JP5042051B2 - Water intake system and water intake device - Google Patents

Description

  The present invention relates to a water intake system and a water intake device that supply water to a water purification treatment unit from a first water collection unit and a second water collection unit via first and second independent water intake channels, respectively.

  In the conventional water intake device, for example, a water intake gate is disposed below a dam body provided in a dam reservoir or the like, and a sand discharge gate is disposed below the water intake gate. It can be moved up and down by the same hoisting machine provided at the upper part, and the left and right connecting shafts provided between the intake gate and the sand discharging gate are connected to any of the upper and lower locking grooves provided in the sand discharging gate or By separating, the intake channel and the sand discharge channel are opened and closed by a hoisting machine, and water is supplied from a reservoir to an irrigation pond for agriculture or the like (see, for example, Patent Document 1).

  In addition, as a water purifier, for example, a water supply tank communicates with a water pump, a prefilter, and a reverse osmosis membrane module through a water supply line, respectively, and the reverse osmosis membrane module is further connected via an external water supply line. In addition to being connected to a water supply port, it is connected to a water supply tank via a return line, and the raw water in the water supply tank is sent to a pre-filter by a water supply pump, so that organic substances that are the source of chlorine and odors in the raw water are removed. In addition, the pretreated raw water is separated into purified water that does not contain impurities and concentrated water using a reverse osmosis membrane module, and the purified water is supplied from the external water supply line to the water supply port. Some have returned to a water supply tank from the return line, and are producing purified water again (for example, refer patent document 2).

JP 2007-205022 (page 3, FIG. 1) JP 2007-136413 A (page 4, FIG. 3)

  However, in the water intake device described in Patent Document 1, when the water stored in the reservoir becomes high turbidity due to foreign matter such as mud and leaves being mixed into the water due to rain or the like, water is supplied to the irrigation pond or the like. Therefore, water could not be taken until the foreign matter in the water precipitated and the turbidity became small.

  Then, it was devised to obtain low-turbidity water that can be used for drinking water, etc. by generating purified water from the water in the water supply tank by the water purification apparatus described in Patent Document 2, but has a high water purification capacity. When the reverse osmosis membrane module having the above is used, there is a problem that costs increase due to replacement of the reverse osmosis membrane module.

  This invention is made paying attention to such a problem, and provides the water intake system and water intake device which can suppress the cost of water purification treatment, while being able to always take water stably below predetermined turbidity. For the purpose.

In order to solve the above-mentioned problem, the water intake system according to claim 1 of the present invention includes:
In the dam provided in the river, the river water is taken from the first water collecting part provided in the overflow part where the river water flows over the dam and the filtration layer provided in the bottom on the upstream side of the dam. A second water collecting section, and a water purification treatment section for treating water supplied from the first water collecting section and the second water collecting section via the first and second independent intake channels, respectively.
When the turbidity of the first catchment channel is within the reference value, water is supplied from the first catchment channel to the water purification unit, and when the turbidity of the first catchment channel exceeds the reference value, the second catchment channel It is characterized by switching to supply water to the water purification unit.
According to this feature, even when the turbidity of the first catchment channel exceeds the reference value, water can be supplied from the second intake channel having low turbidity to the water purification treatment unit, so that stable water intake can be performed at all times. In addition, when processing the water supplied to the water purification treatment unit, it is not necessary to provide facilities with advanced purification treatment capability required in the conventional system for supplying water from one intake channel to the water purification treatment unit. The maintenance cost of the processing unit can also be suppressed.

The water intake system according to claim 2 of the present invention is the water intake system according to claim 1,
The intake system is characterized in that the second intake passage is closed when the turbidity exceeds a limit value that is a predetermined amount larger than a reference value.
According to this feature, it can be determined that high-turbidity river water has passed through the filtration layer and taken into the second intake channel from the second intake port, and water can be prevented from being supplied to the water purification treatment unit.

The water intake device according to claim 3 of the present invention is
In a dam provided in a river, a water collector provided in an overflow section of the dam, a water collection pipe capable of filtering the river water through a filtration section including gravel upstream of the dam, and the water collection A water purifier and a water purifier for treating the water taken by the water collecting pipe, first and second water collecting pipes connecting the water collector and the water collecting pipe to the water purifying treatment section, respectively, and A drive valve provided; a first turbidity meter that measures the turbidity of the river water taken by the water collector; and a controller that controls the drive valve according to the turbidity measured by the turbidimeter. A water intake device comprising:
When the turbidity of the water taken by the water collector exceeds a reference value, the control unit closes the drive valve of the first water intake pipe connected to the water collector, and the water collection pipe The drive valve of the second intake pipe connected to the water intake pipe is opened, and when the turbidity of water falls below a reference value, the drive valve of the second intake pipe connected to the water collection pipe is closed, And the said drive valve of the said 1st intake pipe connected to the said water collector is open | released, It is characterized by the above-mentioned.
According to this feature, even if the turbidity of the water to be taken in the place where the dam is installed changes due to heavy rain, etc., the control unit can collect the water collector and the lower filtration collector according to the turbidity of the water to be taken By selecting which one to take water, water with a small turbidity can be constantly supplied to the purified water treatment unit.

The water intake device according to claim 4 of the present invention is the water intake device according to claim 3,
The water intake device is provided with a second turbidity meter for measuring the turbidity of water taken in the water collecting pipe, and the control unit supplies water from the water collecting pipe to the water purification treatment unit. In addition, when the turbidity of water measured by the second turbidimeter exceeds the reference value, the drive valve of the second intake pipe is closed.
According to this feature, the turbidity from the water collecting pipe can be monitored by the second turbidimeter, so that water having a turbidity below the reference value can be supplied from the water collecting pipe to the water purification treatment section, and the water purification treatment section. It is possible to reduce the load applied to.

