Water sampling device, water quality measurement device, and water sampling method

Abstract

To provide a water sampling device capable of discharging sample water from a water storage part.SOLUTION: The water sampling device includes a water storage section that stores sample water therein, a supply section that supplies the sample water to the water storage section, a measurement processing section that processes the sample water, and a water discharge section that discharges the sample water from the water storage section by the principle of siphon, and the water discharge section includes an inner pipe that extends upward from a bottom portion of the water storage section, and an outer pipe that is disposed above the bottom portion of the water storage section, has the inner pipe disposed therein, and has a closed upper end.SELECTED DRAWING: Figure 8

Description

[Technical Field]

[0001] The present specification relates to a water sampling device, a water quality measuring device, and a water sampling method. [Background technology]

[0002] Conventionally, for example, a water sampling device includes a water storage section that stores sample water therein, a supply section that supplies the sample water to the water storage section, and a water delivery section that transports the sample water from the inside of the water storage section to an external measuring device (e.g., Patent Document 1). However, for example, the sample water may contain suspended matter (insoluble matter, suspended matter), which is small particles that have not completely dissolved (e.g., particles with a diameter of 2 mm or less). In such cases, there is a demand to discharge the sample water (especially the suspended matter) from the water storage section. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2001-296290 Summary of the Invention [Problem to be solved by the invention]

[0004] Therefore, the object is to provide a water sampling device that can discharge sample water from a water reservoir. [Means for solving the problem]

[0005] The water sampling device is a water storage section for storing sample water therein; a supply unit that supplies the sample water to the water reservoir; a measurement processing unit for processing the sample water; a drainage section that drains the sample water from the water storage section by the siphon principle, The drainage section is an inner pipe extending upward from the bottom of the water storage section; The water storage unit further includes an outer pipe that is disposed above the bottom of the water storage unit, has the inner pipe disposed therein, and has a closed upper end. [Brief explanation of the drawings]

[0006] [Figure 1] Schematic diagram of a water quality measuring device according to an embodiment. [Figure 2] FIG. 10 is a front view of the water sampling device according to the embodiment. [Figure 3] FIG. 10 is a plan view of the water sampling device according to the embodiment. [Figure 4] Cross section of line IV-IV in Figure 2 [Figure 5] Cross section of line VV in Figure 4 [Figure 6] Cross section of Figure 4 along line VI-VI [Figure 7] Cross section of Figure 4 along line VII-VII [Figure 8] FIG. 10 is a longitudinal cross-sectional view of a main part illustrating the operation of the water sampling device according to the embodiment. [Figure 9] FIG. 10 is a longitudinal cross-sectional view of a main part illustrating the operation of the water sampling device according to the embodiment. [Figure 10] FIG. 10 is a schematic diagram of a water quality measuring device according to another embodiment, showing a vertical cross section of a water sampling device. [Figure 11] FIG. 10 is a longitudinal cross-sectional view of a main part of a water sampling device according to still another embodiment. [Figure 12] FIG. 10 is a longitudinal cross-sectional view of a main part of a water sampling device according to still another embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0007] In each drawing, the dimensions of the components may be enlarged or reduced relative to the actual dimensions, for example, to facilitate understanding, and the dimensional ratios between the drawings may not be consistent. Note that in each drawing, for example, to facilitate understanding, some of the components may be omitted.

[0008] Terms including ordinal numbers such as "first" and "second" are used to describe various components, but these terms are used only to distinguish one component from another, and the components are not particularly limited by these terms. The number of components including ordinal numbers is not particularly limited, and may be, for example, one. Furthermore, the ordinal numbers used in the following specification and drawings may differ from the ordinal numbers described in the claims.

[0009] An embodiment of the water quality measuring device and water sampling device will be described below with reference to Figures 1 to 9. Note that the following embodiment is provided as an example to aid in understanding the configuration of the water quality measuring device and water sampling device, and does not limit the configuration of the water quality measuring device and water sampling device.

[0010] As shown in Figure 1, the water quality measuring device 1 according to this embodiment includes a water sampling device 2 that samples sample water from a water sampling source X1, and a measuring device 3 that measures the quality of the sample water sent from the water sampling device 2. The water sampling device 2 includes a switching unit 4 that switches between a water supply state in which sample water is sent to the measuring device 3 and a stop state in which the sending of sample water is stopped. The water quality measuring device 1 may also include a processing device 5 that controls each component, for example, as in this embodiment.

[0011] Although not particularly limited, the sample water collected from the water collection source X1 may be, for example, treated sewage water, treated human waste water, industrial wastewater, water taken from a river or reservoir, well water, groundwater, etc. Furthermore, although not particularly limited, the water quality measured by the water quality measuring device 1 may be any indicator of the physical, chemical, or biological properties of water, such as nitrogen (nitrogen compounds), phosphorus (phosphorus compounds), nitric acid (nitrate ions), ammonia (ammonium ions), turbidity, chromaticity, pH, conductivity, water temperature, etc.

[0012] The processing device 5 may include, for example, an acquisition unit 5a that acquires each piece of information (data) from each unit, a storage unit 5b that stores each piece of information, a calculation unit 5c that calculates each piece of information, and a control unit 5d that controls each unit. The processing device 5 may also be a computer that includes, for example, a processor 5e such as a CPU and an MPU (for example, the calculation unit 5c, the control unit 5d), a memory 5f such as a ROM and a RAM (for example, the acquisition unit 5a, the storage unit 5b), various interfaces, etc.

