JP2001183265A - Simultaneous multi-layer water sampler - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a simple and inexpensive water collecting method capable of collecting water of a multi-layer at the same time with good accuracy by one operation in a comparatively shallow water area such as a river, a lake, a swamp, the coast of a sea area and the like. SOLUTION: A plumb 9 is fitted to each lower end of water collecting cells 1 connected in series to designated water collecting intervals. After the plumb 9 is set on its bottom by another rope 8, a rope 7 at the upper end of the water collecting cell 1 is pulled, and the load of the plumb 9 is applied to pull a piston 3 of each water collecting cell. Thus, simultaneous multi-layer water collecting can be performed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water sampling device and a water sampling method for simultaneously and accurately collecting multiple layers of sample water for water quality analysis in relatively shallow water areas such as inner bays and lakes. .

[0002]

2. Description of the Related Art A multi-layer water sampling apparatus used for collecting water samples for water quality analysis at different depths has been used for a deep water area such as the open sea. However, these multi-layer water bottles are heavy and require a dedicated research vessel equipped with winches,
In the case where water sampling is performed at a wide water depth interval of 10 to 100 m or more, and in a shallow water area with a water depth of about 10 to 30 m such as coastal sea area, when performing multilayer water sampling with a water depth interval of about 1 to 2 m Not available. Conventionally, a single-layer water sampling device, such as a bandung type water sampling device or a Kitahara type water sampling device, which can collect sample water at a predetermined depth at one time, is used repeatedly while changing the water depth to achieve multi-layer water sampling. Has been done.

[0003]

However, multi-layer water sampling using a single-layer water sampling apparatus such as a bandung-type water sampling apparatus or a Kitahara-type water sampling apparatus has the following problems. (A) These water sampling devices can collect water only in one layer in one operation, and it is necessary to repeat the water sampling operation in order to collect multiple layers of water. However, since a relatively heavy water sampling device must be lifted and lowered with a rope, a large number of water sampling layers takes a great deal of labor and time, and multi-layer water sampling exceeding 10 layers and multi-layering in water areas where ships come and go are intense. Sampling was difficult. (B) In the sea area, the water sampler is likely to be washed away due to the tide and the flow from the incoming river. For this reason, it is difficult to determine the water depth based on the length of the rope inserted below the water surface and to collect water at the target water depth. In addition, this situation changes from moment to moment, and the degree of the effect varies with each sampling operation. Therefore, even if water is collected at small water depth intervals, the actual water depth may be reversed if the difference in water depth is small. (C) In the estuary and offshore areas, the position of the research vessel cannot be completely fixed due to the effects of wind and current.
In such a situation, if water is repeatedly sampled from the upper layer to the lower layer, the sampling point moves little by little with the lapse of time, so the difference in water quality may be due to a change in the vertical position or a change in the horizontal position. There was a fear that it was not clear whether it was due to. From the problems described above, the need for multi-layer water quality observation was recognized in coastal waters where water quality changes significantly with water depth, but it was difficult to collect water, so detailed multi-layer sampling was required. Water and analytical results have been rarely reported.

[0004] The present invention is intended to solve such a problem, and is intended to simultaneously and accurately collect multiple layers of sample water in a single operation in a relatively shallow water area such as a river, a lake, or a coastal sea area. It is an object of the present invention to provide a simple and inexpensive water sampling method that can be performed.

[0005]

Means for Solving the Problems In order to solve the above problems, the inventors of the present invention focused on a commercially available synthetic resin syringe. That is, the above-mentioned syringes are arranged in a line, and a number of syringes are sequentially connected in series with a rope, such as a cylinder of the first syringe, a piston of the second syringe, a cylinder of the second syringe, and a piston of the third syringe. By pulling the ropes of the first syringe piston and the last syringe cylinder in opposite directions, eventually all pistons are pulled, and each syringe is placed underwater to perform the same operation. I realized that it would be possible to collect sample water for each layer if I did. However, when trying to make the above water dispenser with a commercially available syringe, the cylinder and piston are:
There is a problem that there is no portion where the rope can be directly connected and that the piston eventually comes off the cylinder when the rope is pulled. For this purpose, a cylinder and piston are provided with a part where a rope can be connected, and furthermore, when a certain amount of sample water is sucked into the cylinder, the piston stops sliding and a syringe mechanism with a stopper mechanism that prevents the piston from coming off the cylinder. The problem was solved by devising a cell.

[0006] As a method of pulling the ropes at both ends of the water collection cells connected in series, the rope of the cylinder of the lowermost water collection cell is connected to the weight, and the rope at the other end on the water surface is pulled up. The problem was solved by drawing the sample water into the cylinder by pulling the piston of each water sampling cell.
However, if the weight is directly lowered with the rope of the water sampling cell, the piston will be pulled and the water will be sucked before the water sampling cell is arranged to the predetermined water sampling position. In addition to the chain of water cells, another rope is connected, and a weight is suspended by the rope and lowered to the sea floor. At that time, it is drawn into the weight and sinks into the water from the lower water sampling cell, but the water sampling cells are sequentially introduced into the water so that tension is not applied to the rope connected to the water sampling cell, and the weight is For the first time after landing, pulling the rope on the water sampling cell side and applying tension between the cylinder and piston of each water sampling cell enabled simultaneous water sampling in multiple layers.