The water intake device according to claim 5 of the present invention is the water intake device according to claim 3 or 4,
The filtration part is constituted by a filtration layer composed of an upper sand layer and a lower gravel layer, and a large number of pores provided in the water collecting pipe.
According to this feature, river water can be filtered in three stages of the sand layer and gravel layer of the filtration layer and the pores of the water collection pipe, so that water with low turbidity can be supplied to the second intake pipe.

The water intake device according to claim 6 of the present invention is the water intake device according to claim 5,
The water collecting pipe is provided with a water level meter for measuring the water level filtered by the filtration layer.
According to this feature, it is possible to confirm the amount of water that can be supplied from the second intake pipe to the water purification treatment unit, and it is possible to confirm the filtration status of the filtration layer.

  The best mode for carrying out a water intake system and a water intake apparatus according to the present invention will be described below based on examples.

  Embodiment 1 of the present invention will be described with reference to the drawings. First, FIG. 1 is a schematic view showing an overview of a water intake device in Embodiment 1 of the present invention, and FIG. 2 is a plan view showing a dam body. FIG. 3 is a front view showing the dam body, FIG. 4 is a longitudinal side view showing the dam body, FIG. 5 is a conceptual diagram showing a water intake pipe section and a water purification treatment section, and FIG. It is a block diagram which shows the structure of a water intake system, FIG. 7 is a turbidity correspondence table | surface by the combination of the turbidity of a 1st turbidimeter and a 2nd turbidimeter, and FIG. 8 shows each drive valve for every switching pattern. FIG. 9 is a flowchart showing a drive valve opening / closing process performed by the control circuit. In the following description, the left side of FIGS. 2, 4 and 5 is the front side of the water device, and the front side of FIG. 3 is the front side of the water device.

  Reference numeral 1 in FIG. 1 is a water intake apparatus to which the present invention is applied, and is an apparatus that collects industrial water, drinking water, and the like by a dam provided in a river and distributes the water. As shown in FIG. 1, this water intake device 1 is roughly divided into a dam body 2 as a dam for taking river water from a river, and river water taken by the dam body 2 according to the turbidity of the taken river water. The water intake pipe section 3 that can select whether to supply water to the purified water treatment section 4 to be described later or drain into the river, and river water supplied from the water intake pipe section 3 can be used for industrial water, drinking water, etc. And a water purification treatment unit 4 for performing the treatment.

  First, the dam body 2 will be described. As shown in FIGS. 2 to 4, the dam body 2 is provided with a dam body 5 that dams a river and a river water that overflows from the dam body 5. A water collector 6 serving as one water collecting unit, a first water collecting pipe 7 serving as a first water collecting channel for supplying river water taken by the water collecting unit 6 to the water purification unit 4, and water collected by the water collecting unit 6. A first test pipe 8 connected to a first turbidity meter 22 (see FIG. 5), which will be described later, for measuring the turbidity of river water, a filtration layer 9 provided on the riverbed upstream of the dam body 2, A water collecting pipe 10 that is provided below the filtration layer 9 and collects the river water filtered by the filtration layer 9, and a lower filtration collector that uses the river water taken by the water collection pipe 10 as a second water collection unit A second intake pipe 12 serving as a second intake passage for supplying water to the purified water treatment section 4 via 11, a water collection pipe 10, and a lower filtration collector 11. A multi-branch pipe 17 to be connected, a second test pipe 13 connected to a second turbidity meter 26 (see FIG. 5) described later for measuring the turbidity of river water taken by the water collection pipe 10, and the water collection pipe 10 The water level gauges 14 and 14 for constantly measuring the water level in the inside, and the air vent pipe 15 for venting air connected to the first water intake pipe 7 and the second water intake pipe, respectively.

  As shown in FIG. 3, an overflow section 5 a is formed in the approximate center of the upper end of the dam body 5 where river water overflows the dam body 5 from upstream (back side) to downstream (front side). A water collector 6 is provided in front of the overflow section 5a. In addition, a water intake 6 a for taking river water into the water collector 6 is provided at the right and center of the upper surface of the water collector 6, and fallen leaves etc. in the water collector 6 are provided in the water intake 6 a. A net 6b is installed to prevent the relatively large foreign matter from entering.

  Furthermore, as shown in FIG. 4, the upper surface of the water collector 6 is inclined downward toward the front side, and by this inclination, only from the lower part of the river water flowing above the upper surface of the water collector 6. Water intake is possible, and the effect of preventing fallen leaves and the like floating on the surface of the river water from being mixed into the water collector 6 is obtained. As shown in FIG. 3, a first intake pipe 7 and a first test pipe 8 are extended from the left end of the water collector 6 toward the intake pipe section 3. In addition, the 1st turbidity meter 22 which measures the turbidity of the river water taken in with the water collector 6 is provided in the base end part of the 1st test pipe 8. As shown in FIG.

  In the middle of the first intake pipe 7, an air vent pipe 15 that discharges air mixed when the river water is taken in by the water collector 6 from the first intake pipe 7 is provided upward. By discharging the air in the first intake pipe 7 through the air vent pipe 15, the river water in the first intake pipe 7 is smoothly sent toward the intake pipe section 3 and the water purification treatment section 4.

  As shown in FIG. 4, a filtration layer 9 as a river bed is formed on the upstream side (back side) of the dam body 5. The filtration layer 9 includes an upper sand layer 9a and a lower gravel layer 9b. , Is composed of. A part of the river water penetrates into the filtration layer 9 by water pressure and is stored below the filtration layer 9. Moreover, the river water stored below the filtration layer 9 is stored in a state of less turbidity than when flowing through the river by filtering fine foreign matters such as mud when passing through the filtration layer 9. .