[0013] As a result, the processor 5e executes the program 5g stored in the memory 5f, and the software and hardware work together to realize the units 5a to 5d of the processing device 5. The processing device 5 may be configured, for example, by a software circuit, or may be configured, for example, by a hardware circuit, or may be configured, for example, by a combination of a software circuit and a hardware circuit.

[0014] The processing device 5 may be configured as a single device, or may be configured as a plurality of devices that can communicate with each other. Specifically, the units 5a to 5d of the processing device 5 may be provided in a single device, or may be distributed across a plurality of devices that can communicate with each other.

[0015] Although not shown, the water quality measuring device 1 may include, for example, an input unit to which various information is input and an output unit that outputs various information. Although not particularly limited, the input unit may be, for example, a switch (push button switch, select switch, etc.) or a touch panel, and the output unit may be, for example, a display unit that displays information (for example, an electronic bulletin board or indicator light), a sound generation unit that emits information as sound (for example, a buzzer or speaker), or a signal output unit that outputs a signal to the outside (for example, a central monitoring panel, etc.).

[0016] As shown in Figures 2 to 6, the water sampling device 2 comprises a water storage section 6 that stores sample water therein, a supply section 7 that supplies sample water to the water storage section 6, a supply detection section 8 that detects the supply of sample water from the supply section 7 to the water storage section 6, a measuring tube 9 that transports sample water from inside the water storage section 6 toward the external measuring device 3 (see Figure 1), and a drainage section 10 that discharges sample water from the water storage section 6 using the siphon principle.

[0017] The water sampling device 2 may also be provided with an overflow section 11 that allows the sample water to overflow, as in this embodiment. In each drawing, the first direction D1 is referred to as the first horizontal direction D1, the second direction D2 is a horizontal direction perpendicular to the first horizontal direction D1 and is referred to as the second horizontal direction D2, and the third direction D3 is referred to as the up-down direction D3.

[0018] The water reservoir 6 may have, for example, a bottom portion 6a which is the lower end, a top portion 6b which is the upper end, and a side portion 6c which is disposed between the bottom portion 6a and the top portion 6b, as in this embodiment. As a result, the water reservoir 6 stores sample water in an internal space formed by the bottom portion 6a, the top portion 6b, and the side portion 6c.

[0019] Supply unit 7 may be, for example, a pipe as in this embodiment. Supply unit 7 may also extend from the outside to the inside of water storage unit 6, penetrating side portion 6c of water storage unit 6 as in this embodiment.

[0020] The supply detection unit 8 includes a water receiving unit 8a that receives sample water from the supply unit 7, and a water detection unit 8b that detects the presence of sample water in the water receiving unit 8a. The water receiving unit 8a includes outlets 8c that discharge the sample water, and the water detection unit 8b detects the presence of sample water above all of the outlets 8c.

[0021] As a result, when the supply rate of sample water supplied by the supply unit 7 is greater than the discharge rate of sample water discharged from the discharge port 8c, the sample water will accumulate in the water receiving unit 8a. Therefore, when sample water is being supplied from the supply unit 7 at a rate greater than the set flow rate, the water detecting unit 8b detects the sample water. Therefore, the supply detecting unit 8 can detect that sample water is being supplied at a rate greater than the set flow rate.

[0022] For example, as in the present embodiment, the water receiving section 8a may be configured with a side wall and a bottom wall, and the outlet 8c may be disposed on each of the side wall and the bottom wall. The sample water discharged from the outlet 8c of the water receiving section 8a or the upper end opening of the water receiving section 8a may be stored inside the water storage section 6, as in the present embodiment.

[0023] The number of outlets 8c is not particularly limited and may be, for example, four as in this embodiment, or may be, for example, one, two, three, or five or more. The water detection unit 8b is also not particularly limited and may be, for example, a float-type sensor as in this embodiment, or may be, for example, an electrode-type sensor.

[0024] For example, as in this embodiment, the measuring pipe 9 may penetrate the ceiling 6b of the water storage section 6 and extend in the up-down direction D3 from the outside to the inside of the water storage section 6. The measuring pipe 9 has an inlet 9a at its end (specifically, the lower end) for introducing sample water. As a result, the sample water is sent from the inlet 9a of the measuring pipe 9 arranged inside the water storage section 6 toward the external measuring device 3 (see FIG. 1).

[0025] Therefore, the sample water located at the inlet 9a of the measuring tube 9 is the sample water whose water quality is measured by the measuring device 3, and so the inlet 9a of the measuring tube 9 is disposed at the position of the sample water whose water quality is measured by the measuring device 3, and serves as the measurement processing unit 9a that processes (specifically, introduces) the sample water. Note that the switching unit 4 (see FIG. 1) is not particularly limited, and may be, for example, a pump (for example, a suction pump) disposed outside the water storage unit 6 as in this embodiment, or may be, for example, a pump (for example, a submersible pump) disposed inside the water storage unit 6.

[0026] Furthermore, when the supply detection unit 8 detects that sample water is being supplied, the switching unit 4 switches to a water supply state in which sample water is sent through the measuring tube 9. As a result, when sample water is supplied from the supply unit 7 to the water storage unit 6, the sample water is sent from the inside of the water storage unit 6 to the external measuring device 3 through the measuring tube 9.

