KR102178099B1 - Precision sampling device for microplastic analysis in seawater - Google Patents

Abstract

The present invention relates to a precision sampling device for microplastics in seawater, which can separate microplastics from a predetermined amount of seawater for analysis of the content and type of microplastics contained in seawater and can concentrate the microplastics together with a small amount of seawater. More specifically, a sampling net capable of filtering out microplastics while discharging seawater is disposed on a lower part of a seawater storage container capable of introducing and storing a predetermined amount of seawater, a concentration cylinder for storing a seawater sample in which the microplastics are concentrated by the sampling net is connected to and installed in a bottom opening of the sampling net, and a stopper and a discharge valve are respectively installed on a funnel part of the bottom of the seawater storage container and in the discharge port of the bottom of the concentration cylinder. In addition, the seawater storage container and the sampling net can be disposed in a stationary manner, respectively, on an inner side of an upper portion of and an inner side of a central portion of a base frame, which is a rectangular parallelepiped frame structure of a predetermined height. Therefore, only a simple operation of feeding and storing a predetermined amount of seawater in the inside of the seawater storage container and removing the stopper of the seawater storage container from the funnel part makes it possible to easily obtain a seawater sample enriched with the microplastics by using the concentration cylinder at the lower end of the sampling net. Also, the installation of the seawater storage container and the sampling net for seawater sampling and the separation of the seawater storage container and the sampling net used for seawater sampling can be performed very quickly and easily.

Description

Precision sampling device for microplastic analysis in seawater

The present invention relates to a sampling device capable of separating microplastics from a certain amount of seawater samples and concentrating them together with a small amount of seawater for analysis of the quantity, size, and type of microplastics contained in water samples including seawater. will be. This device puts a certain amount of seawater into and stores a certain amount of seawater inside the seawater storage tank, with seawater storage tanks and funnel-type sampling networks arranged at the inner upper and inner center of the base frame made of a rectangular parallelepiped frame structure of a predetermined height. By simply removing the stopper inside the funnel provided on the bottom of the seawater storage tank or opening the valve installed in the discharge pipe at the bottom of the funnel, you can easily store the seawater samples enriched with fine plastics with the concentration cylinder at the bottom of the sampling network. I did it.

In general, microplastic refers to small pieces of plastic less than 5mm, some of which are decomposed or pulverized into small size due to corrosion or various collisions caused by corrosion or various collisions of plastic waste discarded in the ocean or river, and the rest are exfoliating agents or cleansers for skin. Or, something made of very small-sized particles from the production stage, such as those included in products such as functional toothpaste for the scaling effect, leaked into the environment. The resulting microplastics are not filtered even in the sewage treatment plant and flow into the sea through rivers or rivers.

Microplastics adsorb and transport not only toxic persistent organic pollutants (POPs), such as PCBs (polychlorinated biphenyls), dioxin, and DDT (dichloro-diphenyl-trichloroethane), but also endocrine disruptors such as phthalates and bisphenols. Because they can be released, they are also called death grains, which have serious effects on rivers, marine environments and various ecosystems. They are continuously accumulated in the body of living organisms along the food chain and not only finally consumed by humans in the form of food, but also can be included in tap water that has undergone purification, and through this process, microplastics are consumed for a long time. Therefore, if a large amount of microplastics accumulate in the body, it may cause carcinogenesis or cause health damage due to environmental hormones. In recent years, several countries have banned the production of products such as cosmetics, face wash and toothpaste containing microplastics.

As described above, the area where environmental pollution and ecosystem destruction by microplastics are most seriously concerned is the coastal sea area adjacent to the inland, so in order to determine to what level the pollution of the coastal sea area by microplastics has progressed, ), it is necessary to collect a seawater sample containing microplastics and analyze the content and type of microplastics. To this end, a fine plastic collecting device that can filter and collect fine plastic particles of 1mm to 5mm size from the surface water of the sea in the process of being towed along the sea level by the power of the ship while being suspended from the stern of the ship It is known as described in Registration Patent No. 10-2100852 (announcement date: April 14, 2020).

The conventional microplastic collecting device as described above includes a second filter having a mesh wall shape with open upper and lower portions, a first filter disposed on the front side of the second filter so as to surround the outer surface of the second filter, Consisting of a third filter inserted into the interior of the second filter to collect fine plastic particles, and an upper plate and a lower plate respectively sealing upper and lower surfaces of the first filter, the second filter, and the third filter. And, the third filter includes at least one X-ray generator capable of irradiating X-rays in a state in which a battery is embedded, and electrically coupled with the microplastic particles reacted by the X-rays. It is made by including a number of plastic beads (Beads), the collection device is installed in connection with the stern of the ship by a towing rope or the like.