  Further, a water collection pipe 10 having a hollow inside is embedded under the filtration layer 9. As shown in FIG. 2, a plurality of the water collecting pipes 10 are provided in the left-right direction below the filtration layer 9. The surface of each water collecting pipe 10 is provided with a large number of pores 10a penetrating to the inside of the water collecting pipe 10, and these pores 10a have the effect of filtering river water like the filtration layer 9. . That is, a series of filtration units 16 that filter the river water are configured by the filtration layer 9 and the numerous pores 10 a of the water collection pipe 10.

  As shown in FIG. 2, the multi-branch pipe 17 feeds the river water taken by the water collection pipe 10 to the lower filtration collector 11 as the second water collection section provided in the front part of the bank 5. This is a pipe, and the rear end portion is connected to the front end portion of each water collecting pipe 10. Further, the front end portion of the multi-branch pipe 17 is connected to the rear end portion of the lower filtration water collector 11 through a drilled hole 5b provided in the lower part of the bank body 5 in the front-rear direction.

  As shown in FIG. 3, a second intake pipe 12 and a second test pipe 13 are extended from the left end of the lower filtration water collector 11 toward the intake pipe section 3. In addition, a second turbidity meter 26 having the same configuration as the first turbidity meter 22 for measuring the turbidity of river water taken by the lower filtration water collector 11 is provided at the proximal end portion of the second test pipe 13. Is provided.

  Further, an air vent pipe 15 having the same configuration as that of the first water intake pipe 7 is provided in the middle of the second water intake pipe 12, and the air in the second water intake pipe 12 is discharged by this air vent pipe 15, so River water in the water pipe 12 is smoothly sent toward the intake pipe section 3 and the water purification treatment section 4.

  As shown in FIG. 2, among the water collecting pipes 10 buried below the filtration layer 9, the water collecting pipes 10, 10 arranged at the left and right ends include a water level for measuring the water level in the water collecting pipes 10, 10. A total of 14 is provided. These water level gauges 14 and 14 are connected to a control device 18 which will be described later, and by transmitting the measured water level data in the water collecting pipe 10 to the control device, the amount of water stored in the filtration layer 9 can be confirmed, The clogged state of the filtration layer 9 can be detected.

  Next, the water intake pipe section 3 and the water purification treatment section 4 will be described. As shown in FIG. 5, the water intake pipe section 3 includes a first water intake pipe 7 extending from the dam body 2 toward the water purification treatment section 4 and It is comprised from the 2nd water intake pipe 12 and the control apparatus 18 as a control part which switches the water supply to the water purification process part 4 with the 1st water intake pipe 7 and the 2nd water intake pipe 12.

  The first intake pipe 7 is provided with a first drive valve 19a as a drive valve that can be opened and closed by an electrical signal emitted from the control device 18 in the intake pipe section 3, and upstream of the first drive valve 19a. A first flow meter 20 that measures the flow rate of river water fed from the water collector 6 is provided on the (back side). Further, before and after the first drive valve 19a and the first flow meter 20, a first manual valve 21a and a second manual valve 21b that can be manually opened and closed are provided.

  The drive valve in the present embodiment uses an electric valve that can be opened and closed by an electric signal emitted from the control device 18, but a compressed air operation valve or the like may be used as long as the valve can be opened and closed by a signal issued from the control device 18. May be used.

  The first intake pipe 7 is provided with a first bypass pipe 7a that bypasses the first drive valve 19a, the first flow meter 20, the first manual valve 21a, and the second manual valve 21b. It is installed. Further, the first bypass pipe 7a is provided with a first drain pipe 7b for discharging the river water to the river when the first drive valve 19a is closed so as to branch from the first bypass pipe 7a. . The first drain pipe 7b is provided with a second drive valve 19b having the same configuration as the first drive valve 19a.

  Furthermore, the 3rd turbidimeter 28 which measures the turbidity in the 1st intake pipe 7 is provided in the upstream (back side) of the location where the 1st intake pipe 7 and the 1st bypass pipe 7a branch. . The first bypass pipe 7a is provided with a third manual valve 21c having the same configuration as that of the first manual valve 21a and the second manual valve 21b on the downstream side (front side) with respect to the first drain pipe 7b. It has been.

  Moreover, the 2nd intake pipe 12 is provided with the 3rd drive valve 23a as a drive valve which can be opened and closed by an electrical signal similarly to the 1st intake pipe, The upstream (back surface) of this 3rd drive valve 23a Side) is provided with a second flow meter 24 for measuring the flow rate of river water fed from the lower filtration water collector 11. A fourth manual valve 25a and a fifth manual valve 25b that can be manually opened and closed are provided before and after the third drive valve 23a and the second flow meter 24.

  The second intake pipe 12 is provided with a second bypass pipe 12a that bypasses the third drive valve 23a, the second flow meter 24, the fourth manual valve 25a, and the fifth manual valve 25b. It is installed. Further, the second bypass pipe 12a is provided with a second drain pipe 12b that discharges river water to the river when the third drive valve 23a is closed so as to branch from the second bypass pipe 12a. . The second drain pipe 12b is provided with a fourth drive valve 23b having the same configuration as the third drive valve 23a.

  Furthermore, the 4th turbidimeter 29 which measures the turbidity in the 1st intake pipe 12 is provided in the upstream (back side) of the location where the 2nd intake pipe 12 and the 2nd bypass pipe 12a branch. . The second bypass pipe 12a is provided with a sixth manual valve 25c having the same configuration as the fourth dynamic manual valve 25a and the fifth manual valve 25b on the downstream side (front side) from the portion branched from the second drain pipe 12b. Is provided.

