JP5691075B2 - Water sampler - Google Patents

Description

  The present invention relates to a water sampler, and is particularly suitable for use in collecting water at a desired depth.

  In recent years, various efforts have been made to mitigate global warming. For example, energy saving and suppression of carbon dioxide emissions are being carried out. As one of such efforts, a method has been proposed in which carbon dioxide discharged from factories or power plants is collected and stored in an underground aquifer or the like.

  At this time, the carbon dioxide stored underground becomes an acidic carbon dioxide-dissolved solution in the underground aquifer, and if the carbon dioxide-dissolved solution is stored underground for a long time, May affect For this reason, it is necessary to evaluate and examine the influence of a large amount of carbon dioxide stored underground on the underground environment.

  Therefore, drilling the ground with boreholes to form excavation holes, collecting groundwater collected in the excavation holes, and analyzing the state and composition of the water, how much carbon dioxide leaks. You can figure out what you are doing. In particular, if groundwater can be collected at a plurality of different depths, it is possible to analyze the leakage of carbon dioxide according to the depth in more detail.

  When collecting groundwater from a borehole, various water sampling devices such as the Kitahara water sampling device and the Bandung water sampling device are used (see, for example, Patent Document 1 and Patent Document 2). The water sampling devices described in Patent Document 1 and Patent Document 2 are provided with water inlets and outlets at the upper and lower parts of a container for storing water, and the water inlets and outlets are opened and closed according to the water flow. A valve body is attached. Such a water sampler is suspended by a wire or the like and submerged in the ground water of the excavation hole, the valve body is opened, and the inside of the container is filled with water. Then, the valve body closes the entrance / exit and is pulled up to the ground in a state where water is sealed in the container, and groundwater is collected in the container.

  In order to collect groundwater at a desired depth using such a water sampler, the water sampler is provided with a mechanism for introducing water into the container when the water sampler reaches the desired depth. There is a need. Such a mechanism can be composed of, for example, a water pressure gauge and an electronic control device that issues an instruction to introduce groundwater into the container when the measurement value by the water pressure gauge is equal to the water pressure at a desired depth. .

  However, when such a mechanism is provided, the water sampling device becomes complicated, and depending on the mechanism, the water sampling device becomes large, and there arises a problem that it is difficult to apply to a small excavation hole having a diameter of about several tens of centimeters. .

  Such problems exist not only when investigating the effects of underground storage of carbon dioxide, but also when collecting groundwater for various research purposes, and in collecting groundwater from boreholes by boring. Not limited to this, the same applies to the general case of collecting water.

Japanese Utility Model Publication No. 64-50341 JP-A-8-220084

  An object of the present invention is to provide a water sampler having a simple structure capable of collecting groundwater at a desired depth in view of the above-described conventional technology.

In order to achieve the above object, a first aspect of the present invention includes a container having a water sampling hole that is a flow path that is suspended in water by a rope and introduces water from the outside to the inside, and the sampling of the container. A valve body that opens and closes a water hole; a water level meter provided outside the container; and a coupler in which a water intake portion that takes in water from the outside into the flow path and the flow path is formed. Is opened by water pressure when the container reaches a predetermined depth of water, and the water level gauge has a pair of terminals provided outside the container, and the terminals are short-circuited by water. It is possible to detect that the container has landed by detecting that the terminal and the water sampling hole are positioned so that the terminal is located above the water sampling hole in the vertical direction. to but water bottle, characterized in that it is connected through the flow path of the coupler That.

In the first aspect, since the valve body is provided to open the water sampling hole when the water sampling device reaches a predetermined depth, water at the predetermined depth can be reliably collected. . In particular, since it is only necessary to use a valve body with a simple structure, the structure of the entire water sampler can be simplified, and a low-cost water sampler is provided with the simplification of the structure. Moreover, the water level can be acquired simultaneously with the collection of water.
Further, when the water sampler reaches the water, the terminal is short-circuited with water. However, when the water sampler reaches a predetermined depth, the valve body is opened and water is taken into the storage unit. At this time, the gas in the storage unit reaches the terminals of the water level gauge to insulate the terminals. If such insulation between terminals is observed, it is possible to reliably collect groundwater at a predetermined depth by stopping the dropping of the water sampler.