However, in the conventional microplastic collecting device as described above, in the process of towing the collecting device along the sea level using a ship, the ocean surface water in a state in which large floating objects are filtered by the first filter is transferred from the first filter to the second filter. And then, through the second filter, only fine plastics having a size of 1 mm to 5 mm are allowed to pass together with seawater, and then fine plastic beads constituting the third filter are formed using the X-ray generator of the third filter. Since the collection method of attaching plastics was applied, it was very difficult to easily and accurately obtain seawater samples containing microplastics over various depths of water.

More specifically, it is possible to collect and analyze only microplastics existing in the surface water of the ocean by the conventional microplastic collecting device, and it is impossible to collect and analyze microplastics existing in the middle and bottom depths. When the operation of the X-ray generator is stopped, the microplastic is separated from the surface of the plastic beads (third filter), and the upper or lower plate is separated and the microplastic is taken out together with the plastic beads. In addition, there was a problem that requires a cumbersome work of separating the microplastic and the plastic beads again, and the loss of the microplastic frequently occurs during this process, causing a problem that hinders the accurate analysis work.

In addition, the conventional microplastic collecting device focuses on a wide range of marine surface water while moving the ship over a relatively large area of water, and a small amount of seawater samples enriched with microplastics are evenly distributed over various depths. In addition to making it easy to obtain, there was a problem that it became a very unsuitable method in terms of analyzing the sample more quickly and accurately.In particular, for in-depth analysis work in a laboratory unit, a specific amount of seawater, that is, quantitative seawater It is necessary to accurately concentrate and store microplastics for each standard unit of (fixed seawater), but conventional collection devices have a problem in that they cannot quantify the amount of seawater that is the basis for calculating the concentration (content) of microplastics. there was.

Korean Patent Registration No. 10-2100852

The present invention was conceived to solve the conventional problems as described above, in a state in which a seawater storage tank and a funnel-type sampling network are respectively arranged in the inner upper and inner center of the base frame made of a rectangular parallelepiped frame structure having a predetermined height, After injecting and storing a certain amount of seawater into the inside of the seawater storage container, it is necessary to remove the stopper inside the funnel part provided on the bottom of the seawater storage container or open the valve installed in the discharge pipe at the bottom of the funnel part. Seawater samples enriched with microplastics can be easily stored by cylinders, and seawater samples for microplastic analysis can be obtained by dividing by depth of seawater from seawater pumped from various depths ranging from surface water to middle and bottom depths. The seawater storage tank enables more accurate and in-depth analysis by quantifying the amount of seawater input, which is the standard for calculating the concentration (content) of microplastics, and installation of a seawater storage passage and sampling network for seawater sampling. The main technical task is to provide a precision sampling device for microplastics in seawater that can be performed very quickly and easily, as well as separating the seawater reservoir and the sampling network used for seawater sampling.

In addition, the present invention forms a mark line as a reference line for the quantitative injection of seawater on the upper inner circumferential surface of the seawater reservoir, so that the convenience according to the quantitative injection of seawater can be promoted, and corresponds to the direct upper part of the funnel. With the flange-type auxiliary tray connected and installed along the lower circumference of the seawater reservoir, make the upper side of the seawater reservoir become a quantitative reference line, or a horizontal overflow slit at the position of the quantitative reference line on the upper circumference of the seawater reservoir. By forming an incision, the amount of seawater equal to the amount of excess input flows to the auxiliary tray side, so that the quantity is automatically set, so that the quantitative injection of seawater can be performed more easily and accurately without unnecessary external pollution, and the overflow slit is formed. By forming the lower side of the incision as an inclined cutting surface, it is possible to reduce quantitative errors due to surface tension, and by placing a balance tank capable of temporarily storing seawater passing through the sampling network at the lower inner side of the base frame, Another technical task is to provide a fine plastic precision sampling device in seawater that can support a relatively narrow base frame more stably together with a seawater reservoir.

As a means for solving the above technical problem, the fine plastic precision sampling device in seawater according to the present invention includes a base frame made of a rectangular parallelepiped frame structure having a predetermined height by a vertical frame and a horizontal frame, and the base frame A sampling network for filtering microplastics in a funnel shape disposed in a vertical direction over a predetermined height in the inner space of the base frame corresponding to the bottom of the seawater storage passage and the seawater storage passage inserted and seated in the upper part of the seawater storage tank, and the sampling network A concentrating cylinder connected to the lower opening of the condensation cylinder, and a discharge valve installed in the discharge pipe of the bottom of the concentrating cylinder, and a pedestal for supporting the seawater reservoir from the lower part of the base frame and the upper edge of the sampling network Each ring-shaped holder to be mounted is provided, and the bottom surface of the seawater reservoir is formed as a funnel, while a discharge pipe is connected to the lower end of the funnel, and leakage of seawater is prevented inside the bottom of the funnel part of the seawater reservoir. The stopper is installed to be detachably fitted, and a stopper string extending to the outside of the seawater reservoir is connected to the stopper.