  These first to sixth manual valves 21a, 21b, 21c, 25a, 25b, 25c are, for example, provided by the administrator of the water intake device 1 by the first drive valve 19a, the third drive valve 23a, the first flow meter 20, and the like. This valve is used for manually switching between the first intake pipe 7 and the second intake pipe 12 when the second flow meter 24 is inspected and maintained, or when the first drive valve 19a and the third drive valve break down. .

  In normal times, the first manual valve 21a and the second manual valve 21b, the fourth manual valve 25a and the fifth manual valve 25b are opened, and the third manual valve 21c and the sixth manual valve 25c are closed. .

  The first turbidimeter 22 and the second turbidimeter 26 measure the turbidity of river water that is turbid due to minute particles such as mud and sand contained in the river water. In this embodiment, the turbidity is 50 degrees or less as normal turbidity so that the downstream water purification treatment unit 4 does not have a large purification load, and the normal turbidity upper limit of 50 degrees is set as a reference value (use limit value). Can be set). However, this reference value is set by the purification capacity on the water purification treatment unit 4 side.

  Furthermore, the first turbidity meter 22 and the second turbidity meter 26 can constantly measure the turbidity of river water sent to the first test pipe 8 and the second test pipe 13 and are not particularly shown. However, the river water whose turbidity is measured is drained from the first test pipe 8 and the second test pipe 13 into the river.

  In addition, the intake pipe part 3 is provided in the management ridge which manages the intake apparatus 1, for example, and it is desirable that the administrator can manage and operate as described above.

  As shown in FIG. 5, the water purifying treatment unit 4 is supplied from the water collector 6 through the first intake pipe 7 or from the lower filtration intake pipe 11 through the second intake pipe 12 to the receiving reservoir 4a. And the size of the sedimentation basin 4b that removes foreign matter from the water by precipitating fine foreign matter after pouring or stirring the river water supplied by the landing basin 4a, and a size that can be filtered by the chemical injection in the sedimentation basin 4b. The filter pond 4c filters the foreign matter grown up through the filter membrane, and the reservoir 4d stores the water filtered by the filter pond 4c and distributes water according to each application. Further, the distribution reservoir 4d is provided with a water distribution level indicator 27 that constantly measures the amount of water stored in the distribution reservoir 4d.

  Further, as shown in FIGS. 5 and 6, the control device 18 provided in the intake pipe unit 3 includes a water distribution level meter 27 provided in the water reservoir 4 d of the water purification treatment unit 4, and the water collecting pipes 10, 10. , A first turbidity meter 22 provided at the proximal end of the test tube 8, a second turbidimeter 26 provided at the proximal end of the test tube 13, 3 turbidity meter 28 and 4th turbidity meter 29, the 1st flow meter 20 and the 2nd flow meter 24, and the 1st-4th drive valves 19a, 19b, 23a, and 23b are connected, and a water distribution level Opening and closing of the first to fourth drive valves 19a, 19b, 23a, 23b according to inputs from the meter 27, the first turbidity meter 22, the second turbidity meter 26, and the first flow meter 20 and the second flow meter 24 A control circuit 18a that performs control, and first to fourth drive valves 19 corresponding to the turbidity measured by the first turbidimeter 22 and the second turbidimeter 26. , 19b, 23a, closing operations of 23b is composed of a storage device 18b registered.

  More specifically, the storage device 18b has a first switching circuit 18a that switches the control circuit 18a in association with the turbidity measured by the first turbidimeter 22 and the second turbidimeter 26, as shown in FIGS. The turbidity correspondence table in which the open / close patterns of the fourth drive valves 19a, 19b, 23a, and 23b are registered in association with each other, and the first to fourth drive valves 19a that the control circuit 18a opens and closes according to the open / close patterns. An open / close pattern table in which the open / close operations of 19b, 23a, and 23b are registered is stored.

  The control device 18 is connected to an external power source by a power cable 28, and the control device 18 is operated by the power supplied from the external power source.

  Next, the drive valve opening / closing process of the first to fourth drive valves 19a, 19b, 23a, 23b executed by the control circuit 18a in the present embodiment is shown in the turbidity correspondence table of FIG. 7 and the open / close pattern table of FIG. This will be described based on the flowchart of FIG.

  As shown in FIG. 9, in the drive valve opening / closing process, first, in step Sa01, the control circuit 18a determines the water level of the distribution reservoir 4d based on the water level measured by the distribution level indicator 27 provided in the distribution reservoir 4d. Is determined to be less than the reference water level. In this embodiment, the reference water level is a water level indicating the allowable limit of the distribution reservoir 4d, such as a water level at which the distribution reservoir 4d is full, but may be appropriately set depending on the use environment of the intake device 1 and the like. Of course.

  If the water level measured by the water distribution level meter 27 is less than the reference water level, the process proceeds to step Sa02. If the water level measured by the water distribution level meter 27 is equal to or higher than the reference level, the process proceeds to step Sa13.

  In step Sa02, the control circuit 18a measures the turbidity of the river water using the first turbidimeter 22 connected to the first test pipe 8 and the second turbidimeter 26 connected to the second test pipe 13. The process proceeds to step Sa03.

  In the step of Sa03, the control circuit 18a refers to the turbidity correspondence table stored in the storage device 18b, and based on the turbidity measured in the step of Sa02, the selected opening / closing pattern is the opening / closing pattern A or not. Determine whether. If the selected opening / closing pattern is the opening / closing pattern A, the process proceeds to step Sa04, and if the selected opening / closing pattern is not the opening / closing pattern A, the process proceeds to Sa07.

  The open / close pattern A is used when the turbidity measured by the first turbidimeter 22 is not less than 0 degrees and less than 50 degrees and the turbidity measured by the second turbidimeter 26 is not less than 0 degrees and less than 25 degrees. Open / close pattern to be selected.

