Water sample suction filtration device for marine environment monitoring

Abstract

The utility model discloses a water sample suction filtration device for marine environment monitoring, and belongs to the technical field of environment monitoring. The device comprises a vacuum pump, a plurality of filter flasks and a sample injection tank above the filter flasks, the filter flasks are connected in series, an opening is formed in the upper part of the sample injection tank, and spraying equipment is arranged on the opening; the filter bottle is connected with the sample injection tank through a filter assembly, and filter membranes of different specifications can be placed in the filter assembly; and the filter bottle is connected with the liquid separator, so that the water sample can be accurately and quantitatively subpackaged. The utility model aims to provide a small filtering and subpackaging device which is free from disassembly and cleaning and is universally applicable for the related fields of marine ecological environment investigation and monitoring, the integration of suspended sediment filtering and filtered water sample subpackaging is realized, the suspended sediment filtering and water sample subpackaging efficiency is improved, the operation steps are simplified, and the detection time is saved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to environmental monitoring technical field, concretely relates to a water sample suction filtration device for marine environment monitoring. BACKGROUND

[0002] The detection of various indexes such as conventional nutrient salt (inorganic nitrogen, inorganic phosphorus), heavy metal elements (copper, lead, zinc, cadmium, chromium, arsenic) in seawater in marine environment monitoring mostly needs to be carried out after the suspended silt in seawater is filtered, and the current filtering device is mostly a suction filtration system built by an organic glass screw filter or a glass clamp filter and a vacuum pump. The conventional suction filtration system needs to be repeatedly switched on and off, and the water sample needs to be manually divided into test tubes or polyethylene plastic reagent bottles after the filter bottle is taken down, and the next operation is carried out after the filter bottle is cleaned, so the automatic degree of water sample division is low, and batch operation is impossible.

[0003] KR1020230104535 of a Korean patent discloses a natural filtration type filter with improved seawater filtration efficiency, and the supplied seawater is naturally filtered through the medium by its own load and water pressure, in addition to the filtration through the medium and the backwashing process through the backwater, and a plurality of filter pipe assemblies are additionally provided, and the seawater containing suspended matters such as peat can also be more efficiently and cleanly filtered. The patent still has room for improvement.

[0004] According to the marine monitoring specification, the filtration step of the suspended silt measured by the weight method needs to be washed three times with distilled water, the filtered water sample before washing can be used as the water sample for nutrient salt determination, and the water sample after washing cannot be used as the water sample for nutrient salt determination, and the existing suction filtration device cannot meet the pretreatment requirements of the suspended silt and other indexes with only one filtration operation. SUMMARY

[0005] The utility model aims at providing a small, disassembly-free cleaning filtration and division device for the field of marine ecological environment investigation and monitoring, simple experimental operation, integrated device, and improved efficiency of seawater suspended silt filtration and filtered water sample division.

[0006] To solve the technical problems of complicated operation, long time consumption, batch operation impossibility and low automation degree of the existing filtration equipment, the utility model discloses a water sample suction filtration device for marine environment monitoring, which comprises a vacuum pump, a filter bottle and a sample inlet tank above the filter bottle, the filter bottle and the sample inlet tank are connected through a filter assembly, the inner diameter of the filter assembly decreases from top to bottom, and the filter assembly is internally provided with a filter membrane.

[0007] The filter membrane on the market has different sizes. In order to facilitate the filtering operation, the filtering assembly is designed to be suitable for different sizes of filter membranes. The inner diameter of the filtering assembly is large at the top and small at the bottom. The filter membrane can be placed in different positions of the filtering assembly and limited, so that the suction filtration device is more practical and convenient to operate.

[0008] The filtering assembly is sequentially provided with a first ring, a second ring and a third ring from top to bottom. The first ring is matched with the upper part of the second ring to form a first space. The second ring is matched with the upper part of the third ring to form a second space. The filter membrane can be placed between the first ring and the second ring or between the second ring and the third ring. Specifically, the first ring is provided with an inner thread on the side wall. The upper side wall of the second ring is provided with an outer thread. The lower side wall of the second ring is provided with an inner thread. The third ring is provided with an outer thread. The filtering assembly is of a screw type. After the filtering operation is completed, the filter membrane can be replaced by screwing off without the need of dismounting and reassembling the sample tank and the filtering assembly. The operation is convenient and time-saving. It is worth noting that the effective area of the filter membrane is determined by the inner diameter of the filtering assembly. The inner diameter of the filtering assembly decreases from top to bottom. The first space is suitable for placing a larger filter membrane. The second space is suitable for placing a smaller filter membrane. The diameters of the filter membranes placed in the first space and the second space need to be greater than the inner diameter of the filtering assembly at the same height. During the experiment, if the content of the sediment in seawater is high, a larger filter membrane is selected and placed in the first space. If the content of the sediment in seawater is low, a smaller filter membrane is selected and placed in the second space.