[0027] Although not particularly limited, the switching unit 4 may be controlled by the processing device 5 to switch from a stopped state to a water supply state for a predetermined time when the supply detection unit 8 detects that sample water is being supplied at set intervals (e.g., 30 minutes, 1 hour, etc.). As a result, when sample water is supplied from the supply unit 7 to the water storage unit 6, only a set amount of sample water is sent to the measuring device 3 at set intervals.

[0028] In this way, when the supply detection unit 8 detects that sample water is being supplied, the switching unit 4 may switch to the water supply state after a certain time has elapsed. However, this configuration is not limited to this, and for example, when the supply detection unit 8 detects that sample water is being supplied, the switching unit 4 may immediately switch to the water supply state.

[0029] 4 to 7, drainage unit 10 includes inner pipe 12 extending upward from bottom 6a of water storage unit 6, and outer pipe 13 within which inner pipe 12 is disposed. Drainage unit 10 may also include fixing portion 14 for fixing outer pipe 13 to side portion 6c of water storage unit 6, for example, as in this embodiment.

[0030] For example, as in this embodiment, the inner pipe 12 may penetrate the bottom 6a of the water storage section 6 and extend in the vertical direction D3 from the outside to the inside of the water storage section 6. As a result, the upper end opening 12a of the inner pipe 12 is disposed inside the water storage section 6, and the lower end opening 12b of the inner pipe 12 is disposed outside the water storage section 6.

[0031] Outer pipe 13 is disposed above bottom 6a of water storage section 6. This leaves a gap between the lower end of outer pipe 13 and bottom 6a of water storage section 6. Outer pipe 13 may have openings 13a extending upward from the lower end, as in this embodiment. The number of openings 13a is not particularly limited, and may be, for example, two, as in this embodiment, or may be, for example, one, or three or more.

[0032] The upper end of the outer tube 13 is closed, and the outer tube 13 has an open hole 13b that opens the inside of the outer tube 13, at a position below the upper end opening 12a of the inner tube 12 and above the lower end of the outer tube 13. As a result, for example, as shown in Figure 8, when the water level of the sample water Y1 reaches a position above the upper end opening 12a of the inner tube 12, the sample water Y1 is discharged to the outside of the water storage section 6 by the drain section 10.

[0033] Specifically, due to the siphon principle, the sample water Y1 flows between the bottom 6a of the water storage section 6 and the lower end of the outer tube 13, between the inner periphery of the outer tube 13 and the outer periphery of the inner tube 12, and then through the inside of the inner tube 12 (see the dashed dotted line in Figure 8). In this way, the sample water Y1 is discharged from the inside of the water storage section 6 to the outside.

[0034] 9, the discharge of the sample water Y1 due to the siphon principle stops when the water level of the sample water Y1 drops to the position of the open hole 13b. As a result, the water level of the sample water Y1 is maintained between the open hole 13b of the outer tube 13 and the upper end opening 12a of the inner tube 12.

[0035] On the other hand, the inlet 9a of the measurement tube 9, which is the measurement processing section 9a, is located below the open hole 13b of the outer tube 13. This ensures that the water sample Y1 is always stored at the position of the measurement processing section 9a. Therefore, the water sample Y1 can be reliably sent to the measurement device 3, for example.

[0036] In this embodiment, when the supply detection unit 8 detects that the water sample Y1 is being supplied, i.e., when the water sample Y1 is supplied from the supply unit 7 to the water storage unit 6, the water sample Y1 is sent to the measurement device 3 through the measurement tube 9 by the switching unit 4. This makes it possible to prevent, for example, the water level of the water sample Y1 from falling below the position of the measurement processing unit 9a.

[0037] Note that, for example, as in this embodiment, open hole 13b may be disposed above opening 13a, extend in the radial direction of outer pipe 13, and penetrate outer pipe 13. Also, for example, as in this embodiment, open hole 13b may be disposed above center position P1 between upper end opening 12a of inner pipe 12 and bottom 6a of water storage section 6 in the up-down direction D3.

[0038] Most of the suspended matter is composed of substances heavier than water, and therefore the suspended matter sinks in the sample water Y1 and tends to remain at the bottom 6a of the water reservoir 6.

[0039] Therefore, the inlet 9a of the measurement tube 9, which is the measurement processing section 9a, is disposed above the center position P2 between the open hole 13b of the outer tube 13 and the bottom 6a of the water storage section 6 in the vertical direction D3. This makes it possible to prevent suspended matter from being present near the measurement processing section 9a. Therefore, for example, it is possible to prevent suspended matter from being contained in the water sample Y1 measured by the measurement device 3.

[0040] 7, the distance W1 between the lower end of the outer tube 13 and the bottom 6a of the water storage section 6 is smaller than the distance W2 between the inner circumference of the outer tube 13 and the outer circumference of the inner tube 12. This allows the sample water Y1 near the bottom 6a of the water storage section 6 to be discharged to the outside of the water storage section 6, as shown in FIG. 8. Therefore, for example, suspended matter remaining at the bottom 6a of the water storage section 6 can be efficiently discharged to the outside of the water storage section 6.

[0041] Although not particularly limited, the distance W1 between the lower end of outer pipe 13 and bottom 6a of water storage section 6 may be, for example, 2 mm to 20 mm. Note that the distance W1 between the lower end of outer pipe 13 and bottom 6a of water storage section 6 is preferably, for example, 10 mm or less, more preferably, for example, 8 mm or less, and further preferably, for example, 6 mm or less.