According to a second aspect of the present invention, in the water sampling device described in the first aspect, the sampling device is provided with a water sampling container that is stored inside the container and stores water introduced into the container. It is in a water container.

In the second aspect, the container has a double structure in which a water sampling container is accommodated in the container, and water is collected by the water sampling container. For this reason, if water is collected and pulled up to the ground, and then the water collection container is taken out, the water in the water collection container can be used for analysis or the like without transferring the groundwater to another container. Thus, labor for taking out groundwater from the water sampler can be saved.

According to a third aspect of the present invention, in the water sampling device described in the second aspect, the container is formed in a long cylindrical shape, and the water sampling hole is formed on one end side in the direction of lifting from the water. The other end side is provided with a detachable lid member, and the water sampling container is formed in a long shape with a diameter smaller than the diameter of the container.

In the third aspect, since the container and the water sampling container are both long members, even if the water sampling container is inclined, it is regulated by the inner surface of the container. For this reason, it is suppressed that the water sampling container inclines and the groundwater stored in the inside is spilled.

According to a fourth aspect of the present invention, in the water sampling device described in the second or third aspect, the water sampling container is housed in the container such that an opening thereof faces the bottom of the water. It is in the water sampler.

In the fourth aspect, methane or the like dissolved in the ground water can be collected as a gas in the water sampling container.

According to a fifth aspect of the present invention, there is provided the water sampler according to any one of the first to fourth aspects, wherein the valve body is a check valve.

In the fifth aspect, a low-cost water sampler having a simple structure can be provided using a general check valve.

  ADVANTAGE OF THE INVENTION According to this invention, the water sampling device of the simple structure which can extract | collect groundwater of a desired depth is provided.

It is a figure which shows an example of the utilization form of the water sampling device which concerns on Embodiment 1 of this invention. It is a top view of the water sampling device which concerns on Embodiment 1 of this invention. It is a disassembled perspective view of the water sampling device which concerns on Embodiment 1 of this invention. It is sectional drawing of the water sampling device which concerns on Embodiment 1 of this invention. It is a conceptual diagram explaining operation | movement when setting the non-return valve which concerns on Embodiment 1 of this invention. It is the schematic for demonstrating operation | movement of the water sampling device which takes in groundwater. It is the schematic for demonstrating operation | movement of the water sampling device which takes in groundwater. It is the schematic explaining the water sampling device at the time of extract | collecting the gas dissolved in the groundwater of the predetermined depth. It is the schematic explaining the aspect of utilization of the water sampling device which concerns on Embodiment 2 of this invention. It is a conceptual diagram explaining the case where the condition of water pollution is investigated by collection of groundwater by the water sampling device concerning other embodiments of the present invention.

  Hereinafter, the best mode for carrying out the present invention will be described.

<Embodiment 1>
FIG. 1 is a diagram illustrating an example of a usage pattern of a water sampler according to Embodiment 1 of the present invention. As shown in the drawing, an excavation hole 1 is formed in the ground by boring, and groundwater 2 is accumulated in the excavation hole 1. The water sampler 10 is suspended to the water of depth L by the wire 3, and after collecting water in the vicinity of the depth L, it is pulled up to the ground via the wire 3, and the groundwater inside the water sampler 10 is analyzed. Used.

  2 is a plan view of the water sampler according to Embodiment 1 of the present invention, FIG. 3 is an exploded perspective view of the water sampler, and FIG. 4 is a cross-sectional view of the water sampler. As shown in these drawings, the water sampler 10 includes a container 20 into which water is introduced, a check valve 30 that is an example of a valve body attached to the container 20, and a sample collected in the container 20. A water container 40 and a water level gauge 50 are provided.

  The container 20 is a long cylindrical member that can accommodate the water collection container 40 therein. An opening on one end side of the container 20 is a water sampling hole 21, which is a water flow path from the outside to the inside. A check valve 30 is detachably attached to the water sampling hole 21. In the present embodiment, threads are provided on the inner periphery of the water sampling hole 21 and the outer periphery on one end side of the check valve 30, and these are screwed together.

