JPH10110453A - 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 installing backwash lines supplying jet flows to the inside and/or the outside of an intake section for a conduit and a peripheral section separated from the conduit at a specified distance. SOLUTION: When water in a water storage tank 15 is drawn into a conduit backwash line 12 piped to the inside and/or the outside of an intake section 11b for a conduit 11 under the state, in which a valve V16 is closed and a valve V15 is opened, and the valve V15 is closed suddenly, a jet flow is ejected from the perforated pipe section 12a of the conduit 11, and deposits on the inside are removed. When water in the water storage tank 15 is flowed continuously by opening valves V41a, V41b, V42a, V42b, V43a, V43b in a conduit peripheral backwash line 40 arranged to a periphery separated from the conduit 11 at a specified distance and branch pipes 41, 42, 43 and the valves V41b, V42b, V43b are closed suddenly, on the other hand, jet flows are ejected from perforated pipes 41a, 42a, 43a, and deposits in the peripheral section of the conduit 11 are taked off. Accordingly, water can be taken in and supplied stably.

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,
A water pipe backwash line for continuously or intermittently supplying a jet stream to at least the water intake section during a water pipe cleaning operation, and a water pipe disposed at a predetermined distance from the water pipe and around the water pipe during the cleaning operation There is provided a culvert-type water intake device, comprising: a backflow line around a water pipe for continuously or intermittently supplying a jet stream for cleaning a peripheral portion. Here, the base end of the water pipe backwash line is connected to the water supply line on the downstream side of the water supply line pump, and the terminal end of the water pipe backwash line is connected to the drainage line or the water storage tank. Is preferred. In addition, the base end of the water pipe peripheral backwash line is connected to the water supply line downstream of the water supply line pump, and the terminal end of the water pipe peripheral backwash line is connected to the drain line or the water storage tank. Is preferred. 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 water feed pipe backwash line for continuously or intermittently supplying a jet flow of feed water and / or a cleaning aid, and a water feed pipe disposed at a predetermined distance from the water feed pipe and surrounding the water feed pipe during a cleaning operation. A backwash line around a water pipe which continuously or intermittently supplies a jet stream containing air bubbles to be washed and / or a cleaning aid, and a water pipe backwash line which is installed on the backwash line during the cleaning operation. Underdrain type intake apparatus, characterized in that it comprises a mixing unit for mixing the air bubbles and / or cleaning aids on at least one spare water conduit near backwash line is provided. Here, the base end of the water pipe backwash line is connected to the water supply line on the downstream side of the water supply line pump, and the terminal end of the water pipe backwash line is connected to the drainage line or the water storage tank. Is preferred. The base end of the water pipe peripheral backwash line is connected to the water supply line downstream of the pump of the water supply line, and the terminal end of the water pipe peripheral backwash line is connected to the drainage line or the water storage tank. Is preferred. 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. The control means, during the cleaning operation, may be configured to selectively operate the air bubble mixing unit and the cleaning agent mixing unit, and further include means for selecting and operating a cleaning agent, wherein the air bubbles are pressurized air bubbles. The cleaning aid is sand,
It is preferably at least one selected from a detergent, hot water, and steam. 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, the water is collected from a water intake source into a water storage tank via a water pipe. Operation of a culvert type water intake device that operates to supply water to a predetermined water supply facility through a water supply line, and to operate a water pipe backwash line and / or a water pipe peripheral backwash line during a washing operation. It provides a method. Here, during the washing operation, the water pipe backwash line sequentially operates from the upstream side to the downstream side of the water intake source, and the water pipe peripheral backwash line operates from the upstream side to the downstream side of the water intake source. First, the water pipe backwash line is operated, then the water pipe peripheral backwash line is operated, and the water pipe backwash line and / or the water pipe peripheral backwash line are operated to generate a pulsating flow. Preferably, the washing line and / or the backwash line around the water pipe and the mixing unit are operated intermittently.

[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 one water pipe and one water pipe backwash line, the water intake device may have one or more water conduits and one or more backwash lines. What is necessary is just to select according to a scale and a design. Fig. 3 shows an example of a configuration in which a water pipe is buried in a well.
Shown in

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, a single water pipe 11 is buried perpendicular to the flow direction A of water. 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. When the water pipe 11 is suspended and supported in the water in the water source 13, a means (not shown) for filtering the above-mentioned suspended matter in the water is provided around the water pipe 11 so as to correspond to the above-mentioned gravel layer. Good to put.