In a more preferred embodiment, the seawater storage tank is manufactured in the shape of a cylinder or square cylinder with an open top surface, and an overflow slit for quantitative injection-type storage of seawater is arranged at a constant interval along the upper circumference of the seawater storage tank. A flange-shaped auxiliary tray with a "b"-shaped cross-section for temporary storage of seawater flowing through the overflow slit is formed along the lower circumference of the seawater storage tank corresponding to the direct upper part of the funnel. It is characterized in that the connection is installed, wherein the overflow slit is formed as an inclined cutting surface in which the lower side of the incision hole is inclined downward in the inner or outward direction of the seawater reservoir, while the upper end of the inclined cutting surface is a sharp upper tip. It is characterized in that it is formed, and in another embodiment, the top surface of the seawater storage tank in which the auxiliary tray is installed is a reference line for quantitative seawater input, or the upper inner periphery of the seawater storage tank without the auxiliary tray is installed. It is characterized in that a mark line as a reference line for quantitative injection is provided.

In addition, a balance tank for temporarily storing seawater flowing down through a sampling network is installed inside the lower part of the base frame, and an overflow pipe and a drain valve to which a drain hose is connected are provided at the upper and lower sides of the balance tank. Drainage pipes are respectively connected and installed, and the seawater storage container and stopper, and the concentration cylinder and discharge valve are made of stainless steel, and the seawater storage container is discharged onto the discharge pipe at the bottom of the funnel instead of the stopper. It is characterized in that a valve is installed, characterized in that the discharge valve of the seawater reservoir is also made of stainless steel, and a transport handle is connected to the outer surface of the center of the seawater reservoir, and the seawater reservoir The stopper has an upper body corresponding to the lower inner circumferential surface of the funnel part, and a lower body corresponding to the upper inner circumferential surface of the discharge pipe, while a waterproof pad is attached to the outer circumferential surface of the upper body, and the upper body of the stopper The upper surface is characterized in that it is formed with a hemispherical spherical portion, and the upper left, right or upper front and rear sides of the base frame are characterized in that a "∧" shaped crane hanger frame is connected to each other.

According to the present invention as described above, in a state in which a seawater storage tank is placed on the inner upper part of the base frame that becomes a frame structure of a predetermined height, and then a certain amount of seawater is input and stored into the seawater storage tank, on the bottom surface of the seawater storage tank. Seawater can be passed (free fall) through the funnel-type sampling network installed in the center of the base frame by removing the stopper inside the provided funnel or opening the valve installed in the discharge pipe at the bottom of the funnel. It provides the effect of automatically inflowing and storing microplastics contained in the microplastics into the concentration cylinder at the bottom of the sampling network together with a small amount of seawater while being filtered by the sampling network.Through this, it is possible to obtain a seawater sample enriched with microplastics very easily. Provides a possible effect.

Particularly, with the sampling device according to the present invention installed on the ship, a seawater sample for microplastic analysis with seawater pumped from various depths requiring analysis from the surface water to the middle and bottom layers using a seawater pump, etc. As it can be collected immediately at the site, it provides the effect of securing a wide range of seawater samples covering various water bodies and depths within a relatively short time, and at the same time, it is a standard for calculating the concentration (content) of microplastics using a seawater reservoir. By quantifying the amount of seawater input, more accurate and in-depth analysis is possible, and the installation work of the seawater storage passage and sampling network for seawater sampling and the separation of the seawater storage passage and the sampling network used for seawater sampling are also available. It provides an effect that can be performed very quickly and easily by using the base frame's pedestal and cradle.

In addition, by forming a mark line as a quantitative reference line on the upper inner circumferential surface of the seawater storage tank, it provides the effect of promoting the convenience of the quantitative input operation of seawater, and the auxiliary tray is installed on the lower side of the seawater storage tank. , If the upper side of the seawater reservoir is used as the quantitative reference line, or if the overflow slit is cut and formed in accordance with the position of the quantitative reference line around the upper circumference of the seawater reservoir, the amount of seawater injected into the inside of the seawater reservoir exceeds the quantity. It is possible to flow down to the auxiliary tray through the top surface or overflow slit of the seawater reservoir, and through this, the amount of seawater stored in the seawater reservoir is automatically set according to the quantity, making the quantitative input of seawater even easier. It provides an effect that can be performed accurately.

In particular, since the total amount of seawater flowing to the outer surface of the seawater reservoir does not flow into the sampling network and is guided to the inside of the auxiliary tray, unnecessary external contamination of seawater, which may cause analysis errors, can be prevented. By forming the lower side of the incision hole forming the flow slit into a sharp inclined cutting surface, it provides an effect that can further improve the accuracy and reliability of the analysis results of microplastics using seawater samples by reducing quantitative errors due to surface tension. And, as a balance tank for temporarily storing seawater that has passed through a sampling network is placed in the lower part of the base frame, the base frame, which is relatively narrow in width compared to its height, is stably supported together with the seawater storage container, thereby rolling and pitching. This is to provide a very useful effect, such as being able to use the sampling device more safely in a ship where fluctuations of the back frequently occur.