  In step Sa04, the control circuit 18a determines whether the currently selected opening / closing pattern is the opening / closing pattern B or the opening / closing pattern D. If the currently selected opening / closing pattern is the opening / closing pattern B or the opening / closing pattern D, the process proceeds to step Sa06. If the currently selected opening / closing pattern is not the opening / closing pattern B or opening / closing pattern D, the process proceeds to step Sa05.

  Here, the open / close pattern B is selected when the turbidity measured by the first turbidimeter 22 is not less than 50 degrees and less than 50 degrees and the turbidity measured by the second turbidimeter 26 is not less than 25 degrees. Open / close pattern.

  The open / close pattern D is an open / close pattern selected when the turbidity measured by the first turbidimeter 22 is 50 degrees or more and the turbidity measured by the second turbidimeter 26 is 50 degrees or more. The opening / closing pattern B and the opening / closing pattern D both close the third drive valve 23a.

  In step Sa05, the control circuit 18a performs an opening / closing pattern A switching process for switching from the current opening / closing pattern to the opening / closing pattern A with reference to the opening / closing pattern table shown in FIG. Specifically, after the turbidity measured by the third turbidimeter 28 becomes equal to or lower than the turbidity measured by the first turbidimeter 22, the first drive valve 19a and the third drive valve 23a are opened. Then, the second drive valve 19b and the fourth drive valve 23b are closed, and the drive valve opening / closing process is ended.

  By doing in this way, even when the river water in the 1st intake pipe 7 is higher turbidity than the turbidity measured by the 1st turbidimeter 22, the turbidity in the 1st intake pipe 7 is Since the open / close pattern cannot be switched to the open / close pattern A until large river water is drained, high turbidity river water can be prevented from being supplied to the landing pond 4a.

  In the present embodiment, the turbidity measured by the first and second turbidimeters 22 and 26 is changed in the open / close pattern with 50 ° as a reference value. This reference value depends on the water quality of the river and the water collecting pipe. It is possible to take an arbitrary value as appropriate depending on factors such as 10 scales. In particular, since the second turbidimeter 26 measures the turbidity of river water once filtered by the filtration unit 16, the reference value in the second turbidimeter 26 is set to be higher than the reference value in the first turbidimeter 22. You may set small.

  Furthermore, at this time, water supply from the water collector 6 through the first intake pipe 7 to the water receiving basin 4a is started, and water supply from the water collection pipe 10 through the second intake pipe 12 is started. A large amount of river water can be taken.

  In step Sa04, the control circuit 18a determines whether the currently selected opening / closing pattern is the opening / closing pattern B or the opening / closing pattern D, and the currently selected opening / closing pattern is the opening / closing pattern B or the opening / closing pattern. If it is D, the process proceeds to step Sa06.

  In the step of Sa06, the control circuit 18a performs drainage treatment for draining the river water in the second intake pipe 12. Specifically, in a state where the current opening / closing pattern is the opening / closing pattern B or the opening / closing pattern D, the control circuit 18a opens the fourth drive valve 23b for a predetermined time, so that the river water in the second intake pipe 12 is changed to the first. 2 Drain from the drain pipe 12b. At this time, drainage is continued until the turbidity measured by the fourth turbidimeter 29 is equal to or lower than the turbidity measured by the second turbidimeter 26.

  By doing in this way, since all the highly turbid river water can be drained into the second intake pipe 12, even if the third drive valve 23a is opened after this drainage treatment, the landing basin 4a It is possible to prevent high turbidity river water from being supplied.

  In this drainage treatment, high turbidity river water having a turbidity of 50 degrees or more remaining in the second intake pipe 12 due to the closing of the third drive valve 23a by the opening / closing pattern B or the opening / closing pattern D This is a process for not supplying water to 4a, and all the high turbidity river water is discharged from the second drain pipe 12b to the river by opening the fourth drive valve 23b for a predetermined time. In the present embodiment, the predetermined time for opening the fourth drive valve 23b is about 1 minute, but it is desirable that the predetermined time for opening the fourth drive valve 23b is appropriately changed according to the total length of the second intake pipe 12.

  The control circuit 18a proceeds to step Sa05 when the drainage process is completed in step Sa06, and ends the drive valve opening / closing process after performing the opening / closing pattern A switching process.

  In the step of Sa03, the control circuit 18a refers to the turbidity correspondence table stored in the storage device 18b, and based on the turbidity measured in the step of Sa02, the selected opening / closing pattern is the opening / closing pattern A or not. If the selected opening / closing pattern is not the opening / closing pattern A, the process proceeds to Sa07.

  In step Sa07, the control circuit 18a refers to the turbidity correspondence table stored in the storage device 18b. Based on the turbidity measured in step Sa02, the selected open / close pattern is the open / close pattern B. Determine whether. If the selected opening / closing pattern is the opening / closing pattern B, the process proceeds to step Sa08. If the selected opening / closing pattern is not the opening / closing pattern B, the process proceeds to Sa09.

  In step Sa08, the control circuit 18a performs an opening / closing pattern B switching process for switching from the current opening / closing pattern to the opening / closing pattern B with reference to the opening / closing pattern table shown in FIG. Specifically, after the turbidity measured by the third turbidimeter 28 becomes equal to or lower than the turbidity measured by the first turbidimeter 22, the first drive valve 19 is opened, and the second to fourth The drive valves 19b, 23a, and 23b are closed, and the drive valve opening / closing process is terminated. By doing so, the open / close pattern cannot be switched to the open / close pattern C until the river water having a high turbidity in the first intake pipe 7 is drained, as in the step of Sa05. Turbidity river water can be prevented from being supplied.