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.
In addition, each of the water pipe backwash lines 12 is provided one by one, but these may be two or more, and may be changed according to the capacity, scale, design, and the like 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 such an opening condition is that during the backwashing operation, a high-pressure jet stream (jet stream) spouting from the water pipe backwash line is evenly washed over the water intake section 11b of the water pipe 11. In order to have the ability. 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 and the water pipe peripheral backwash line 40 will be described. As shown in FIG. 1, the water pipe backwash line 12 branches from the water supply line 21 at a point upstream of the valve V11 on the water supply line 21,
At a predetermined point, it is piped through the inside and / or outside of the water pipe 11, exits the water pipe 11 from the water intake part 11 b, and is connected to the drain line 19 or the water storage tank 15. A valve 15 is provided on the water pipe backwash line 12 on the downstream side of the water intake section 11b of the water pipe 11 for a backwash operation described in detail later.

The water pipe backwash line has at least the water pipe 11.
In a portion corresponding to the water intake section 11b, a perforated pipe 12a
Must be. Further, a part or the whole arranged inside and / or outside of the water guide pipe 11 may be a perforated pipe 12a. This perforated tube section 12
From a, a jet flow (jet flow) is jetted during the cleaning operation 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.

The backwash line 40 around the water pipe is used to completely clean the inside of the well 14 and the entire area around the water pipe by using only the water pipe backwash line 12, and to restore the capacity of the well, that is, to recover the water intake rate. It is provided. Therefore,
The number of water pipe backwash lines 12 installed, the number of water pipe peripheral backwash lines 40, and the location of each of these backwash lines are arbitrarily determined according to the conditions and design of the installation location.

FIGS. 1 and 2 show an example of the configuration of the backwash line 40 around the water pipe. As shown in FIG. 1, the backwash line 40 around the water supply pipe is connected to the valve V12 on the water supply line 22.
From the water supply line 22 at the upstream point of the well 14, as shown in FIG.
It is arranged above the water intake part 11b of the water pipe 11 in a state of being branched into a book, and the terminal is located at the drain line 19 or the water tank 1
5 is connected.

As shown in FIG. 1, the three branch pipes 41, 42, 43 of the backwash line 40 around the water pipe are connected to the water pipe 1 as shown in FIG.
As in the configuration of the backwash line 1 and the backwash line, a double tube structure may be used, but a single tube is preferable. In any case, the perforated pipes 41a, 42a, 43a are provided at the portions where the branch pipes 41, 42, 43 are arranged in the well 14.
Must be. This is because a jet for backwashing is jetted from the perforated pipe portion. The shape of the holes in the perforated tube, the distribution of the holes on the tube, the opening area, and the like are determined so as to provide a jet (jet flow) for performing desired washing.

The branch pipe 41 of the backwash line 40 around the water pipe,
Valves V41a and V41 are provided on the upstream and downstream sides of the perforated pipes 41a, 42a and 43a, respectively, for controlling a cleaning operation described later in detail.
b, valves 42a and V42b, and valves V43a and V43b.

The two backwash lines need not necessarily be connected to the water supply line as shown in FIG. 1 and may be provided independently. However, it is convenient and economical to use the backwash liquid used in both backwash lines and a 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 both backwash lines may be connected to appropriate positions, and the end may be open. All that is required is that the jet flow for backwashing can be supplied to at least the location where the water intake portion is located inside and outside the water pipe or into the well where the water pipe is arranged.

The present invention also provides a culvert-type water intake device according to a second aspect. The underdrain type water intake device according to the second aspect is the same as the water intake device according to the first aspect described in detail above, except that mixing units 25 and 26 are provided on the water pipe backwash line 12 and the water pipe peripheral backwash line 40, respectively. Things. Therefore, in the water intake device of the second embodiment, this mixing unit will be described, and description of the same parts as those of the first embodiment will be 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 air 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.

FIGS. 4 and 5 show an example of the mixing unit 25 (26). 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 partial cross-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 and 40 do not operate.

After the operation for a certain period of time, or when it is considered that the contamination by the soil or corrosive substances such as wells and water pipes has progressed, the backwashing operation is automatically or manually performed.
First, the water pipe backwash line 12 will be described. During the backwash operation, the valves V2 and V3 are closed and the valves V1 and V3 are closed.
When V5 and V4 are open, the valve V11 is closed, and the water in the water storage tank 15 is preferably operated so as to flow into the headwater backwash line 12 via V1, P1, V5, P2 and V4. At this time, the valve V16 is closed and the valve V15 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.
When the headstock backwash line is connected to another system, preferably pressurized water is immediately supplied to the headstock backwash line.