  A lid member 22 is detachably attached to the other end side of the container 20. In the present embodiment, the container 20 and the lid member 22 are provided with threads, and these are screwed together. By attaching the lid member 22 and the water level gauge 50 to each of both ends of the container 20, a storage portion 23, which is a space for storing the water sampling container 40, is formed inside the container 20.

  The lid member 22 is provided with a ball valve 24. When the ball valve 24 is opened, the storage portion 23 communicates with the outside, and when the ball valve 24 is closed, the storage portion 23 is sealed. Although details will be described later, the ball valve 24 is used to adjust the pressure in the storage unit 23 and extract the gas in the storage unit 23.

  The check valve 30 is a valve body that opens and closes the water sampling hole 21 of the container 20. More specifically, the check valve 30 has a cylindrical valve housing 31. A valve member 32 is provided inside the valve housing portion 31, and a nut 35 that is screwed into the inner peripheral surface of the valve housing portion 31 is provided. A spring 34 is attached between the valve member 32 and the nut 35, and the valve member 32 is biased toward the opening 33 provided on one end side of the valve accommodating portion 31. The valve member 32 has a tip end surface formed larger than the opening area of the opening 33, and the opening 33 can be blocked by the tip end surface. The nut 35 is for adjusting the urging force of the spring 34. If the nut 35 is rotated by a wrench or the like and advanced toward the opening 33, the urging force of the spring increases. Yes.

  In such a check valve 30, the front end surface of the valve member 32 closes the opening 33 by the urging force of the spring 34, while the valve member 32 is housed when the external atmospheric pressure or water pressure exceeds the urging force of the spring 34. It moves to the part 23 side, and the opening part 33 is open | released. The valve member 32 is provided with a flow path 36 that penetrates the valve member 32, and water that has flowed into the valve accommodating portion 31 as the opening 33 is opened passes through the flow path 36 of the opening 33. The nut 23 is introduced into the storage portion 23 through the opening.

  Therefore, as will be described in detail later, if the biasing force of the spring 34 is balanced with the water pressure at the depth L of the groundwater 2 (see FIG. 1), when the water sampler 10 reaches the depth L, the valve member 32 Open and the water at that depth is introduced into the container 20.

  The water sampling container 40 is an elongate container that has an opening 41 at one end and stores water introduced into the container 20. The water sampling container 40 is stored inside the container 20 with the opening 41 facing the water sampling hole 21 of the container 20, and the water introduced from the water sampling hole 21 flows into the water sampling container 40 and is stored. The If the lid member 22 is removed from the container 20, the water sampling container 40 can be easily put in and out of the storage portion 23 of the container 20. For this reason, the groundwater 2 can be used for the purpose of analysis or the like without taking out the water sampling container 40 storing the groundwater 2 and transferring the groundwater 2 to another container.

  The water level meter 50 is for measuring the water level of the groundwater 2 and is connected to the container 20 via a coupler 60. Specifically, the water level meter 50 is provided with a measuring unit 51 which is a space into which water from the coupler 60 is introduced at one end side, and the measuring unit 51 is provided with two terminals 52. Yes. Conductive wires 53 are connected to these terminals 52, and the conductive wires 53 are led to the ground together with the wires 3.

  The coupler 60 is a member that couples the check valve 30 and the water level gauge 50, and a flow path 61 is formed therein, and a water intake portion 62 that takes in water from the outside is provided in the flow path 61. . The coupler 60 is configured so that water introduced from the water intake section 62 of the coupler 60 passes through the flow path 61, reaches the opening 33 of the check valve 30, and reaches the measuring section 51 of the water level gauge 50. ing.

  When the water sampler 10 reaches the groundwater 2, the groundwater 2 is also launched into the measuring unit 51 through the water sampling hole 21. Then, since the two terminals 52 are short-circuited through the groundwater 2, if it is detected that the two terminals 52 are short-circuited on the ground, it is found that the water sampler 10 has landed. At this time, the water level M (see FIG. 1) of the groundwater 2 can be obtained by measuring the length of the wire 3 suspended from the excavation hole 1.