[0009] The sample tank is provided with a spraying device on the upper opening. The spraying device is connected with a water pipe. The spraying device is provided with a control switch. The water pipe is connected with distilled water. According to the marine monitoring specification, the filtering step of the suspended sediment is determined by the weight method. Distilled water is added for three times of washing to make the sediment on the bottle wall converge to the filter membrane. After drying, the weight is measured. The device has automatic spraying and cleaning functions and can realize integrated operation without dismounting the sample tank for cleaning. The filter membrane can be directly taken out and replaced by screwing off the filtering assembly. The spraying device can be set to automatically spray for a washing time or manually control the switch. After washing, the next water sample can be filtered to realize batch operation.

[0010] Specifically, a safety bottle is arranged between the vacuum pump and the filtering bottle. The vacuum pump is connected with the side wall of the safety bottle through a conduit. The safety bottle is closed and connected with the filtering bottle through a conduit at the upper end. The conduit is provided with a valve. The vacuum pump is provided with an air pressure gauge. The safety bottle is arranged to place liquid to prevent the liquid from flowing back into the vacuum pump. The valve can be opened and closed according to the operation requirement.

[0011] Specifically, there are at least two sets of filter bottles and sample inlet tanks and their spraying equipment. The filter bottles are connected by conduits equipped with valves. The filter bottles are connected in series by conduits on one side of the filter bottles. Valves are installed on the conduits, which can control multiple sets of filtration devices by a vacuum pump to improve working efficiency. Different negative pressure filtration can also be adopted according to different water samples.

[0012] The filter bottle has a water outlet at its bottom, and a valve is installed on the water outlet. The water outlet is connected to a conduit, which is connected to a separator. The separator is fixed to the filter bottle through the conduit, so that the solution transfer process is in a closed system, avoiding liquid evaporation and splashing, reducing liquid loss, and preventing water sample contamination, making the filtration and dispensing process safer and more reliable.

[0013] The dispenser includes a bottle body and a sleeve above it. A drain tube is installed inside the bottle body and connected to an opening at the top of the bottle body. The sleeve has graduations on its side wall. The dispenser can acquire a certain volume of measuring liquid. The measuring liquid flows out of the bottle body through the drain tube and into a dispensing bottle. The sleeve has graduations on its side wall, and the amount of water flowing out of the bottle corresponds to the graduation. The dispenser can achieve precise quantitative dispensing: With the valves between the dispenser and the waste liquid tank and the valve at the bottom of the filter bottle closed, the dispenser bottle is filled with seawater. Moving the core rod in the sleeve above the dispenser bottle to the graduation corresponding to the desired water volume increases the air pressure inside the dispenser bottle, causing liquid to flow out from the drain tube. A sampling container is used to collect the filtered water sample for determining indicators such as nutrients. The volume of the test water sample can be read from the graduations on the dispenser.

[0014] The bottom of the separator is connected to a waste liquid tank via a conduit equipped with a valve. After dispensing, the valve is opened, and the liquid flows into the waste liquid tank. The dispensed water sample is used for the determination of indicators such as nutrients.

[0015] Compared with existing technologies, this invention offers the following advantages: it improves the efficiency of suspended sediment filtration and water sample dispensing, eliminates the need for disassembly and cleaning, and enables integrated operation. In this invention, the filtration device is equipped with a separator, enabling precise quantitative dispensing. This eliminates the need for manual measurement of water sample volume, improving the timeliness of sample pretreatment and preventing missed optimal testing times. The filtration components can be configured with filter membranes of different sizes, making the device more practical. The spraying design allows sediment content determination experiments to be completed using the filtration device; after rinsing, the next round of filtration can be performed, greatly simplifying operation. This invention can be used for water sample filtration in marine ecological environment surveys and other water environment surveys. The device is portable and can be operated in both land-based and shipboard laboratories. Attached Figure Description

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only exemplary, and for those skilled in the art, other drawings can be derived from the provided drawings without creative labor.

[0017] Figure 1 The principle diagram of the water sample suction filtration device for marine environment monitoring.

[0018] Figure 2 The schematic diagram of the filter assembly.

[0019] Figure 3 The cross-sectional view of the filter assembly.

[0020] Figure 4 The schematic diagram of the device in Example 3.