In this state, after the backwashing liquid continues to flow through the water pipe backwashing line 12 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 solution is supplied to the valve V15.
Of the backwash line, a jet stream is formed from the perforated pipe portion 12a disposed inside and / or outside the water pipe at least corresponding to the water intake section 11b of the water pipe 11 in the backwash line. This jet flows out at least along the water intake section 11b of the water pipe 11 and jets into and / or outside the water intake section as a jet stream. 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 pipe 11, the inside of the water pipe 11 can be washed during the backwash. Therefore, it is not necessary to repair the water pipe for a long time.

Next, the backwash line 40 around the water conveyance pipe will be described. During the backwash operation, the valves V7 and V8 are closed, the valves V6, V10, and V9 are open, and the valve V12 is closed.
Is closed and the water in the water storage tank 15 is V6, P3, V10, P
It is preferable to operate so as to flow into the backwash line 40 around the headrace pipe via 4, V9. This allows the water to be pump P
The driving force of both P3 and P4 can be obtained and high-pressure high-speed water can be obtained, and the cleaning ability increases. When the water pipe peripheral backwash line is connected to another system, preferably pressurized water is supplied to the water pipe peripheral backwash line immediately.

In this state, the valves V41a and V41 are connected to the backwash line around the water pipe and the branch pipes 41, 42 and 43 thereof.
b, V42a, V42b, V43a, and V43b are opened and the backwashing liquid continues to flow for a while.
42b and V43b are closed. Then, the high-speed flow of the pressurized cleaning liquid is caused to flow by the water hammer caused by sudden closing of the valves V41b, V42b, and V43b.
A jet stream is jetted out of the perforated pipes 41a, 42a, 43a into the well 14 and the periphery of the branch pipe of the cleaning line around the headrace pipe, and further, the entire sand bed of the well 14 is removed. Fluidize. As a result, corrosive substances such as clayey soil, leaves and the like, and moss and mushrooms generated during operation are attached to the water intake section 11b of the water pipe and its surroundings, the branch pipe and its surroundings, and also the clayey soil and leaves attached to the gravel in the well 14. Is blown off, and if there is a water flow A at the water intake source, the blown-off soil and corrosives are washed off downstream by the water flow A, and the water pipe itself, the branch pipe itself and the entire well are cleaned.

At the time of the backwashing operation, it is preferable that the soil and corrosives blown off by the backwash jet as described above are more efficiently loaded on the water flow A. For this purpose, the water pipe 11 and the branch pipes 41, 42, 43 are connected to the water flow A.
It is preferable to arrange so as to be orthogonal to and control the upstream branch pipes to operate sequentially.

As shown in FIGS. 1 and 2, a backwash line 40 around the water pipe 11 is provided above the water intake part 11 b of the water pipe 11.
In the case where the branch pipes 41, 42 and 43 are arranged,
First, the water pipe backwash line 12 is operated to generate a jet from the water intake part 11b of the water pipe 11, and then the branch pipes 41, 4
2 and 43 sequentially from the upstream side of the water flow A (the valve V41
a, V42a, and V43a are sequentially opened) to generate a jet, and the jet rises upward from the bottom of the well, so that the soil and corrosive matter accumulated in the well become more efficient. The well is washed away by the water flow A, the inside of the well is further cleaned, and the gravel layer in the well is restored to the initial state, and the clean water can be stably withdrawn for a long period of time without a decrease in water rate. Become like

During 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.
This pulsation controls the pumps P1, P2P3, P4, etc., or the mixing units 25, 26, etc. to operate intermittently.

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 related 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, the jet of pressurized air (bubbles) causes the water intake section 11b and the perforated pipe portions 41a, 42a, 4 of the branch pipe.
The explosive flow from 3a significantly increases the momentum (power) of the jet flow, so that 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.

[0049]

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 performance is further enhanced, and a longer-term automatic operation is enabled.

