of the second embodiment is the same as that of the water intake device of the first embodiment described above except for the operation of the mixing unit, only the relevant operation of this mixing unit will be described. The mixing unit is operated during the backwash operation of the water intake device of the second aspect. What is added to the pressurized high-speed flow in the backwashing line by the mixing unit is air (bubbles) and / or a cleaning aid as described above, and these can be used alone or in combination with the pressurized high-speed flow (jet). By adding to (flow), a remarkable cleaning effect is exhibited as compared with the case where it is not added.

When pressurized air is added to the jet stream, in addition to the jet of water in a pressurized state, a jet of pressurized air (bubbles) explosively occurs from the water intake section 11b, and the force (force) of the jet stream And the cleaning capacity is greatly increased.

When fine particles such as sand are added to the jet stream,
It is in a washing state as if it were sandblasted, and moss and spiders can be polished and cleaned up to the inner surface of the water pipe, and soil, corrosive substances and wells accumulated on the outside gravel are generated inside the well Moss and mosses can be more completely removed. Further, even if the sand put in the well for filtration becomes insufficient, the sand can be automatically replenished, and the complicated work conventionally required by manual labor can be omitted. When replenishing a large amount of sand, it is preferable to provide a separate mixing unit.

As described above, when pulsation is to be generated in the jet flow, it is preferable to control the mixing unit to operate intermittently.

[0042]

According to the culvert-type water intake device of the present invention, the backwash line is disposed inside and / or outside of the water pipe itself, so that soil can be added to the water pipe itself or the surrounding culvert part over a long period of use. Even if corrosive substances are accumulated or mosses or mosses are generated, they can be removed from the water pipe itself and its surroundings in a timely manner by backwashing, and manual cleaning and repair can be minimized.

Further, since a mixing unit capable of appropriately mixing air and a cleaning aid is provided in the backwashing line, the cleaning capacity is further enhanced, and a long-term automatic operation is possible.

The apparatus of the present invention has a simple structure and requires a minimum of human labor, so that equipment costs and running costs are low, and most importantly, high-quality water can be supplied stably over a long period of time. It is.

[Brief description of the drawings]

FIG. 1 is a schematic partial perspective view of a culvert type water intake device according to first and second aspects of the present invention.

FIG. 2 is a sectional view taken along the line II-II of FIG. 1 and showing an example of a configuration in which the water intake device of the present invention is buried in a well.

FIG. 3 is a perspective view for explaining a distal end portion of a water guide pipe, particularly a water intake section.

FIG. 4 is a longitudinal sectional view of a mixing unit provided in a backwash line of the water intake device of the present invention.

FIG. 5 is a cross-sectional view of the mixing unit taken along line VV in FIG.

FIG. 6 is a schematic partial side view of a configuration example of a water intake device of the present invention.

[Explanation of symbols]

 Reference Signs List 10 water intake device of first embodiment of the present invention 11 water guide pipe 11a base end 11b end (water intake section) 12 water guide pipe backwash line 12a perforated pipe part 13 water intake source 14 well 15 water storage tank 16 small diameter hole 17 medium diameter hole 18 large Diameter hole 19 Drain line 21, 22 Water supply line 21a, 22a, 21b, 22b Branch pipe 21c, 22c Bypass pipe P pump V valve 25, 26 Mixing unit 27 Backwash liquid inlet 28 Backwash liquid outlet 29 Tubular body 29a Large Diameter part 29b Transition part 29c Small diameter part 30 Air and / or cleaning aid supply means 31 Air and / or cleaning aid supply port 32 Annular passage 33 Nozzle

Claims (14)

[Claims] 1. A base end is connected to a water storage tank, and a terminal end is at least one underdrain type water pipe serving as a water intake section from a water intake source, and a pump for supplying water from the water storage tank to a predetermined water supply facility. At least one water supply line having: a pipe installed inside and / or outside of at least a water intake section of the water pipe, and continuously or intermittently jetting a jet stream toward at least the water intake section during a cleaning operation of the water pipe. A culvert type water intake device comprising a backwash line for supplying. 2. The underdrain type water intake device according to claim 1, wherein a base end of the backwash line is connected to the water supply line downstream of a pump of the water supply line. 3. The underdrain type water intake device according to claim 1, wherein an end of the backwash line is connected to a drain line or the water storage tank. 4. During normal operation, water is collected from a water intake section of the water pipe toward the water storage tank, and the water supply line is operated. During the water pipe cleaning operation, the backwash line is automatically or periodically operated when necessary. The underdrain type water intake device according to any one of claims 1 to 3, further comprising a control means which is operated manually or manually. 5. A water supply tank having a base end connected to at least one underdrain type water pipe serving as a water intake section from a water intake source, and a pump for supplying water from the water storage tank to a predetermined water supply facility. At least one water supply line having at least one of a water supply line, which is disposed inside and / or outside of at least the water intake part of the water conduit, and which is supplied with air bubbles and / or a cleaning aid toward at least the water intake part during a cleaning operation of the water conduit. A backwash line for continuously or intermittently supplying the jet stream of the above, and a mixing unit installed on the backwash line and mixing bubbles and / or a cleaning aid into the backwash line during a washing operation of the water pipe. A culvert-type water intake device comprising: 6. The underdrain type water intake device according to claim 5, wherein a base end of the backwash line is connected to the water supply line downstream of a pump of the water supply line. 7. The underdrain type water intake device according to claim 5, wherein an end of the backwash line is connected to a drain line or the water storage tank. 8. During normal operation, water is collected from a water intake section of the water pipe toward the water storage tank and the water supply line is operated. During the water pipe cleaning operation, the backwash line including the mixing unit is periodically cleaned. Or further comprising control means for automatically or manually operating when required.
A culvert-type water intake device according to any one of claims 7 to 10. 9. The air bubbles according to claim 5, wherein said air bubbles are pressurized air bubbles.
A culvert-type intake device according to any one of the above. 10. The underdrain type water intake device according to claim 5, wherein the mixing unit is an ejector. 11. When the water intake device according to any one of claims 1 to 4 or the water intake device according to any one of claims 5 to 10 is operated, during a steady operation, the water is supplied from a water intake source via a water pipe. It operates to take water into the water storage tank and supply water from the water storage tank to the specified water supply equipment via the water supply line, and to operate the backwash line or the backwash line including the mixing unit during the washing operation of the water pipe. A method of operating a culvert-type water intake device, comprising: 12. The underdrain type water intake device according to claim 11, wherein the backwash line is operated so as to wash the backwash line from an upstream side to a downstream side of a water source during a washing operation of the water pipe. Driving method. 13. The method of operating a culvert-type water intake device according to claim 11, wherein the washing operation of the water pipe is performed so as to generate a pulsating flow in the backwash line or the backwash line including the mixing unit. 14. A method according to claim 11, wherein the backwash line and the mixing unit operate intermittently during the washing operation of the water pipe.