1 is an exploded perspective view showing a fine plastic fine sampling device in seawater according to the present invention.
Figure 2 is a front cross-sectional view of the combined state of Figure 1;
Figure 3 is a plan view of Figure 2;
4 is a front cross-sectional view of a seawater reservoir used in the sampling device of the present invention.
5 and 6 are enlarged cross-sectional views of essential parts of the overflow slit provided in the seawater reservoir.
7 and 8 is a front cross-sectional view showing the cap of the seawater storage tank.
9 is an exploded perspective view of a main part of a sampling device according to another embodiment of the present invention.
Figure 10 is a front view of the seawater storage tank shown in Figure 9;
11 and 12 are front cross-sectional views showing another application example of the seawater reservoir.

Hereinafter, the present invention for achieving the above object will be described in detail with reference to the accompanying drawings.

The fine plastic precision sampling apparatus in seawater according to the present invention is manufactured as a rectangular parallelepiped-shaped frame structure having a predetermined height by a vertical frame (1a) and a horizontal frame (1b), as shown in FIGS. 1 to 4. In the inner space of the base frame (1), the seawater reservoir (2) that is inserted and seated in the upper portion of the base frame (1), and the base frame (1) corresponding to the lower portion of the seawater reservoir (2) A funnel-shaped microplastic filtration sampling network (6) arranged vertically across the height, a concentration cylinder (8) connected to the lower opening of the sampling network (6), and a bottom surface of the concentration cylinder (8) It comprises a discharge valve (8b) installed in the discharge pipe (8a) of.

In the drawing, the base frame (1) is a rectangular frame structure by four horizontal frames (1b) on the upper side of the four vertical frames (1a) is connected and installed over two places, and at the bottom of the upper horizontal frame (1b). In the upper inner side of the corresponding base frame (1), a pedestal (1c) supporting the seawater reservoir (2) from the bottom is connected to each of the vertical frames (1a) to form a square frame structure, and the pedestal (1c) A ring-shaped cradle 9 for mounting the sampling net 6 is disposed in the inner central portion of the rectangular frame structure by four horizontal frames 1b disposed at the bottom, and the cradle 9 is radial (drawing It is connected to the adjacent horizontal frame (1b) by the support ribs (9a) of the upper 4).

In the accompanying drawings, a rectangular parallelepiped structure suitable for arranging the seawater storage tank 2 and the sampling network 6 at regular intervals along the vertical direction is shown as a representative example of the base frame 1, but the seawater storage tank 2 It should be noted that the base frame 1 can be manufactured in various shapes other than those shown in the drawings under conditions that do not interfere with the arrangement work of) and the sampling network 6, according to the present invention. Considering that the sampling device 10 is mainly used in ships, it is desirable to install a non-slip toe made of rubber or synthetic resin material to prevent slipping at the bottom of each vertical frame 1a. Accordingly, a wheel with a locking function may be installed at the bottom of each vertical frame 1a.

In addition, the base frame (1) can be carried out more easily and safely without damage to the base frame (1) by using a ship crane or the like to put the base frame (1) on land to a ship or from ship to land. ) Of the upper left and right horizontal frames (1b) or the upper front and rear horizontal frames (1b) on each of the hanger frames (Hanger frame) 16 may be connected and installed, the hanger frame 16 is "∧" While making it a ruler-shaped frame structure, it is preferable to install a connecting chain (16a) provided with a hook (16b) on the upper end of each hanger frame (16), and the pedestal (1c) and the cradle (9) and The base frame 1 including the hanger frame 16 is preferably made of a stainless steel material having excellent strength and corrosion resistance.

The seawater reservoir 2 constituting the sampling device 10 of the present invention is made of a cylindrical tank with an open top surface, and the bottom surface is formed with a funnel part 3 of a shape that becomes narrower toward the lower side. And, while the discharge pipe (3a) is connected and installed at the lower end of the funnel part (3), the stopper (4) to prevent leakage of seawater is installed detachably inside the lower end of the funnel part (3), The stopper 4 is connected with a stopper string 5 extending to the outside of the seawater reservoir 2, and a handle 5a is connected to the end of the stopper line 5.

As described above, the reason why the stopper line 5 has a length extending to the outside of the seawater reservoir 2 is to discharge (free fall) the seawater stored in the seawater reservoir 2 to the sampling network 6 side. When removing the stopper (4) from the part (3), it is to prevent unnecessary external pollution by preventing the operator's hand from contacting the seawater stored in the seawater reservoir (2), and opening and closing the discharge pipe (3a) of the seawater reservoir (2). Of course, it is possible to perform the opening and closing operation of the discharge pipe 3a with a valve mechanism by installing a valve mechanism on the discharge pipe 3a without using the stopper 4 for the operation.