[0021] The drawing description mark: 1-vacuum pump; 2-gauge; 3-valve; 4-safety bottle; 5-filter bottle; 6-filter assembly; 601-first sleeve ring; 602-second sleeve ring; 603-third sleeve ring; 604-internal thread; 605-external thread; 7-filter membrane; 8-sample tank; 9-spraying equipment; 10-water pipe; 11-liquid separator; 12-waste liquid barrel; 13-tray; 14-first rod; 15-limiting block; 16-second rod. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0023] The concepts involved in the present application will be described below in combination with the drawings. It is pointed out here that the following descriptions of the concepts are only to make the content of the present application easier to understand, and do not represent the limitation of the protection scope of the present application; meanwhile, the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0024] Example One

[0025] As Figure 1As shown, a water sample filtration device for marine environment monitoring includes a vacuum pump 1, a filter bottle 5, and a sample tank 8 above the filter bottle 5. The filter bottle 5 is connected with the sample tank 8 through a filter assembly 6. The inner diameter of the filter assembly 6 decreases from top to bottom. The filter assembly 6 is internally provided with a filter membrane 7. The filter membranes of different sizes are available in the market. In order to facilitate the filtration operation, the filter assembly 6 is designed to be suitable for filter membranes of different sizes. The inner diameter of the filter assembly 6 is large at the top and small at the bottom. The filter membrane 7 can be positioned at different positions of the filter assembly 6 according to its size and be limited, so that the filtration device is more practical and convenient to operate.

[0026] As shown in Figure 2 and Figure 3 The filter assembly 6 is sequentially provided with a first ring 601, a second ring 602, and a third ring 603 from top to bottom. The first ring 601 is matched with the upper part of the second ring 602 to form a first space. The second ring 602 is matched with the upper part of the third ring 603 to form a second space. The filter membrane 7 can be placed between the first ring 601 and the second ring 602 or between the second ring 602 and the third ring 603.

[0027] Specifically, the first ring 601 is provided with an inner thread 604 on the side wall. The upper part of the second ring 602 is provided with an outer thread 605 on the side wall. The lower part of the second ring 602 is provided with an inner thread on the side wall. The third ring 603 is provided with an outer thread on the side wall. The filter assembly 6 is of a screw type. After the filtration operation is completed, the filter membrane 7 can be replaced by simply unscrewing. The sample tank 8 and the filter assembly 6 do not need to be removed and reassembled, which is convenient to operate and saves time and effort. It is worth noting that the effective area of the filter membrane 7 is determined by the inner diameter of the filter assembly 6. The inner diameter of the filter assembly 6 decreases from top to bottom. The first space is suitable for placing a larger filter membrane. The second space is suitable for placing a smaller filter membrane. The diameters of the filter membranes placed in the first space and the second space need to be greater than the inner diameter of the filter assembly 6 at the same height. During the experiment, if the content of sediment in seawater is high, a larger filter membrane is selected and placed in the first space. If the content of sediment in seawater is low, a smaller filter membrane is selected and placed in the second space.

[0028] The sample tank 8 is provided with a spraying device 9 above the opening. The spraying device 9 is connected with a water pipe 10. The spraying device 9 is provided with a control switch. The water pipe 10 is connected with distilled water. According to the marine monitoring specification, the filtration step of the suspended sediment is determined by weight method. Distilled water is added for washing three times. The sediment on the bottle wall is collected to the filter membrane 7. After drying, the weight is measured. The device has automatic spraying and cleaning functions and can realize integrated operation. The sample tank 8 does not need to be disassembled for cleaning. The filter membrane 7 can be directly taken out and replaced by unscrewing the filter assembly 6. The spraying device 9 can be set to automatically spray for a washing time or manually control the switch. After washing, the filtration of the next water sample can be performed, so that batch operation can be realized.

[0029] Specifically, the safety bottle 4 is arranged between the vacuum pump 1 and the filter bottle 5, the vacuum pump 1 is connected to the side wall of the safety bottle 4 through a conduit, the safety bottle 4 is closed, the upper end of the safety bottle 4 is connected to the filter bottle 5 through a conduit, the conduit is provided with a valve 3, and the vacuum pump 1 is provided with an air pressure gauge. The safety bottle 4 is arranged to prevent liquid from flowing back into the vacuum pump 1, and the valve 3 can be opened and closed according to operation requirements.

[0030] Specifically, the filter bottle 5 and the sample inlet tank 8 are at least two groups, the filter bottles 5 are connected through conduits, and the conduits are provided with valves 3. The conduits arranged on one side of the filter bottles 5 connect the filter bottles 5 in series, the valves 3 arranged on the conduits can control multiple filter devices through the vacuum pump 1, improve work efficiency, and different negative pressures can be adopted for different water samples.