[0042] Furthermore, the bottom 6a of the water storage section 6 is provided with an inclined bottom section 6d that slopes downward toward the drainage section 10. As a result, the suspended matter that has accumulated at the inclined bottom section 6d of the water storage section 6 is guided by the inclined bottom section 6d toward the drainage section 10. Therefore, for example, the suspended matter that has accumulated at the inclined bottom section 6d of the water storage section 6 can be efficiently discharged to the outside of the water storage section 6.

[0043] 2 to 6, overflow portion 11 may be, for example, a pipe. And, for example, as in this embodiment, overflow portion 11 may penetrate side portion 6c of water storage portion 6 and extend from the inside to the outside of water storage portion 6. And, for example, as in this embodiment, upper end opening 11a of overflow portion 11 may be located higher than upper end opening 12a of inner pipe 12.

[0044] As a result, for example, when the water level of the sample water Y1 reaches a position above the upper end opening 11a of the overflow part 11, the sample water Y1 is discharged to the outside of the water storage part 6 not only by the drain part 10 but also by the overflow part 11. When the water level of the sample water Y1 reaches a position below the upper end opening 11a of the overflow part 11, the discharge of the sample water Y1 by the overflow part 11 stops, while only the discharge of the sample water Y1 by the drain part 10 continues.

[0045] As described above, the water sampling device 2, as in this embodiment, a water reservoir 6 for storing sample water Y1 therein; a supply unit 7 that supplies the sample water Y1 to the water reservoir 6; a measurement processing unit 9a for processing the sample water Y1; a drainage section 10 that drains the sample water Y1 from the water storage section 6 by the siphon principle, The drainage section 10 is an inner pipe 12 extending upward from the bottom 6a of the water storage section 6; and an outer pipe (13) that is disposed above the bottom (6a) of the water storage section (6), has the inner pipe (12) disposed therein, and has a closed upper end. This configuration is preferable.

[0046] According to this configuration, when the water level of the sample water Y1 becomes higher than the upper end of the inner tube 12, the siphon principle causes the sample water Y1 to flow between the bottom 6a of the water storage section 6 and the outer tube 13, between the outer tube 13 and the inner tube 12, and inside the inner tube 12, in this order. As a result, the water sample Y1 is discharged from the water storage section 6 by the drain section 10, and the water sample Y1 can be discharged from the water storage section 6.

[0047] In addition, in the water sampling device 2, as in this embodiment, the drainage section 10 has an opening 13b for opening the inside of the outer pipe 13 at a position lower than the upper end opening 12a of the inner pipe 12 and higher than the lower end of the outer pipe 13 in order to stop the discharge of the sample water Y1; The measurement processing unit 9a is disposed below the open hole 13b. This configuration is preferable.

[0048] According to this configuration, the open hole 13b opens the inside of the outer tube 13 at a position below the upper end opening 12a of the inner tube 12 and above the lower end of the outer tube 13. As a result, when the water level of the sample water Y1 becomes higher than the upper end opening 12a of the inner tube 12, the water sample Y1 is discharged from the water storage section 6 by the drain section 10 until the water level of the sample water Y1 falls to the position of the open hole 13b.

[0049] Therefore, the water level of the sample water Y1 is maintained between the open hole 13b and the upper end opening 12a of the inner tube 12. In contrast, the measurement processing section 9a is disposed below the open hole 13b. This allows the sample water Y1 to be constantly stored at the position of the measurement processing section 9a.

[0050] In addition, in the water sampling device 2, as in this embodiment, The measurement processing unit 9a is disposed above a center position P2 between the open hole 13b and the bottom 6a of the water storage unit 6 in the vertical direction D3. This configuration is preferable.

[0051] With this configuration, suspended matter tends to sink in the sample water Y1 and accumulate at the bottom 6a of the water storage section 6, but the measurement processing section 9a is positioned above the center position P2 between the open hole 13b and the bottom 6a of the water storage section 6 in the vertical direction D3, thereby making it possible to prevent suspended matter from being present near the measurement processing section 9a.

[0052] In addition, in the water sampling device 2, as in this embodiment, A distance W1 between the lower end of the outer pipe 13 and the bottom 6a of the water storage section 6 is smaller than a distance W2 between the inner periphery of the outer pipe 13 and the outer periphery of the inner pipe 12. This configuration is preferable.

[0053] With this configuration, suspended matter tends to sink in the water sample Y1 and accumulate at the bottom 6a of the water storage section 6, but the distance W1 between the lower end of the outer tube 13 and the bottom 6a of the water storage section 6 is smaller than the distance W2 between the inner circumference of the outer tube 13 and the outer circumference of the inner tube 12. This allows the water sample Y1 near the bottom 6a of the water storage section 6 to be discharged from the water storage section 6.

[0054] In addition, in the water sampling device 2, as in this embodiment, The bottom 6a of the water storage section 6 has a sloped bottom 6d that slopes downward toward the drainage section 10. This configuration is preferable.

[0055] With this configuration, suspended matter tends to sink in the sample water Y1 and accumulate at the bottom 6a of the water storage section 6, but the inclined bottom 6d of the water storage section 6 is inclined downward toward the drainage section 10. This allows the suspended matter that accumulates at the inclined bottom 6d of the water storage section 6 to be guided toward the drainage section 10 by the inclined bottom 6d.