As an optimal embodiment of the seawater reservoir 2 that can be applied to the present invention, a flange of a "b"-shaped cross section along the lower circumferential portion of the seawater reservoir 2 corresponding to the direct upper part of the funnel part 3 A sub-tray 12 is connected and installed, and an overflow slit 11 in the form of a long hole is placed along the upper circumference of the seawater reservoir 2 at a constant interval. It is placed and formed horizontally, and the location where the overflow slit 11 is formed is a quantity of seawater that is the basis for calculating the concentration (content) of the microplastic, for example, 50L (liter) or 100L (liter). It becomes a marker indicating the storage line, and the auxiliary tray 12 has a dimension capable of stably storing a quantity of the amount of the contents from the overflow slit 11 to the upper end of the seawater storage tank 2 It can be seen that it is enough to make it.

Through the structural improvement as described above, even if the seawater injected into the seawater storage tank 2 exceeds a predetermined amount, the amount of the excess water goes through the overflow slit 11 to the inside of the auxiliary tray 12. As it flows down (see Fig. 4), the amount of seawater stored in the seawater reservoir (2) is automatically set according to a preset quantity. To this end, the internal volume of the seawater reservoir (2) including the funnel (3) is It goes without saying that the overflow slit 11 must be formed according to the position (height) to be filled by the amount required by seawater by accurately calculating it.

In the drawing, a total of four overflow slits 11 having a predetermined length are arranged along the circumferential direction of the seawater reservoir 2 with an angle range of 90 degrees, but the cut length, number and arrangement of the overflow slits 11 The state can be arbitrarily changed, and the incision (gap) interval of the overflow slit 11 is preferably about 1 to 2 mm to suppress the outflow of microplastics, and the above mentioned above when the seawater reservoir 2 is seated. It is preferable that the bottom edge of the auxiliary tray 12 is placed on the pedestal (1c) of the base frame (1), and a transport handle (2a) is connected and installed on the left and right outer surfaces of the seawater reservoir (2). Preferably, the handle (2a) is prevented from protruding outward from the auxiliary tray 12 so that the operation of seating the seawater reservoir (2) on the base frame (1) is hindered by the handle (2a). Do not receive.

In addition, as shown in FIGS. 5 and 6, the lower side of the incision hole provided by the overflow slit 11 is inclined downward toward the inner side (FIG. 5) or the outer side (FIG. 6) of the seawater reservoir 2. Is formed as an inclined cutting surface (11a), and when the upper end of the inclined cutting surface (11a) forms a sharp upper tip (11b), the automatic quantitative setting of seawater by the overflow slit (11) is faster In addition to being able to be performed, it provides the advantage of reducing the quantitative error due to the surface tension caused by the overflow slit 11.

In other words, if the lower side of the incision hole provided by the overflow slit 11 is formed with a sharp inclined cutting surface 11a, the surface of the seawater at the time when seawater starts to flow down through the overflow slit 11 As the frictional force (resistance of seawater discharge) can be minimized by the upper tip 11b, the amount of excess input into the seawater reservoir 2 is quickly discharged to the outside through the overflow slit 11, and at the same time, FIG. By moving the seawater storage line by the surface tension indicated by the virtual line in FIG. 6 downward by a predetermined interval (d), the actual storage line of seawater is placed on the same line with the upper tip 11b of the overflow slit 11 In other words, the amount of seawater calculated by the contents of the seawater reservoir 2 almost matches the quantity of seawater actually stored.

From the above point of view, in the case shown in FIG. 5, since the inclined cutting surface 11a is inclined in the inner direction of the seawater reservoir 2, the overflow that becomes the quantitative reference line of seawater by calculating the inner volume of the seawater reservoir 2 When determining the position of the upper tip 11b of the slit 11, the volume of the cut-out portion to form the corresponding cutting surface must also be included in the internal volume calculation, so that the form shown in FIG. 6 can be avoided in such a design trouble. It can be seen that it is more preferable to form the furnace overflow slit 11, and the structure of the overflow slit 11 shown in FIG. 6 provides an advantageous advantage in terms of suppressing unnecessary outflow of microplastics.

The sampling network 6 used in the sampling device 10 of the present invention has a size of 1mm to 5mm contained in the seawater while passing the seawater discharged (free fall) to the bottom through the discharge pipe 3a of the seawater storage tank 2 It is preferable to use a filter net made of cloth or fabric material that can be filtered out of the microplastics, and a typical example is a plankton collecting net.If necessary, a filter net made of a material other than cloth or fabric is used as a sampling net ( 6), or a sampling network 6 capable of filtering out microbeads having a size of less than 1 mm may be used depending on the target of the analysis work.

At the upper end of the sampling net 6, the upper frame 6a manufactured in the form of a circular frame using metal or plastic so that the sampling net 6 can be easily suspended on the cradle 9 of the base frame 1 ) Is preferably connected and installed, and an auxiliary ring (6b) is preferably connected to the upper border (6a) for convenience of transportation and handling of the sampling network (6), and the concentration cylinder (8) is transparent Using a connection flange (7) equipped with a connector (7a) such as a band clamper or cable tie in a plastic container, it is detachably connected to the lower opening of the sampling network (6). It is preferable to install, and extract a small amount of seawater stored together with microplastics in the concentration cylinder 8 into a seawater sample, which is an analysis sample, using a discharge valve 8b installed in the discharge pipe 8a of the bottom surface. It becomes.