  With such a water level meter 50, the water level M of the groundwater 2 can be obtained simultaneously with sampling, and the sampling operation and the water level measurement operation can be rationalized.

  The container 20 is made of SUS, and the water collection container 40 is made of acrylic. However, the material is not particularly limited, and any material and shape that can withstand the water pressure or the pressure in the container 20 may be used.

  Next, the usage method of the water sampling device 10 is demonstrated. FIG. 5 is a conceptual diagram illustrating an operation when setting the check valve according to Embodiment 1 of the present invention.

First, the biasing force of the spring 34 of the water sampler 10 is set. The urging force at this time is the same as the water pressure at the depth L (see FIG. 1) of the groundwater 2 to be sampled. For example, suppose that the groundwater 2 of 20 m is collected as the depth L. In this case, if the depth L is 20 m, the water pressure of the depth is about 2kg weight / cm ^2. Therefore, the nut 35 is rotated to adjust the urging force of the spring 34 so that a force of ² kg / cm ² is applied to the valve member 32 via the spring 34.

Then, it is confirmed whether or not a force of ² kgf / cm ² is actually applied to the valve member 32. Specifically, the ball valve 24 is opened, a tube is attached to the opening of the ball valve 24, and one end of the tube is put into water. On the other hand, a gas tank (He tank in the figure) 73 is connected to the opening 33 of the check valve 30 via a tube 74, and helium stored in the gas tank 73 is pumped toward the opening 33. A pressure gauge 72 is attached to the tube 74 so that the pressure fed to the opening 33 can be confirmed.

When helium is pumped, the helium gas presses the distal end surface of the valve member 32 from the opening 33 side. If helium is continuously pumped, the pressure of helium gas exceeds ² kgf / cm ² . At this time, since the pressure of helium exceeds the urging force of the spring 34, the distal end surface of the valve member 32 is separated from the opening 33, and the opening 33 is opened. As a result, helium flows into the storage portion 23 via the flow path 36 of the valve member 32 and appears as bubbles in the water of the water tank 71 via the ball valve 24 and the tube 70. Pressure of the pressure gauge 72 at which the bubbles appeared, the valve member 32 is a pressure required to open the opening 33, the pressure checks whether a 2kg weight / cm ^2.

After setting the check valve 30 as described above, the ball valve 24 is closed, and the water sampler 10 is dropped into the groundwater 2. FIG.6 and FIG.7 is the schematic for demonstrating operation | movement of the water sampling device which takes in groundwater. As shown in FIG. 6, when the water sampler 10 reaches the groundwater 2, the groundwater flows into the flow path 61 from the water intake 62 of the coupler 60. The groundwater 2 reaches from the flow path 61 to the measuring unit 51 of the water level meter 50, the terminal 52 is short-circuited, and the water level of the groundwater 2 is measured. On the other hand, the groundwater 2 flows into the opening 33 from the flow path 61, but since the water pressure is 0 kgf / cm ² near the surface of the groundwater 2, the valve member 32 of the check valve 30 does not open the opening 33. The groundwater is not taken into the storage unit 23.

  When the water sampler 10 is further submerged and the depth L reaches 20 m, the water pressure at the depth L exceeds the biasing force of the spring 34 of the check valve 30 as shown in FIG. The valve member 32 is pressed toward the container 20 by water pressure, and the opening 33 is opened. As a result, the groundwater 2 is introduced from the opening 33 through the flow path 36 of the valve member 32 to the storage portion 23 of the container 20. At this time, since the water sampling container 40 is stored in the container 20 with the opening 41 facing the check valve 30 side, the groundwater is also stored directly in the water sampling container 40.

  In addition, although it cannot measure directly whether the water sampling device 10 reached the depth L, it can be judged whether the water sampling device 10 reached the depth L with the following method.

  That is, when the water sampler 10 reaches the depth L, the groundwater 2 is taken into the storage unit 23 and at the same time, helium flows out from the storage unit 23 to the outside. When helium flows out of the storage unit 23, a part of the helium accumulates in the measurement unit 51 of the water level gauge 50, and the helium insulates between the terminals 52. If this insulation is observed on the ground, the groundwater 2 at the depth L can be reliably collected in the water collection container 40 by stopping the dropping of the water sampler 10.