[0056] In addition, the water sampling device 2, as in this embodiment, a measuring pipe 9 for sending the sample water Y1 from the inside of the water storage section 6 to the outside, The measuring tube 9 has an inlet 9a at its end for introducing the sample water Y1, The measurement processing unit 9a is the inlet 9a. This configuration is preferable.

[0057] According to this configuration, the measuring tube 9 sends the sample water Y1 from the inside to the outside of the water storage section 6. As a result, the inlet 9a at the end of the measuring tube 9 processes the sample water Y1 into the measuring tube 9, and therefore the inlet 9a of the measuring tube 9 becomes a measurement processing section 9a that processes the sample water Y1.

[0058] In addition, the water sampling device 2, as in this embodiment, a switching unit 4 that switches between a water supply state in which the sample water Y1 is supplied through the measuring tube 9 and a stop state in which the supply is stopped; a supply detection unit (8) that detects the presence of supply of the water sample (Y1) from the supply unit (7) to the water storage unit (6), The switching unit 4 switches to the water supply state when the supply detection unit 8 detects that the sample water Y1 is being supplied. This configuration is preferable.

[0059] According to this configuration, when the supply detection unit 8 detects that the sample water Y1 is being supplied, the switching unit 4 switches to a water supply state in which the sample water Y1 is sent through the measuring tube 9. As a result, when the sample water Y1 is supplied from the supply unit 7 to the water storage unit 6, the sample water Y1 is sent through the measuring tube 9 from inside the water storage unit 6 to the external measuring device 3.

[0060] In addition, in the water sampling device 2, as in this embodiment, The supply detection unit 8 a water receiving section 8a that receives the sample water Y1 from the supply section 7; a water detection unit 8b for detecting the presence of the sample water Y1 in the water receiving unit 8a, The water receiving section 8a is provided with an outlet 8c for discharging the sample water Y1, The water detection unit 8b detects that the water sample Y1 is present at a position above the outlet 8c. This configuration is preferable.

[0061] According to this configuration, the water receiver 8a receives the sample water Y1 from the supply unit 7, while discharging the sample water Y1 from the outlet 8c. As a result, when the supply amount of the sample water Y1 supplied by the supply unit 7 is greater than the discharge amount of the sample water Y1 discharged from the outlet 8c, the sample water Y1 will accumulate in the water receiver 8a.

[0062] The water detector 8b then detects that the water sample Y1 is located above the outlet 8c. As a result, when the water sample Y1 is being supplied from the supply unit 7 at a rate equal to or greater than the set flow rate, the water detector 8b detects the water sample Y1. Therefore, the supply detector 8 can detect that the water sample Y1 is being supplied at a rate equal to or greater than the set flow rate.

[0063] In addition, the water quality measuring device 1, as in this embodiment, The water sampling device 2; a measuring device 3 for measuring the water quality of the sample water Y1 sent from the measuring tube 9; This configuration is preferable.

[0064] With this configuration, the measurement device 3 can measure the water quality of the water sample Y1.

[0065] In addition, the water sampling method is as follows: A water sampling method using the water sampling device 2, the supply unit 7 supplies the sample water Y1 to the water storage unit 6; the measurement processing unit 9a processes the water sample Y1; The drainage unit 10 discharges the sample water Y1 from the water storage unit 6. This method is preferred.

[0066] According to this method, the water sample Y1 can be discharged from the water reservoir 6.

[0067] The water quality measuring device 1 and the water sampling device 2 are not limited to the configurations of the above-described embodiments, nor are they limited to the above-described effects. Furthermore, it goes without saying that various modifications can be made to the water quality measuring device 1 and the water sampling device 2 without departing from the spirit of the present invention. For example, it goes without saying that one or more of the configurations, methods, etc. of the various modified examples described below can be arbitrarily selected and adopted in the configurations, methods, etc. of the above-described embodiments.

[0068] (A) In the water sampling device 2 according to the above embodiment, the drainage section 10 is configured to have an open hole 13b that opens the inside of the outer pipe 13 at a position below the upper end opening 12a of the inner pipe 12 and above the lower end of the outer pipe 13. However, the water sampling device 2 is not limited to this configuration.

[0069] For example, the drainage section 10 may not have the open hole 13b, and the inside of the outer tube 13 may be open by a gap between the lower end of the outer tube 13 and the bottom 6a of the water storage section 6. With this configuration, when the water level of the sample water Y1 is higher than the upper end opening 12a of the inner tube 12, the water sample Y1 is discharged from the water storage section 6 by the drainage section 10 until the water level of the sample water Y1 falls to the position of the lower end of the outer tube 13.

[0070] (B) Furthermore, in the water sampling device 2 according to the above embodiment, the measurement processing section 9a is configured to be located below the open hole 13b. However, the water sampling device 2 is not limited to this configuration.

[0071] For example, the measurement processing unit 9a may be arranged above the open hole 13b. Specifically, the measurement processing unit 9a may be arranged between the open hole 13b and the upper end opening 12a of the inner tube 12 in the vertical direction D3.

[0072] (C) Furthermore, in the water sampling device 2 according to the above embodiment, the measurement processing unit 9a is configured to be positioned above the center position P2 between the open hole 13b and the bottom 6a of the water storage section 6 in the vertical direction D3. However, the water sampling device 2 is not limited to this configuration. For example, the measurement processing unit 9a may be configured to be positioned below the center position P2 between the open hole 13b and the bottom 6a of the water storage section 6 in the vertical direction D3.