Since the sampling device 10 according to the present invention is for analysis of microplastics contained in seawater, the seawater storage tank 2 and the stopper 4 and the concentration cylinder are not additionally included in the sampling process. Both the (8) and the discharge valve (8b) may be made of stainless steel. In this case, the overall load of the sampling device (10) increases, the production cost of the discharge valve (8b) increases, and the concentration cylinder (8) ), it is desirable to select a more advantageous method by considering the advantages and disadvantages at the same time, since there are several disadvantages that cannot be directly checked with the naked eye.

On the other hand, since the sampling device 10 according to the present invention has a structure in which the seawater reservoir 2 is disposed directly above the funnel-shaped sampling network 6 having a predetermined height, the width is relatively larger than the height. A narrow base frame (1) is provided, and due to this structure, the base frame (1) may easily fall together with the seawater reservoir (2) on the upper side, in particular, rolling and pitching. Considering that the sampling device 10 of the present invention is used in a ship where fluctuations are often caused, it is necessary to additionally secure its safety, and for this purpose, simply increasing the installation width of the base frame 1 is the base frame It is not preferable when considering the overall load of (1) and the convenience of the seating operation of the seawater reservoir (2).

In order to more reasonably provide safety according to the use of the sampling device 10 as described above, a balance tank 13 capable of temporary storage of seawater flowing down through the sampling network 6 is provided as a base frame ( By installing inside the lower part of 1), the sampling device 10 can be supported more stably by the weight of seawater stored in the balance tank 13, and the balance tank 13 itself is a sampling of seawater. Since it is not directly related to the work, the material itself may not be greatly restricted, but it is preferable to manufacture it in the shape of a square tank with an open top surface, preferably made of the same stainless steel material as the base frame (1). For the purpose of reducing the weight of 10), plastic materials are also possible.

In addition, by installing an overflow pipe 13b to which the drain hose 15 is connected to the upper side of the balance tank 13, even if the seawater sampling operation is continuously performed several times, it passes through the sampling network 6 It is desirable to ensure that seawater does not leak to the work site beyond the balance tank 13 and can be discharged to other spaces or to the outside of the ship. After the sampling operation is completed, the seawater stored in the balance tank 13 is removed from the outside. It is preferable to connect and install a drain pipe (13a) provided with a drain valve (14) to the lower end of the balance tank (13) so that the entire amount can be discharged to the furnace.

7 is a representative example of the stopper 4 used in the seawater storage container 2, the upper body corresponding to the inner circumferential surface of the bottom side of the funnel 3 of the seawater storage container 2, and the upper end of the discharge pipe 3a While having a lower body corresponding to the inner circumferential surface of the side, a waterproof pad (4a) is attached and installed on the outer circumferential surface of the upper body, and a connection ring (4b) for connection of the stopper line (5) is provided at the center of the upper surface of the upper body. As shown in Fig. 8, when the top surface of the upper body of the stopper 4 is formed into a hemispherical spherical part 4c, seawater is formed from the top surface of the stopper 4 in the direction of the arrow. Because it flows down easily, the operation of removing the stopper 4 from the seawater storage container 2 can be performed more easily and smoothly.

9 and 10 is a sampling device 10 according to another embodiment of the present invention, wherein the seawater reservoir 2 is manufactured in a rectangular tank shape instead of a circular tank, and the auxiliary tray 12 and The funnel part 3 is installed in the shape of a square flange and a square funnel according to the exterior of the seawater storage tank 2, and the discharge pipe 3a has a discharge valve 3b in place of the stopper 4 as described above. The bar is installed, and the rest of the configuration is made in the same manner as in the previously described embodiment.

When the seawater storage container 2 is manufactured in the shape of a square tank as described above, the seawater storage container 2 is lifted to the top of the base frame 1, and then the seawater storage container 2 is relocated to the inside of the base frame 1 Instead of laying down, the seawater reservoir 2 is inserted in a slide manner through the side of the base frame 1 (in the direction of the arrow in Fig. 9). It can be seated, and for this purpose, an inlet-type cutout at a predetermined interval so that the discharge pipe (3a) of the seawater reservoir (2) can be inserted together with the discharge valve (3b) in the pedestal (1c) of the base frame (1) ( 1d) is provided, and the discharge valve 3b of the seawater storage tank 2 may also be made of stainless steel.

11 and 12 is another application example of the seawater reservoir 2, and the top surface of the seawater reservoir 2 itself without forming the overflow slit 11 is a quantitative reference line. 12, instead of installing the auxiliary tray 12, a mark line 17 as a reference line for quantitative input of seawater along the upper inner periphery of the seawater reservoir 2 ) Is formed, and in the case of the seawater reservoir (2) shown in FIG. 12, the portion supported by the pedestal (1c) of the base frame (1) becomes the outer upper edge of the funnel (3).