  Further, if the groundwater 2 is introduced into the storage portion 23, the water pressure applied to the valve member 32 from the opening 33 side and the water pressure applied to the valve member 32 from the nut 35 side are offset, so that the biasing force of the spring 34 The valve member 32 closes the opening 33 again. For this reason, even when the water sampler 10 is dropped to a position exceeding the depth L of the groundwater 2 or when the water sampler 10 is pulled up from the depth L, the groundwater newly enters the storage unit 23. There is nothing. From this, groundwater 2 at a predetermined depth L can be collected even by dropping the water sampling device 10 sufficiently deeply into the groundwater without depending on the insulation of the terminal 52 of the water level gauge 50 as described above.

  Thereafter, water at a depth L can be collected by lifting the water sampler 10 to the ground, removing the lid member 22 and taking out the water collection container 40 of the storage unit 23.

  Furthermore, the water sampler 10 according to the present invention can collect not only the groundwater 2 but also various gases dissolved in the groundwater 2 at a predetermined depth L.

  FIG. 8 is a schematic diagram for explaining a water sampler when collecting gas dissolved in groundwater at a predetermined depth. As shown in the drawing, in the storage unit 23, gas 80 is collected in part in addition to the groundwater 2 collected at the depth L. The storage unit 23 was originally filled with helium, but when the groundwater 2 was taken into a part of the storage unit 23 and the helium was left in the remainder, the opening 33 was closed, and the groundwater 2 Methane dissolved in the gas is secured in the storage unit 23 as a gas.

  The gas 80 secured in this way is collected as follows. First, after the water sampler 10 is lifted to the ground, a septum 81 is attached to the ball valve 24, and a vinyl sheet 82 is provided so as to cover the entire lid member 22 side of the container 20. Then, the ball valve 24 is opened, the needle portion 83 of the syringe 84 is pierced into the vinyl sheet 82 and the septum 81, and the tip of the needle portion 83 is passed through the flow path of the ball valve 24 to reach the storage portion 23. In short, the gas 80 in the storage unit 23 is collected in the syringe 84 in a state where it is blocked from outside air.

  In the water sampling device 10 described above, the check valve 30 is provided in the container 20 so as to open the water sampling hole 21 when the water sampling device 10 reaches the depth L. 2 can be reliably collected. In particular, since it is only necessary to use a valve body with a simple structure such as the check valve 30 to obtain the groundwater 2 having a predetermined depth L, the entire structure of the water sampler 10 can be simplified, and the structure can be simplified. A low-priced water sampler 10 can be provided as a result.

  Further, the container 20 has a double structure in which the water sampling container 40 is accommodated, and the ground water 2 is collected by the water sampling container 40. For this reason, after collecting the groundwater 2 and pulling it up to the ground, if the lid member 22 is removed and the sampling container 40 is taken out, the groundwater 2 in the sampling container 40 is analyzed as it is without transferring the groundwater to another container. It can be used to save the hassle of transferring groundwater.

  Furthermore, since the present invention does not require a mechanism for reliably opening and closing the water sampling hole 21, a simple configuration can be achieved, and the manufacturing cost can be reduced thereby.

<Embodiment 2>
Although Embodiment 1 demonstrated the case where the groundwater 2 was extract | collected using the single water sampler 10, you may extract | collect groundwater at once with a some water sampler.

  FIG. 9 is a schematic diagram illustrating an aspect of using the water sampler according to the second embodiment. In addition, the same code | symbol is attached | subjected to the same thing as Embodiment 1, and the overlapping description is abbreviate | omitted. As shown in the drawing, a plurality of water sampling devices 10 are attached to the wire 3 at predetermined intervals. The urging force by the springs 34 is adjusted so that the check valves 30 (see FIG. 2) of these water sampling devices 10 are opened according to the depth of groundwater to be collected by each water sampling device 10. By dropping such a series of water sampling devices 10 into the groundwater 2, the groundwater at each depth can be sampled into each water sampling device 10 at a time. As a result, groundwater can be collected efficiently at a plurality of different depths.