[0073] (D) Furthermore, in the water sampling device 2 according to the above embodiment, the distance W1 between the lower end of the outer pipe 13 and the bottom 6a of the water storage section 6 is configured to be smaller than the distance W2 between the inner periphery of the outer pipe 13 and the outer periphery of the inner pipe 12. However, the water sampling device 2 is not limited to this configuration.

[0074] For example, the distance W1 between the lower end of the outer pipe 13 and the bottom 6a of the water storage section 6 may be greater than the distance W2 between the inner circumference of the outer pipe 13 and the outer circumference of the inner pipe 12. Alternatively, the distance W1 between the lower end of the outer pipe 13 and the bottom 6a of the water storage section 6 may be the same as the distance W2 between the inner circumference of the outer pipe 13 and the outer circumference of the inner pipe 12.

[0075] (E) Furthermore, in the water sampling device 2 according to the above embodiment, the bottom 6a of the water storage section 6 is configured to have an inclined bottom section 6d that slopes downward toward the drainage section 10. However, the water sampling device 2 is not limited to this configuration.

[0076] For example, the bottom 6a of the water storage section 6 may not have the inclined bottom 6d. In such a configuration, for example, the bottom 6a of the water storage section 6 may be formed flat over the entire area so as to extend along the first horizontal direction D1 and the second horizontal direction D2.

[0077] (F) Furthermore, the water sampling device 2 according to the above embodiment is configured to include a measurement pipe 9 that sends the water sample Y1 from the inside of the water storage section 6 to the outside (specifically, the measuring device 3), and the measurement processing section 9a is the inlet 9a of the measurement pipe 9. In other words, the processing of the water sample Y1 by the measurement processing section 9a is configured to introduce the water sample Y1 into the measurement pipe 9 in order to send the water sample Y1 to the measuring device 3. However, the water sampling device 2 is not limited to this configuration.

[0078] For example, the water sampling device 2 may be configured to include a sensor that detects the water quality of the water sample Y1, and the measurement processing unit may be the sensor. In other words, the processing of the water sample Y1 by the measurement processing unit may be configured to detect the water quality of the water sample Y1. Although not particularly limited, an example of such a configuration may be the configuration shown in Figure 10. The configuration related to Figure 10 will be described below.

[0079] (F-1) As shown in Figure 10, the water sampling device 2 is equipped with a sensor 15 that is disposed inside the water storage section 6 and detects the water quality of the sample water Y1. The water quality detected by the sensor 15 is not particularly limited, but may be, for example, nitric acid (nitrate ions), ammonia (ammonium ions), turbidity, color, pH, conductivity, water temperature, etc.

[0080] The information detected by the sensor 15 is then sent to the measuring device 3, which measures the water quality of the water sample Y1 based on the detection of the sensor 15. As a result, the water sample Y1 at the position of the sensor 15 becomes the water sample Y1 whose water quality is measured by the measuring device 3, and the sensor 15 is placed at the position of the water sample Y1 whose water quality is measured by the measuring device 3, and becomes the measurement processing unit 15 that processes the water sample Y1.

[0081] In this way, the water sampling device 2, as shown in FIG. A sensor 15 is disposed inside the water storage section 6 and detects the water quality of the sample water Y1. The measurement processing unit 15 is the sensor 15. The following configuration is also possible.

[0082] According to this configuration, the sensor 15 is disposed inside the water storage section 6 and detects the water quality of the water sample Y1. As a result, the sensor 15 performs a process of detecting the water quality of the water sample Y1, and therefore the sensor 15 becomes a measurement processing section 15 that processes the water sample Y1.

[0083] As shown in FIG. 10, the water quality measuring device 1 includes: The water sampling device 2; and a measuring device 3 that measures the water quality of the sample water Y1 based on the detection of the sensor 15. The following configuration is also possible.

[0084] With this configuration, the measurement device 3 can measure the water quality of the water sample Y1.

[0085] The water sampling device 2 according to FIG. 10 may be, for example, a supply detection unit 8 (not shown in FIG. 10; see the above-described embodiment, particularly FIGS. 4 to 6) that detects the supply of the water sample Y1 from the supply unit 7 (not shown in FIG. 10; see the above-described embodiment, particularly FIGS. 4 to 6) to the water storage unit 6; The sensor 15 detects the water quality of the water sample Y1 when the supply detection unit 8 detects that the water sample Y1 is being supplied. This configuration is preferable.

[0086] With this configuration, when the supply detection unit 8 detects that the water sample Y1 is being supplied, the sensor 15 detects the water quality of the water sample Y1. As a result, when the water sample Y1 is supplied from the supply unit 7 to the water storage unit 6, the sensor 15 detects the water quality of the water sample Y1.

[0087] In addition, in the water sampling device 2 according to FIG. 10, for example, as in the above embodiment (see particularly FIGS. 4 to 6), The supply detection unit 8 (not shown in FIG. 10; see the above embodiment, particularly FIGS. 4 to 6) a water receiving section 8a that receives the sample water Y1 from the supply section 7; a water detection unit 8b for detecting the presence of the sample water Y1 in the water receiving unit 8a, The water receiving section 8a is provided with an outlet 8c for discharging the sample water Y1, The water detection unit 8b detects that the water sample Y1 is present above the outlet 8c. This configuration is preferable.