Even in the case of the seawater storage tank 2 shown in FIG. 11, the automatic setting function of the seawater quantity such as the overflow slit 11 can be provided, but the top surface of the seawater storage tank 2 is the operator's hand or other surrounding objects. Since it is a part that is easily in contact with, there is a disadvantage that there is a high risk of unnecessary external pollution, and the case of the seawater storage container 2 shown in FIG. 12 can be easily manufactured with a relatively simple structure, but the storage level of seawater is marked by a mark line. (17) It is preferable to apply the seawater reservoir (2) described in the above-described optimal embodiment as possible, since it is somewhat difficult to accurately adjust the operation according to the (17).

According to the present invention having the configuration as described above, after placing the seawater storage tank 2 on the inner upper part of the base frame 1 that becomes a frame structure having a predetermined height, a certain amount of seawater is injected into the interior of the seawater storage tank 2 And in the stored state, remove the stopper (4) inside the funnel part (3) provided on the bottom of the seawater storage tank (2), or open the discharge valve (3b) installed in the discharge pipe (3a) at the bottom of the funnel part (3). As it is opened, fine plastic contained in the seawater is removed by the sampling network 6 by a simple operation of passing the seawater (free fall) through the funnel-type sampling network 6 mounted on the inner center of the base frame 1. It can be automatically introduced and stored into the concentration cylinder 8 at the bottom of the sampling network 6 along with a small amount of seawater in the filtered state, and through this, a seawater sample in which fine plastics are concentrated can be obtained very easily.

In particular, analysis of microplastics with seawater pumped from various depths requiring analysis from the surface water to the middle and bottom layers using a seawater pump, etc., with the sampling device 10 according to the present invention installed on the ship As the dissolved seawater samples can be collected immediately on site, a wide range of seawater samples covering various water bodies and depths can be secured in a relatively short time, and the concentration (content) of microplastics can be calculated using the seawater reservoir (2). A more accurate and in-depth analysis work is possible by quantifying the amount of seawater input, which is the standard for seawater sampling, and the installation work of the seawater reservoir (2) and the sampling network (6) for seawater sampling, and the seawater reservoir (2) used for seawater sampling. ) And the sampling network 6 can be separated very quickly and easily by using the pedestal (1c) and the pedestal (9) of the base frame (1).

In addition, by forming the mark line 17 as a quantitative reference line on the upper inner circumferential surface of the seawater storage tank 2, it is possible to promote convenience according to the quantitative input operation of seawater, and an auxiliary tray on the lower side of the seawater storage tank 2 When (12) is installed, the upper end of the seawater reservoir (2) is used as a quantitative reference line, or the overflow slit (11) is cut and formed according to the position of the quantitative reference line on the upper circumference of the seawater reservoir (2), Even if the seawater input into the seawater storage tank 2 exceeds the amount, the excess amount may flow down to the auxiliary tray 12 side through the top surface of the seawater storage tank 2 or the overflow slit 11, and In this way, the amount of seawater stored in the seawater storage tank 2 is automatically set according to the quantity, so that the quantitative input of seawater can be performed more easily and accurately.

In particular, since the seawater flowing down the outer surface of the seawater reservoir 2 does not flow into the sampling network 6 and is guided to the inside of the auxiliary tray 12, unnecessary external contamination of seawater that may cause analysis errors is prevented. In addition, by forming the lower side of the incision hole forming the overflow slit 11 with a sharp inclined cutting surface 11a to reduce quantitative errors due to surface tension, the accuracy of the analysis results of microplastics using seawater samples And reliability can be further improved, and by arranging a balance tank 13 in which seawater passing through the sampling network 6 is temporarily stored in the lower inside of the base frame 1, the width is relatively By stably supporting the narrow base frame 1 together with the seawater reservoir 2, it is possible to use the sampling device 10 more safely in a ship where fluctuations such as rolling and pitching frequently occur.

1: base frame 1a: vertical frame 1b: horizontal frame
1c: pedestal 1d: incision 2: seawater reservoir
2a,5a: handle 3: funnel part 3a,8a: discharge pipe
3b,8b: discharge valve 4: stopper 4a: waterproof pad
4b: connecting ring 4c: spherical part 5: stopper string
6: sampling network 6a: upper border 6b: auxiliary ring
7: connection flange 7a: connector 8: concentration cylinder
9: cradle 9a: support rib 10: sampling device
11: overflow slit 11a: inclined cutting surface 11b: upper tip
12: auxiliary tray 13: balance tank 13a: drain pipe
13b: overflow pipe 14: drain valve 15: drain hose
16: hanger frame 16a: connecting chain 16b: hook
17: mark line

Claims (13)