  At this time, water supply to the receiving pond 4 a is started from the water collector 6 through the first intake pipe 7. Moreover, since the water supply performed to the receiving basin 4a from the water collection pipe 10 via the 2nd intake pipe 12 is stopped, the flow of river water stops in the 2nd intake pipe 12 pipe | tube. For this reason, the river water that has passed through the filtration layer 9 is stored below the filtration layer 9. Further, this water storage amount can be confirmed by the water level gauge 14.

  In step Sa08, since the third drive valve 23a is closed by selecting the opening / closing pattern B, the water supply from the water collection pipe 10 to the landing basin 4a via the second intake pipe 12 is stopped. This is a measure for prolonging the filtration function of the filtration layer 9.

  In step Sa07, the control circuit 18a refers to the turbidity correspondence table stored in the storage device 18b. Based on the turbidity measured in step Sa02, the selected open / close pattern is the open / close pattern B. If the selected opening / closing pattern is not the opening / closing pattern B, the process proceeds to Sa09.

  In step Sa09, the control circuit 18a refers to the turbidity correspondence table stored in the storage device 18b, and based on the turbidity measured in step Sa02, the selected opening / closing pattern is the opening / closing pattern C. Determine whether. If the selected opening / closing pattern is the opening / closing pattern C, the process proceeds to step Sa010, and if the selected opening / closing pattern is not the opening / closing pattern C, the process proceeds to Sa14.

  In the step of Sa010, the control circuit 18a determines whether the currently selected opening / closing pattern is the opening / closing pattern B or the opening / closing pattern D, similarly to the step of Sa04. If the currently selected opening / closing pattern is the opening / closing pattern B or the opening / closing pattern D, the process proceeds to step Sa12. If the currently selected opening / closing pattern is not the opening / closing pattern B or the opening / closing pattern D, the process proceeds to step Sa11.

  In step Sa11, the control circuit 18a performs an open / close pattern C switching process for switching from the current open / close pattern to the open / close pattern C with reference to the open / close pattern table shown in FIG. Specifically, the second drive valve 19b and the third drive valve 23a are opened, the first drive valve 19a and the fourth drive valve 23b are closed, and the drive valve opening / closing process is ended.

  Here, the open / close pattern C is selected when the turbidity measured by the first turbidimeter 22 is 50 degrees or more and the turbidity measured by the second turbidimeter 26 is 0 degree or more and less than 50 degrees. The opening and closing pattern.

  At this time, water supply from the water collector 6 to the landing basin 4a via the first intake pipe 7 is stopped, and river water in the first intake pipe 7 is drained from the first drain pipe 7b to the river. Moreover, since the water supply performed to the receiving pond 4a from the water collecting pipe 10 via the 2nd intake pipe 12 is started, the turbidity is 0 degree | times or more and less than 50 degree | times. Is supplied with water.

  In step Sa10, the control circuit 18a determines whether the currently selected opening / closing pattern is the opening / closing pattern B or the opening / closing pattern D, and the currently selected opening / closing pattern is the opening / closing pattern B or the opening / closing pattern. If it is D, the process proceeds to step Sa12.

  In the step of Sa12, the control circuit 18a performs a drainage process for draining the river water in the second intake pipe 12 as in the step of Sa06. Then, when the drainage process is finished in the step of Sa12, the process proceeds to the step of Sa11, and after performing the opening / closing pattern C switching process, the driving valve opening / closing process is finished.

  In step Sa09, the control circuit 18a refers to the turbidity correspondence table stored in the storage device 18b, and based on the turbidity measured in step Sa02, the selected opening / closing pattern is the opening / closing pattern C. If the selected opening / closing pattern is not the opening / closing pattern C, the process proceeds to Sa14.

  In step Sa14, the control circuit 18a performs an opening / closing pattern D switching process for switching from the current opening / closing pattern to the opening / closing pattern D with reference to the opening / closing pattern table shown in FIG. Specifically, the second drive valve 19b is opened, the first drive valve 19a and the third to fourth drive valves 23a and 23b are closed, and the drive valve opening / closing process is ended.

  At this time, water supply from the water collector 6 to the landing basin 4a via the first intake pipe 7 is stopped, and river water in the first intake pipe 7 is drained from the first drain pipe 7b to the river. Moreover, since the water supply performed to the receiving basin 4a from the water collection pipe 10 via the 2nd intake pipe 12 is stopped, the river water which passed the filtration layer 9 is stored under the filtration layer 9. FIG. That is, by switching to the open / close pattern D, the water supply to the landing pond 4a is completely stopped, so that it is possible to prevent water supply with high turbidity to the landing pond 4a.

  Furthermore, in the case of heavy rain, the turbidity measured by the first turbidimeter 22 greatly exceeds the reference value of 50 degrees. In this state, by switching the opening / closing pattern to the opening / closing pattern D, the first driving valve 19a and the third to fourth driving valves 23a, 23b are closed, and the second driving valve 19b is opened, so that fine sand and small Dust and the like are always removed, and accumulation of dust in the water collector 6 is prevented.

  Further, the third and fourth drive valves 23a and 23b are closed, so that the filtering of the river water in the filtering unit 16 is stopped. At this time, the water level measured by the water level gauge 14 rises, and river water once filtered by the filtration layer 9 is ejected together with foreign matters remaining in the sand layer 9a when the river water is filtered. And these foreign materials are carried downstream by the water flow of the river accompanying heavy rain. That is, since the backwashing action acts on the filtration layer 9, the filtration ability of the filtration layer 9 can be recovered regardless of maintenance.

  The backwashing action is not limited to heavy rain, and can be generated by switching the open / close pattern to the open / close pattern D.