The apparatus of the present invention has a simple structure and requires a minimum of 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 40 Water pipe peripheral backwash line 41, 42, 43 Same as branch pipe 41a, 42a, 43a Perforated pipe part

Claims (23)

[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 water supply pipe backwashing line, and a water supply pipe peripheral backwash line that is disposed around the water separation pipe at a predetermined distance and continuously or intermittently supplies a jet stream for cleaning the water conveyance pipe peripheral portion during the cleaning operation. A culvert-type water intake device comprising: 2. The underdrain type water intake device according to claim 1, wherein a base end of the water pipe 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 water pipe backwash line is connected to a drain line or the water storage tank. 4. The underdrain type water intake device according to claim 1, wherein a base end of the backwash line around the water pipe is connected to the water supply line downstream of a pump of the water supply line. 5. The underdrain type water intake apparatus according to claim 1, wherein an end of the backwash line around the water pipe is connected to a drainage line or the water storage tank. 6. In a steady operation, water is collected from a water intake section of the water pipe toward a water storage tank and the water supply line is operated. In the washing operation, the water pipe backwash line and / or
The underdrain type water intake device according to any one of claims 1 to 5, further comprising control means for automatically or manually operating the backwash line around the water guide pipe periodically or when required. 7. 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 water pipe backwash line for continuously or intermittently supplying a jet stream of the above, and air bubbles and / or cleaning disposed around the water pipe at a predetermined distance from the water pipe for cleaning the periphery of the water pipe during a cleaning operation. A backwash line around a water pipe that continuously or intermittently supplies a jet stream containing an auxiliary agent, and is installed on the backwash line, and a water pipe backwash line and a backwash line around a water pipe during a cleaning operation. And a mixing unit for mixing air bubbles and / or a cleaning aid into at least one of the above. 8. The underdrain type water intake device according to claim 7, wherein a base end of said water pipe backwash line is connected to said water supply line downstream of a pump of said water supply line. 9. The underdrain type water intake device according to claim 7, wherein an end of the water pipe backwash line is connected to a drain line or the water storage tank. 10. The underdrain type water intake device according to claim 7, wherein a base end of the backwash line around the water pipe is connected to the water supply line downstream of a pump of the water supply line. 11. An end of the backwash line around the water pipe is connected to a drainage line or the water storage tank.
0. A culvert-type water intake device according to any one of 0. 12. During steady 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 cleaning operation, the water pipe backwash line and / or the water pipe backwash area. The culvert type intake device according to any one of claims 7 to 11, further comprising control means for automatically or manually operating the line periodically or when required. 13. The cleaning device according to claim 12, wherein the control unit is configured to:
13. The underdrain type water intake device according to claim 12, further comprising means for selectively operating the bubble mixing unit and the cleaning agent mixing unit and for selectively operating the cleaning agent. 14. The air bubble according to claim 7, wherein said air bubble is a pressurized air bubble.
13. A culvert-type water intake device according to any one of 13. 15. The cleaning aid according to claim 7, wherein said cleaning aid is at least one selected from sand, a cleaning agent, hot water, and steam.
4. The culvert-type water intake device according to any one of 4. 16. The underdrain type water intake device according to claim 7, wherein the mixing unit is an ejector. 17. When operating the water intake device according to any one of claims 1 to 4 or the water intake device according to any one of claims 7 to 16, during steady operation, water is collected from a water intake source into a water storage tank through a water pipe. The underdrain is operated to supply water to a predetermined water supply facility through a water supply line and to operate the water pipe backwash line and / or the water pipe peripheral backwash line during the washing operation. How to operate the water intake device. 18. During the cleaning operation, the bubble mixing unit and the cleaning aid mixing unit are selectively operated,
The method for operating a culvert-type water intake device according to claim 17, wherein the cleaning aid is selected and operated. 19. The operating method of an underdrain type water intake device according to claim 17, wherein, during the cleaning operation, the water pipe backwash line is sequentially operated from the upstream side to the downstream side of the water intake source. 20. The method of operating a culvert-type water intake device according to claim 17, wherein, during the cleaning operation, the backwash line around the water conveyance pipe operates from the upstream side to the downstream side of the water intake source. 21. The method for operating a culvert type water intake device according to claim 17, wherein, during the cleaning operation, the water pipe backwash line is first activated, and then the water pipe peripheral backwash line is activated. 22. The operation of the underdrain type water intake system according to claim 17, wherein during the cleaning operation, the operation is performed so as to generate a pulsating flow in the backflow line for the water pipe and / or the backwash line around the water pipe. Method. 23. The operation of the underdrain type water intake device according to claim 17, wherein during the cleaning operation, the water pipe backwash line and / or the water pipe backwash line and the mixing unit operate intermittently. Method.