[0007]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a water sampling cell according to an embodiment of the present invention; FIG.
A method for simultaneous multi-layer water sampling using these water sampling cells will be described based on embodiments with reference to the drawings.

FIG. 1 is a perspective view of a water sampling cell 1 having a cylinder 2 and a piston 3 having the same structure as a commercially available synthetic resin syringe.
It consists of. FIG. 1 shows a state of a water sampling cell in which water is completely drawn by fully drawing a piston. And FIG.
FIG. 2 is an exploded perspective view of the water sampling cell 1 shown in FIG.

The cylinder 2 is made of synthetic resin, and a finger hook 2d is provided outside the opening at the upper end of the cylinder to press the piston with a finger to discharge the sample water from the inside of the cylinder. A water pipe 2c for taking in sample water from outside and a rope connection hole 2b are provided. In addition, in order to attach a commercially available disposable type filter unit to the water sampling cell and to immediately filter the sample water on site, the shape of the water pipe 2c is a commercially available syringe and a luer tip or luer lock type. .

The piston 3 is also made of a synthetic resin, and has a cross-shaped shaft in order to prevent the occurrence of buoyancy due to the trapping of air. A rubber seal 3b is provided at the lower end of the piston.
Is provided to seal the inside 2f of the cylinder 2 with liquid, and a rope connection hole 3c is provided in the disk-shaped piston head 3a.

A stopper mounting hole 2e is provided on both sides of the finger hook 2d of the cylinder, and a stopper mounting hole 3d is provided on both sides of the piston head 3a.

The stopper 4 is composed of a stopper thread 4b and hooks 4a at both ends. The stopper 4 is connected to the stopper mounting holes 2e and 3d of the cylinder and the piston by the hook 4a to prevent the piston 3 from being detached from the cylinder 2. . Further, the amount of water taken can be adjusted by changing the length of the stopper thread 4b.

As for the stopper, in addition to the embodiment shown in FIGS. 1 and 2, a cylinder part 6 shown in FIG.

FIG. 3 shows components for making a water sampling cell by attaching to a commercially available synthetic resin syringe, and FIG. 4 shows a method of attaching the components.

The piston part 5 is attached to the piston head of a commercially available synthetic resin syringe to provide a rope connection hole 5a. As shown in FIG. 4A, two piston parts are used. 5, the piston head 3a and the piston shaft are fitted into the T-shaped notch 5b.
As shown in (B), two parts are used in close contact.

As shown in FIG. 4 (B), the cylinder part 6 is fitted into the cylinder 1 of a commercially available synthetic resin syringe, provided with a rope connection hole 6a, and provided with a projection 6b inserted inside the cylinder. The purpose of this is to limit the sliding range of the piston and add a stopper function, and the amount of water taken can be adjusted by the length of the projection 6b. In mounting, first, the piston 3 is fitted into the cylinder 2 halfway. Next, the axis of the cross-shaped piston 3 is diagonally sandwiched between the protrusions 6b on both sides of the cylinder component 6. The cylinder part 6 is rotated to position the cut 6c in two directions where the finger hook 2d of the cylinder 2 is narrow, and the cylinder part 6 is pushed into the cylinder. When the cylinder part 6 is fully pushed, the cylinder part 6 is rotated at a right angle, and the notch 6d is fixed so that the wide part of the finger hook 2d is bitten by the notch 6d. When the mounting of the cylinder component 6 is completed, a rubber band 6e is applied to prevent the wobble of the cylinder bottom 2a.

The ropes 7 used to connect the water sampling cells 1 in series are provided with hooks 7a at both ends to facilitate attachment / detachment so that it is possible to cope with a change in water depth interval depending on a point.

Next, an actual water sampling method will be described with reference to a schematic diagram shown in FIG. The water sampling cell 1 is connected in series with a rope 7 corresponding to the water sampling interval, and the terminal rope 7 is returned to the weight 9 via a return 10. The rope 10 for hanging a weight is also connected to the return 10. After starting the water sampling operation, weight 9
As shown in FIG. 5 (A), the weight 9
Is gradually lowered into the water with a hanging rope 8, and at the same time, a sampling cell connected in series with the rope 7 is
The water is taken into the water in order from the lowermost water sampling cell 1 connected to the water collecting cell 1, and the water sampling cell 1 is pulled by the weight 9 and sinks in the water. At this time, the rope 7 on the water sampling cell side is slackened so that the weight of the weight 9 is not applied on the way and water is sucked into the cylinder.

When the weight 9 has landed, as shown in FIG. 5 (B), the weight hanging rope 8 is fixed as it is, and the rope 7 connecting the water sampling cells is finely moved up and down for 1 to 2 minutes. Is applied between the cylinder and the piston of the water sampling cell of each layer, and the sample water is sucked into the water sampling cell.