In this collection, first, the wire 3 is slowly extended, and a series of water sampling devices 10 are poured into the ground water 2 until reaching a predetermined depth. This is to prevent the groundwater 2 from being disturbed and stirred as much as each water sampler 10 advances toward the bottom of the water. Then, the wire 3 is extended at a stretch and each water sampling device 10 is made to reach a predetermined depth. At this time, turbulence and agitation of the groundwater 2 may occur due to the progress of the water sampler 10, but each water sampler 10 reaches a predetermined depth, the check valve 30 opens, and the groundwater 2 enters the storage unit 23. As soon as the check valve 30 is introduced, the check valve 30 is closed, so that it is not necessary to be substantially affected by the disturbance and stirring. Thus, the groundwater 2 can be sampled without being affected by the disturbance or agitation of the groundwater 2 by introducing the series of water sampling devices 10 into the excavation hole 1.

<Other embodiments>
In the present embodiment, as the purpose of collecting the groundwater 2, the case where the influence of carbon dioxide on the environment when carbon dioxide is stored underground has been described, but of course the invention is not limited to this. Absent. For example, the present invention can also be applied when investigating the situation of groundwater pollution.

  FIG. 10 is a conceptual diagram illustrating a case where the state of water pollution is investigated by collecting groundwater by the water sampler according to the present embodiment. In addition, the same code | symbol is attached | subjected to the same thing as Embodiment 1, and the overlapping description is abbreviate | omitted. As shown in the drawing, the water sampler 10 is used to sample water at a predetermined depth of the groundwater 2 in the two excavation holes 1A and 1B. Reference numerals 100, 101 </ b> A, and 101 </ b> B in FIG.

  For example, when water is sampled at each of the water sampling points 100, 101A, and 101B, the groundwater sampled at the two water sampling points 101A and 101B is found to have a high concentration of the contaminant 200. From this, it can also be estimated that the pollutant 200 on the ground is diffusing along the diffusion path 201 passing through the vicinity of the depth of the water sampling point 101A and the depth of the water sampling point 101B. Such estimation is also realized by the fact that the water sampler 10 according to the present invention can collect groundwater at a predetermined depth.

  Of course, not only the investigation of the situation of water pollution, but also when collecting high-level waste in the ground and disposing of it, the purpose of collecting groundwater to select an appropriate place for disposal or other groundwater sampling The water sampler according to the present invention can also be used for the survey according to the above.

  The present invention can be used in an industrial field in which water is collected for various research purposes and analysis of the water is performed.

DESCRIPTION OF SYMBOLS 1, 1A, 1B Excavation hole 2 Ground water 3 Wire 10, 10A-D Water sampling device 20, 20A Container 21, 21A Water sampling hole 23 Storage part 30 Check valve 30A Plug member 40 Water sampling container 50 Water level meter

Claims (5)

A container having a water sampling hole that is a flow path that is suspended in water by a rope and introduces water from the outside to the inside;
A valve body for opening and closing the water sampling hole of the container;
A water level gauge provided outside the container ;
The flow path and a coupler formed with a water intake portion for taking water from the outside into the flow path ,
The valve body is configured to open by water pressure when the container reaches water of a predetermined depth,
The water level meter has a pair of terminals provided outside the container, and can detect that the container has landed by detecting that the terminals are short-circuited with water,
The water sampling device, wherein the terminal and the water sampling hole are connected via the flow path of the connector so that the terminal is located above the water sampling hole in the vertical direction . . The water sampler according to claim 1 ,
A water sampling device comprising: a water sampling container that is stored inside the container and stores water introduced into the container. The water sampler according to claim 2 ,
The container is formed in a long cylindrical shape, the water collection hole is formed on one end side in the direction of lifting from the water, and a detachable lid member is attached to the other end side,
The water sampling container is formed in a long shape with a diameter smaller than the diameter of the container. In the water sampler according to claim 2 or claim 3 ,
The water sampling container is accommodated in the container such that the opening thereof faces the bottom of the water. In the water sampling device according to any one of claims 1 to 4 ,
The valve body is a check valve.

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