[0088] According to this configuration, the water receiver 8a receives the sample water Y1 from the supply unit 7, while discharging the sample water Y1 from the outlet 8c. As a result, when the supply amount of the sample water Y1 supplied by the supply unit 7 is greater than the discharge amount of the sample water Y1 discharged from the outlet 8c, the sample water Y1 will accumulate in the water receiver 8a.

[0089] The water detector 8b then detects that the water sample Y1 is located above the outlet 8c. As a result, when the water sample Y1 is being supplied from the supply unit 7 at a flow rate equal to or greater than the set flow rate, the water detector 8b detects the water sample Y1. Therefore, the supply detector 8 can detect that the water sample Y1 is being supplied at a flow rate equal to or greater than the set flow rate.

[0090] (G) Furthermore, the water sampling device 2 according to the above embodiment is configured to include a supply detection unit 8 that detects the supply of sample water Y1 from the supply unit 7 to the water storage unit 6. However, the water sampling device 2 is not limited to this configuration.

[0091] For example, the water sampling device 2 may be configured not to include the supply detection unit 8. In such a configuration, for example, regardless of whether the water sample Y1 is supplied to the water storage unit 6 or not, the water quality of the water sample Y1 is measured by the measuring device 3 after a set time has elapsed (in the configuration according to the above embodiment, the water sample Y1 is delivered through the measuring tube 9. In the configuration according to Figure 10, the sensor 15 detects the water quality of the water sample Y1).

[0092] (H) Furthermore, the water sampling device 2 according to the above embodiment is configured to include a switching unit 4 that switches between a water supply state in which the water sample Y1 is supplied through the measuring tube 9 and a stop state in which the supply is stopped. However, the water sampling device 2 is not limited to this configuration. For example, the water sampling device 2 may not include the switching unit 4 and may be configured to continuously supply the water sample Y1 through the measuring tube 9.

[0093] (I) In the water sampling device 2 according to the above embodiment, the supply detection unit 8 is configured to include a water receiving portion 8a having an outlet 8c, and a water detection unit 8b that detects whether the water sample Y1 is present above any of the outlets 8c of the water receiving portion 8a. However, the water sampling device 2 is not limited to this configuration.

[0094] For example, the supply detection unit 8 may be configured to include a flow meter (e.g., an ultrasonic flow meter, an electromagnetic flow meter, an impeller flow meter, etc.) that measures the flow rate of the sample water Y1 flowing inside the supply unit 7. Furthermore, for example, the water detection unit 8b may be configured to detect that the sample water Y1 is present at a position below at least one outlet 8c of the water receiving unit 8a.

[0095] (J) Furthermore, in the water sampling device 2 according to the above embodiment, the open hole 13b that opens the inside of the outer pipe 13 is provided in the outer pipe 13, and the position of the open hole 13b is fixed relative to the water storage section 6. However, the water sampling device 2 is not limited to this configuration.

[0096] (J-1) For example, the open hole may be provided in a component separate from the outer tube 13. Although not particularly limited, an example of such a configuration may be the configuration shown in FIG.

[0097] (J-2) Also, for example, the position of the open hole may be configured to be changeable with respect to the water storage section 6. Although not particularly limited, an example of such a configuration may be the configuration shown in FIG. 11 or FIG. 12.

[0098] (J-3) First, the water sampling device 2 according to FIG. 11 will be described below.

[0099] 11, the drainage unit 10 includes a connecting pipe 16 that is connected to an outer pipe 13. The outer pipe 13 has a through hole 13c that extends in the radial direction, and a first open end 16a of the connecting pipe 16 is connected to the through hole 13c of the outer pipe 13, and a second open end 16b of the connecting pipe 16 forms an open hole 16b that opens the inside of the outer pipe 13. As a result, the open hole 16b is provided in the connecting pipe 16, which is a separate part from the outer pipe 13.

[0100] The connecting pipe 16 also includes a first pipe 16c connected to the outer pipe 13, a second pipe 16d having an open hole 16b, and a holder 16e that connects the first pipe 16c and the second pipe 16d and holds the second pipe 16d to the first pipe 16c. As shown in Figures 11(a) and 11(b), the holder 16e allows the second pipe 16d to be rotated about an axis in the second horizontal direction D2. This allows the position of the open hole 16b to be changed relative to the water storage section 6.

[0101] 11(a), when the second pipe 16d extends in the first horizontal direction D1, the position of the open hole 16b is the same as the position of the through hole 13c of the outer pipe 13 in the vertical direction D3. Also, when the second pipe 16d extends in the vertical direction D3, for example, as shown in FIG. 11(b), the position of the open hole 16b is lower than the position of the through hole 13c of the outer pipe 13.

[0102] (J-4) Next, the water sampling device 2 according to FIG. 12 will be described below.

[0103] As shown in Fig. 12, the outer tube 13 has a plurality of through holes 13d-13g extending in the radial direction. In Fig. 12, the outer tube 13 has four through holes 13d-13g at different positions in the up-down direction D3. The number of through holes 13d-13g is not particularly limited and may be, for example, two, three, or five or more. The plurality of through holes 13d-13g are referred to from the top as the first through hole 13d, the second through hole 13e, the third through hole 13f, and the fourth through hole 13g.

[0104] The drainage unit 10 is provided with closing parts 17 that are detachable from the through holes 13d to 13g in order to close the through holes 13d to 13g of the outer pipe 13. As shown in Figures 12(a) and 12(b), the positions of the open holes 13d to 13g can be changed relative to the water storage unit 6 by changing the through holes 13d to 13g that are closed by the closing parts 17.