  In the step of Sa01, the control circuit 18a determines whether or not the water level of the distribution reservoir 4d is lower than the reference water level based on the water level measured by the distribution water level gauge 27 provided in the distribution reservoir 4d. If the water level measured by the ground water level gauge 27 is equal to or higher than the reference water level, the process proceeds to step Sa13.

  In step Sa13, the control circuit 18a measures the first flow meter 20 or the second flow meter 24 based on the flow rate of river water per unit time measured by the first flow meter 20 and the second flow meter 24. It is determined whether the flow rate is less than the reference amount. This reference amount is preferably the same as the amount of water distributed from the distribution reservoir 4d as industrial water or drinking water. That is, the reference amount of the present embodiment indicates the limit amount of water that can be supplied even if the distribution reservoir 4d is full. It should be noted that this reference amount may be set as appropriate depending on the usage environment of the water intake device 1.

  If the flow rate measured by the first flow meter 20 and the second flow meter 24 is less than the reference amount, the process proceeds to step Sa02, and the flow rate measured by the first flow meter 20 or the second flow meter 24 is the reference amount. If more, go to step Sa14.

  In step Sa14, the control circuit 18a refers to the open / close pattern table shown in FIG. 8, performs open / close pattern D switching processing for switching from the current open / close pattern to open / close pattern D, and ends the drive valve open / close processing.

  At this time, since no water is supplied to the distribution reservoir 4d from either the first intake pipe 7 or the second intake pipe 12, the water level of the distribution reservoir 4d does not rise from the reference water level. In addition, as described above, low turbidity river water can be supplied to the landing basin 4a, so the burden on the filter cartridge for filtering foreign matter in the filtration basin 4c is reduced, and as a result, the filter cartridge is washed or replaced. Cost can be reduced.

  As described above, even if the turbidity of the water to be taken in the place where the dam body 2 is installed changes due to heavy rain or the like, the control circuit 18a has the water collector 6 and the lower filtration water collector according to the turbidity of the water to be taken By selecting which of 11 to take water, water with small turbidity can be constantly supplied to the water purification treatment unit 4 stably.

  When the water turbidity measured by the second turbidimeter 26 exceeds the reference value while supplying water from the water collecting pipe 10 to the water purification treatment unit 4, the control circuit 18 a of the second water intake pipe 12. By closing the third drive valve 23a, the turbidity from the water collecting pipe 10 can be monitored by the second turbidity meter 26, so water of turbidity below the reference value is supplied from the water collecting pipe 10 to the water purification treatment unit 4. In addition, the load on the water purification unit 4 can be reduced.

  Moreover, the filtration part 16 is comprised by the filtration layer 9 comprised from the upper sand layer 9a and the lower gravel layer 9b, and many pores 10a provided in the water collection pipe 10, and is filtered. Since river water can be filtered in three stages of the sand layer 9a and the gravel layer 9b of the layer 9 and the pores 10a of the water collection pipe 10, water with low turbidity can be supplied to the second intake pipe 12.

  Further, since the water collecting pipe 10 is provided with water level gauges 14 and 14 for measuring the water level filtered by the filtration layer 9, the amount of water that can be supplied from the second intake pipe 12 to the water purification treatment unit 4 is confirmed. In addition, the filtration status of the filtration layer 9 can be confirmed.

  Next, a water intake system and a water intake apparatus according to the second embodiment will be described with reference to FIG.

  In the present embodiment, the turbidity of river water taken by the water collector 6 is measured only by the first turbidimeter 22, and the control circuit 18a supplies water to the landing pond 4a according to the measured turbidity. Is switched between the first intake pipe 7 and the second intake pipe 12.

  First, as shown in FIG. 5, the control circuit 18 a is configured such that the turbidity of the river water measured by the first turbidimeter 22 connected to the first test pipe 8 is 0 to 50 degrees, which is normal turbidity. It is determined whether or not. If the turbidity of the river water measured by the first turbidimeter 22 is not less than 0 degrees and not more than 50 degrees, the control circuit 18a opens the first drive valve 19a and closes the second drive valve 19b. By closing the 3 drive valve 23a and the 4th drive valve 23b, water supply to the receiving pond 4a is started from the water collector 6 through the first intake pipe 7.

  If the turbidity of the river water measured by the first turbidimeter 22 is greater than 50, the control circuit 18a closes the first drive valve 19a, opens the second drive valve 19b, and then performs the third drive. By opening the valve 23a and closing the fourth drive valve 23b, water supply is started from the water collecting pipe 10 to the receiving basin 4a via the second intake pipe 12.

  Further, the control circuit 18a has the turbidity of the river water measured by the first turbidimeter 22 increased from the reference value of 50 degrees by a predetermined amount, for example, 50 degrees, 100 degrees as a limit value. It is determined whether it is above. If the turbidity of the river water measured by the first turbidity meter 22 is greater than 100 degrees, the control circuit 18a closes the third drive valve 23a and the fourth drive valve 23b, thereby supplying the landing pond 4a. Stop water supply.

  By doing in this way, even if it does not use the 2nd turbidimeter 26, the river water through the filtration layer 9 can be supplied to the landing pond 4a. Note that the value of the above-mentioned predetermined amount is set by the filtration capacity of the filtration layer 9, and when the filtration capacity is lowered due to long-term use, the limit value is lowered.

  Furthermore, although the present embodiment has been described with reference to FIG. 5 which is the same drawing as that of the first embodiment, the control circuit 18a opens and closes the drive valves 19a, 19b, 23a and 23b by the first turbidimeter 22. Of course, the second turbidity meter 26 and the second test tube 13 need not be provided because the control is performed only by the turbidity measured in (1).