In the sampling device that separates the microplastic from a certain amount of seawater and concentrates it with a small amount of seawater for analysis of the microplastic contained in seawater,
The sampling device 10 includes a base frame 1 made of a rectangular parallelepiped-shaped frame structure having a predetermined height by a vertical frame 1a and a horizontal frame 1b, and the upper inner side of the base frame 1 A sampling network for microplastic filtration in the form of a funnel disposed in a vertical direction over a predetermined height in the seawater reservoir 2 to be inserted and seated in the inner space of the base frame 1 corresponding to the lower portion of the seawater reservoir 2 (6), and a concentration cylinder (8) connected to the lower opening of the sampling network (6), and a discharge valve (8b) installed in the discharge pipe (8a) of the bottom surface of the concentration cylinder (8). And
Inside the base frame (1) is provided with a pedestal (1c) for supporting the seawater reservoir (2) from the bottom and a ring-shaped holder (9) on which the upper edge (6a) of the sampling net (6) is mounted, respectively, , The bottom surface of the seawater reservoir (2) is formed with a funnel part (3), while a discharge pipe (3a) is connected and installed at the lower end of the funnel part (3), and the funnel part (3) of the seawater reservoir (2) ) A stopper (4) that prevents leakage of seawater is installed detachably inside the bottom, and a stopper (5) extending to the outside of the seawater reservoir (2) is connected and installed on the stopper (4). Fine plastic sampling device in seawater. According to claim 1, wherein the seawater reservoir (2) is manufactured in the shape of a cylinder or square cylinder with an open top surface, and overflow for quantitative injection storage of seawater along the upper circumference of the seawater reservoir (2) The slit 11 is cut in the horizontal direction at regular intervals,
A flange-type auxiliary tray with a "b" cross section for temporarily storing seawater flowing down through the overflow slit 11 along the lower circumference of the seawater storage tank 2 corresponding to the direct upper part of the funnel 3 (12) Fine plastic precision sampling device in seawater, characterized in that the connection is installed. The method of claim 2, wherein the overflow slit (11) is formed of an inclined cutting surface (11a) in which the lower side of the incision hole is inclined downwardly in the inner or outward direction of the seawater reservoir (2), and the inclined cutting surface ( The fine plastic fine sampling device in seawater, characterized in that the upper end of 11a) is formed with a sharp upper tip (11b). The method of claim 1, wherein the seawater reservoir (2) is manufactured in the shape of a cylinder or square cylinder with an open top surface, and the lower circumferential portion of the seawater reservoir (2) corresponding to the direct upper portion of the funnel (3) is Accordingly, a fine plastic precision sampling device in seawater, characterized in that a flange-type auxiliary tray 12 of a "b"-shaped cross-section for temporarily storing seawater flowing down through the top surface of the seawater storage tank 2 is connected and installed. The mark line (17) of claim 1, wherein the seawater reservoir (2) is manufactured in the shape of a cylinder or square cylinder with an open top surface, and the upper inner periphery of the seawater reservoir (2) serves as a reference line (17) for quantitative input of seawater. ) Fine plastic fine sampling device in seawater, characterized in that provided. The balance tank (13) according to any one of claims 1 to 5, wherein a balance tank (13) for temporarily storing seawater flowing down through a sampling network (6) is installed inside the lower portion of the base frame (1), and the balance tank Fine plastic precision in seawater, characterized in that the overflow pipe 13b to which the drain hose 15 is connected and the drain pipe 13a provided with the drain valve 14 are respectively connected and installed at the upper and lower sides of (13). Sampling device. According to any one of claims 1 to 5, The seawater reservoir (2), the stopper (4), the concentration cylinder (8) and the discharge valve (8b) are made of stainless steel. Microplastic precision sampling device. The method according to any one of claims 1 to 5, wherein a discharge valve (3b) is installed on the discharge pipe (3a) at the lower end of the funnel part (3) in place of the stopper (4) in the seawater reservoir (2). Fine plastic sampling device in seawater, characterized by. [10] The fine plastic fine sampling device in seawater according to claim 8, wherein the discharge valve (3b) of the seawater reservoir (2) is made of stainless steel. [6] The precision sampling device for fine plastics in seawater according to any one of claims 1 to 5, wherein a carrying handle (2a) is connected to the central outer surface of the seawater reservoir (2). The method according to any one of claims 1 to 5, wherein the stopper (4) of the seawater reservoir (2) has an upper body corresponding to the lower inner circumferential surface of the funnel part (3), and the upper inner circumferential surface of the discharge pipe (3a) While having a lower body corresponding to and, a waterproof pad (4a) is attached to the outer peripheral surface of the upper body, characterized in that the fine plastic fine sampling device in seawater. 12. The precision sampling apparatus for fine plastics in seawater according to claim 11, wherein the top surface of the upper body of the stopper (4) is formed of a hemispherical spherical portion (4c). The method according to any one of claims 1 to 5, wherein the upper left, right or upper front and rear sides of the base frame (1) are connected to each other with a "∧" shaped crane hanger frame (16). Fine plastic sampling device in seawater, characterized by.

Images