If it is considered that the sample water has been sucked into all of the water sampling cells, the weight 9 is suspended again and the ropes 8 are lifted, as shown in FIG. 7 is also pulled up and collected on board in order from the upper water sampling cell.

[0021]

FIG. 6 shows the results of measuring the vertical distribution of nutrient concentration in water by performing multi-layer water sampling in Tokyo Bay using the present invention. At this point where the total water depth was about 25 m, water sampling was performed at a water depth interval of about 1 m, but the time required for water sampling was within 15 minutes. Also, as shown in FIG. 6, nitrate nitrogen (A) obtained by analyzing a sample water sample,
The vertical concentration distributions of nitrite nitrogen (B), ammonia nitrogen (C), and phosphoric acid phosphorus (D) vary relatively smoothly with water depth, so multi-layer sampling can be performed with high accuracy. Probably done.

[0022]

According to the present invention, the following effects can be obtained. Multi-layer water sampling at a narrow water depth interval of about 1 m, which was difficult in the past, is possible, and it is possible to easily change the water sampling interval depending on a point.

Even if the observation vessel moves due to the wind or the like, since multiple layers of sample water are sampled almost simultaneously, highly accurate sampling can be performed without being affected by changes in the position of the observation vessel. The required time is very short regardless of the number of sampling layers. For this reason, multi-layer water sampling can be performed even in a sea area where time is limited due to navigation of a ship or the like.

[0024] A water supply operation is very simple without requiring a power source or the like for water collection.

[0025] The water dispenser can be manufactured very inexpensively.

By capping the water pipe for sucking the sample water, the sample water can be brought back to the laboratory as a container.

By attaching a commercially available disposable filter unit to the water pipe, a filtered sample can be obtained immediately on site.

By arranging a plurality of water sampling cells connected in series in a river or a lake with a rope in a horizontal line and pulling them from both ends, the present invention can also be applied to simultaneous water sampling in the horizontal direction.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of a water sampling cell.

FIG. 2 is an exploded perspective view showing an embodiment of a water sampling cell.

FIG. 3 is a perspective view showing an embodiment of a part for preparing a water sampling cell using a commercially available syringe. (A) Piston parts (B) Cylinder parts

FIG. 4 is a perspective view showing a mounting method of a component for preparing a water sampling cell and a state at the time of completion. (A) Perspective view showing a process of attaching parts for a piston (B) Perspective view of a water sampling cell completed by attaching parts

FIG. 5 is a schematic diagram showing a water sampling procedure. (A) Procedure until the weight reaches the bottom (B) Procedure for collecting the sample water in the water sampling cell (C) Procedure for collecting the collected sample water

Fig. 6 Observation results using this water sampling device (A) Vertical concentration distribution map of nitrate nitrogen (B) Vertical concentration distribution map of nitrite nitrogen (C) Vertical concentration distribution map of ammonia nitrogen (D) Vertical concentration distribution map of phosphoric acid phosphorus

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sampling cell 2 Cylinder 2a Cylinder bottom 2b Rope connection hole 2c Water passage 2d Finger hook portion 2e Stopper mounting hole 2f Liquid seal portion 3 Piston 3a Piston head 3b Seal portion 3c Rope connection hole 3d Stopper mounting hole 4 Stopper 4a Hook 4b Stopper thread 5 Piston part 5a Rope connection hole 5b Piston fitting part 6 Cylinder part 6a Rope connection hole 6b Projection part 6c Cut part 6d Cut part 6e Rubber band 7 Rope for connecting water sampling cell 8 Rope for hanging weight 9 Return from weight 10

Claims (3)

[Claims] 1. A syringe type container comprising a cylinder (2) and a piston (3) fitted in the cylinder and slidable in the axial direction, wherein the cylinder bottom (2a) and the piston head (3) are provided.
a) is provided with rope connection holes (2b, 3c),
Further, a water sampling cell (1) configured so that the sliding distance of the piston (3) is kept constant by the stopper (4) and the piston (3) is not separated from the cylinder (2). 2. A piston (3) for a commercially available synthetic resin syringe.
Claim 1 by being mounted on the cylinder and the cylinder (2).
Mounting parts (5, 6) for producing a water sampling cell (1) having the function of (1). 3. A cylinder (2) of a water sampling cell (1) according to claim 1, wherein a plurality of pistons (3) are pushed in.
The piston (3) and the piston (3) are interconnected by a rope (7) to form a serial chain of water sampling cells, and the cylinder (2) of the water sampling cell for the lowermost layer is connected to the weight (9) by a rope. (B) A hanging rope (8) is also connected to the weight. (C) The weight (9) is lowered into the water little by little with the hanging rope (8), and at the same time, the water sampling cells are sequentially arranged from the lower water sampling cell (1) connected to the weight (9). The rope (7) connecting the spaces is put into the water without applying a load. (D) When the weight (9) has landed, pull the rope (7) connecting the water sampling cell (1) and pull the weight (9) to each water sampling cell (1).
Is applied, and sample water is sucked into each water sampling cell (2f). (E) The weight (9) is lifted again by the above-mentioned hanging rope (8), and the weight (9) is sequentially collected from the upper water sampling cell (1). A water sampling method performed as described above.