  As described above, even when the turbidity of the first intake pipe 7 exceeds the reference value, water can be supplied from the second intake pipe 12 having a low turbidity to the water purification treatment unit 4, so that stable intake can be performed at all times. Moreover, when processing the water supplied to the water purification process part 4, it is not necessary to provide the equipment which has the advanced purification process capability required with the conventional system which supplies water to the water purification process part 4 from one intake pipe. Moreover, the maintenance cost of the water purification process part 4 can also be suppressed.

  When the turbidity measured by the first turbidimeter 22 exceeds a limit value that is a predetermined amount greater than the reference value, high turbidity river water passes through the filtration layer 9 and the lower filtration collector 11. Therefore, it can be determined that water has been taken into the second water intake pipe 12, and water can be prevented from being supplied to the water purification treatment unit 4.

  Although the embodiments of the present invention have been described with reference to the drawings, the specific configuration is not limited to these embodiments, and modifications and additions within the scope of the present invention are included in the present invention. It is.

  For example, in the above-described embodiment, the filtration layer 9 including the upper sand layer 9 a and the lower gravel layer 9 b is formed on the riverbed upstream of the dam body 5, and the water collecting pipe 10 embedded below the filtration layer 9. A series of filtration units 16 for filtering river water are configured by the large number of pores 10a. However, the river layer is constructed by laminating a plurality of filters for water purification, and the river water taken by the water collecting pipe 10 is laminated. May be further reduced in turbidity.

  Moreover, in the said Example, although the water level meters 14 and 14 which always measure the water level in the water collection pipe 10 were provided and the water supply possible amount from the 2nd intake pipe 12 to the water purification process part 4 was confirmed, the 3rd drive valve is By comparing the flow rate of the second intake pipe 12 measured by the second flow meter 24 with the water level in the water collection pipe 10 measured by the water level gauges 14 and 14 when opened by the control circuit 18, the filtration unit The clogging of 16 or the cleaning time of the filtration unit 16 may be determined.

  Further, the reference value is set in relation to the processing load of the water purification unit 4, and the reference value can be lowered if the processing load is lowered, and the reference value can be raised if the processing load is increased.

It is the schematic which shows the whole image of the water intake apparatus in Example 1 of this invention. It is a top view which shows a dam main body. It is a front view which shows a dam main body. It is a vertical side view which shows a dam main body. It is a conceptual diagram which shows a water intake pipe part and a water purification process part. It is a block diagram which shows the structure of a water intake system. It is a turbidity correspondence table | surface by the combination of the turbidity of a 1st turbidimeter and a 2nd turbidimeter. It is an opening / closing pattern table which shows opening / closing of each drive valve for every opening / closing pattern. It is a flowchart which shows the drive valve opening / closing process performed with a control circuit.

Explanation of symbols

1 Intake device 2 Dam body (dam)
3 Intake pipe section 4 Water purification treatment section 5 Dyke body 5a Overflow section 6 Water collector (first water collection section)
7 First intake pipe (first intake channel)
9 Filtration layer 9a Sand layer 9b Gravel layer 10 Water collecting pipe 10a Pore 11 Lower filtration water collector (second water collecting part)
12 Second intake pipe (second intake channel)
14 Water level gauge 16 Filtration part 18 Control device (control part)
18a Control circuit 19a First drive valve 19b Second drive valve 20 First flow meter 22 First turbidity meter 23a Third drive valve 23b Fourth drive valve 24 Second flow meter 26 Second turbidity meter 27 Reservoir level meter 28 Third Turbidimeter 29 Fourth Turbidimeter

Claims (6)

In a dam provided in a river, the river water is collected from a first water collecting portion provided in an overflow portion where the river water overflows the dam and a filtration layer provided in an upstream bottom portion of the dam. A second water collecting section that performs water treatment, and a water purification treatment section that treats water supplied from the first water collecting section and the second water collecting section via first and second independent intake channels, respectively. ,
When the turbidity of the first intake channel is within a reference value, water is supplied from the first intake channel to the water purification unit, and when the turbidity of the first intake channel exceeds a reference value, the second intake channel is A water intake system characterized by switching to supply water to the water purification treatment unit.   The water intake system according to claim 1, wherein the water intake system closes the second water intake channel when the turbidity exceeds a limit value that is a predetermined amount greater than a reference value. In a dam provided in a river, a water collector provided in an overflow section of the dam, a water collection pipe capable of filtering the river water through a filtration section including gravel upstream of the dam, and the water collection A water purifier and a water purifier for treating the water collected by the water collecting pipe, first and second water intake pipes connecting the water collector and the water collecting pipe to the water purifying treatment section, and the water intake pipes. , A first turbidimeter that measures the turbidity of the river water collected by the water collector, and a control that controls the drive valve according to the turbidity measured by the turbidimeter A water intake device comprising:
When the turbidity of water collected by the water collector exceeds a reference value, the control unit closes the drive valve of the first intake pipe connected to the water collector, and The drive valve of the second intake pipe connected to the water pipe is opened, and when the turbidity of water falls below a reference value, the drive valve of the second intake pipe connected to the water collection pipe is closed. And the water intake apparatus characterized by opening the said drive valve of the said 1st water intake pipe connected to the said water collector.   The water intake device is provided with a second turbidity meter for measuring the turbidity of water collected in the water collecting pipe, and the control unit supplies water to the water purification treatment unit from the water collecting pipe. 4. The water intake device according to claim 3, wherein when the turbidity of water measured by the second turbidimeter exceeds the reference value, the drive valve of the second intake pipe is closed. .   The said filtration part is comprised by the filtration layer comprised from the upper sand layer and the lower gravel layer, and many pores provided in the said water collection pipe | tube. The water intake device described in 1.   The water intake device according to claim 5, wherein the water collecting pipe is provided with a water level meter for measuring a water level of the water filtered by the filtration layer.

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