[0105] 12(a), when the closing portion 17 closes the first to third through holes 13d to 13f, the open hole 13g becomes the fourth through hole 13g that opens to the inside of the outer tube 13. Also, when the closing portion 17 closes the first through hole 13d, the third through hole 13f, and the fourth through hole 13g, as shown in FIG. 12(b), the open hole 13e becomes the second through hole 13e that opens to the inside of the outer tube 13.

[0106] 12(b), even when the closing portion 17 does not close the third through hole 13f and the fourth through hole 13g, the open hole 13e becomes the second through hole 13e. That is, in FIG. 12, when the plurality of through holes 13d to 13g open to the inside of the outer tube 13, the through hole that is located at the top among the through holes 13d to 13g that open to the inside of the outer tube 13 becomes the open hole.

[0107] (K) For example, the order of execution of each step, such as the operations, procedures, steps, and stages, in the methods and apparatuses shown in the claims, specifications, and drawings, can be implemented in any order, as long as the result of a previous step is not used in a subsequent step. For example, even if a description is made using "first," "next," etc. for convenience, this does not mean that the steps must be executed in that order. [Explanation of symbols]

[0108] 1...water quality measuring device, 2...water sampling device, 3...measuring device, 4...switching unit, 5...processing device, 5a...acquisition unit, 5b...storage unit, 5c...calculation unit, 5d...control unit, 5e...processor, 5f...memory, 5g...program, 6...water storage unit, 6a...bottom, 6b...top unit, 6c...side unit, 6d...inclined bottom unit, 7...supply unit, 8...supply detection unit, 8a...water receiving unit, 8b...water detection unit, 8c...discharge port, 9...measuring pipe, 9a...inlet (measurement processing unit), 10...drainage unit, 11...overflow unit, 11a...upper end opening, 12...inner pipe, 12a...upper end opening, 12b...lower end opening, 13 ...outer tube, 13a...opening, 13b...open hole, 13c...through hole, 13d...first through hole (open hole), 13e...second through hole (open hole), 13f...third through hole (open hole), 13g...fourth through hole (open hole), 14...fixing part, 15...sensor (measurement processing part), 16...connecting pipe , 16a...first open end, 16b...second open end (open hole), 16c...first pipe, 16d...second pipe, 16e...holding part, 17...closing part, D1...first lateral direction, D2...second lateral direction, D3...vertical direction, P1, P2... center position, W1, W2... distance, X1... water sampling source, Y1... sample water

Claims

1. a water storage section for storing sample water therein; a supply unit that supplies the sample water to the water reservoir; a measurement processing unit for processing the sample water; a drainage section that drains the sample water from the water storage section by the siphon principle, The drainage section is an inner pipe extending upward from the bottom of the water storage section; a water sampling device comprising: an outer pipe that is positioned above the bottom of the water storage section, has the inner pipe positioned inside, and has a closed upper end.

2. the drainage section has an opening for opening the inside of the outer tube at a position lower than the upper end opening of the inner tube and higher than the lower end of the outer tube in order to stop the discharge of the sample water; The water sampling device according to claim 1 , wherein the measurement processing section is disposed below the open hole.

3. The water sampling device according to claim 2 , wherein the measurement processing section is disposed above a center position between the open hole and the bottom of the water storage section in the up-down direction.

4. 4. The water sampling device according to claim 1, wherein the distance between the lower end of the outer tube and the bottom of the water storage section is smaller than the distance between the inner circumference of the outer tube and the outer circumference of the inner tube.

5. 5. The water sampling device according to claim 1, wherein the bottom of the water storage section has an inclined bottom section that slopes downward toward the drainage section.

6. a measuring pipe for sending the sample water from the inside of the water storage section to the outside, the measuring tube has an inlet at an end thereof for introducing the sample water; The water sampling device according to any one of claims 1 to 5, wherein the measurement processing section is the inlet.

7. a switching unit that switches between a water supply state in which the sample water is supplied through the measuring tube and a stop state in which the supply is stopped; a supply detection unit that detects the supply of the sample water from the supply unit to the water storage unit, 7. The water sampling device according to claim 6, wherein the switching unit switches to the water supply state when the supply detection unit detects that the sample water is being supplied.

8. a sensor disposed inside the water storage section for detecting the water quality of the sample water; 6. The water sampling device according to claim 1, wherein the measurement processing unit is the sensor.

9. a supply detection unit that detects the supply of the sample water from the supply unit to the water storage unit, 9. The water sampling device according to claim 8, wherein the sensor detects the quality of the sample water when the supply detection unit detects that the sample water is being supplied.

10. The supply detection unit a water receiving section that receives the sample water from the supply section; a water detection unit that detects the presence of the sample water in the water receiving unit, the water receiving section is provided with an outlet for discharging the sample water, 10. The water sampling device according to claim 7, wherein the water detection unit detects that the sample water is located above the outlet.

11. The water sampling device according to claim 6 or 7, a measuring device that measures the water quality of the sample water sent from the measuring pipe.

12. The water sampling device according to claim 8 or 9, a measuring device that measures the water quality of the sample water based on the detection of the sensor.

13. A water sampling method using the water sampling device according to any one of claims 1 to 10, the supply unit supplies the sample water to the water storage unit; the measurement processing unit processes the sample water; The drainage section discharges the sample water from the water storage section.

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