[0031] The filter bottle 5 is provided with a water outlet below, the water outlet is provided with a valve, the water outlet is connected to a conduit, and the conduit is connected to the liquid distributor 11. The liquid distributor 11 is fixedly connected to the filter bottle 5 through a conduit, so that the solution removal process is in a closed system, liquid volatilization and splashing are avoided, liquid loss is reduced, water samples are prevented from being polluted, and the filtration and sub-packaging process is safer and more reliable.

[0032] The liquid distributor 11 comprises a bottle body and a sleeve above the bottle body, a drainage tube is arranged in the bottle body, the drainage tube is connected to an opening above the bottle body, and a scale is arranged on the side wall of the sleeve. The liquid distributor 11 can obtain a certain volume of measured liquid, the measured liquid can flow out of the bottle body into a sub-packaging bottle through the drainage tube, the side wall of the sleeve is provided with a scale, the amount of water flowing out of the bottle body corresponds to the scale, and thus precise sub-packaging can be realized.

[0033] The liquid distributor 11 is connected to the waste liquid tank 12 through a conduit at the bottom, and the conduit is provided with a valve. After sub-packaging is completed, the valve is opened, and the liquid flows into the waste liquid tank 12. The sub-packaged water sample is used for determination of indicators such as nutrients.

[0034] Embodiment two

[0035] Based on embodiment one, the steps of filtering seawater suspended silt and sub-packaging the filtered water sample are as follows:

[0036] After obtaining the ocean water sample, first open the sample inlet tank 8, place the filter membrane 7 in the filter assembly 6, then measure an appropriate amount of water sample and pour it into the sample inlet tank 8. The filter membrane 7 filters out impurities such as mud and sand from the water sample. The filtered water sample flows into the filter bottle 5. Turn on the vacuum pump 1 to extract the air from the filter bottle 5. Use negative pressure to draw the ocean water sample from the sample inlet tank 8 through the filter membrane 7 into the filter bottle 5. The speed at which the filtered water sample enters the filter bottle 5 can be adjusted by adjusting the amount of negative pressure in the filter bottle 5. After all the water sample in the sample inlet tank 8 has been filtered into the filter bottle 5, open the valve at the bottom outlet of the filter bottle 5, and the liquid flows into the separator 11. The separator 11 enables precise quantitative dispensing: Close the valves between the separator 11 and the waste liquid tank 12, and the valve at the bottom of the filter bottle 5. The separator 11 contains seawater. Move the core rod in the sleeve above the separator 11 to the mark corresponding to the desired water volume. The air pressure inside the separator 11 increases, and liquid flows out from the drain tube. Use a sampling container to collect the filtered water sample for nutrient and other indicator determination. The water volume of the test sample can be read from the mark on the separator 11. To measure the sediment content of the water sample, after the above filtration steps are completed, turn on the spray device 9 and rinse three times with distilled water. Unscrew the filter assembly 6, remove the filter membrane 7 (containing sediment and other impurities), dry it, and weigh it. Determine the sediment content in the water sample by gravimetric method. Then, open the valves on the spray device 9 and the bottom conduit of the separator 11. After rinsing, turn off the vacuum pump 1, and the water sample flows to the waste liquid tank 12. Repeat the steps for the next round of filtration.

[0037] Example 3

[0038] Device structure optimization based on Embodiment 1:

[0039] A tray 13 is provided, and the filter bottle 5 is placed on the tray 13. A first rod 14 is vertically provided in the center of the tray 13. A third rod is provided inside the first rod 14. The third rod is connected to a limiting block 15 on the side of the first rod 14. The top of the third rod is movably connected to one end of a second rod 16. The other end of the second rod 16 is connected to the spraying device 9.

[0040] The second rod 16 is a telescopic rod, and the angle between the first rod 14 and the second rod 16 is 80° to 100°.

[0041] like Figure 4 As shown, the circular marking on tray 13 can hold safety bottles 4 and multiple filter bottles 5. A frame can be placed below tray 13, with a built-in water tank as a waste liquid tank. Tray 13 has holes through which the tubing connected to the filter bottles 5 can pass to the water tank below.

[0042] The second rod 16 can drive the spraying device 9 to rotate above any filter bottle 5 to wash the sample injection tank 8 connected above the filter bottle 5, and the whole device is simple and portable. The first rod is sleeved outside the third rod, and the two are coaxial. When the limiting block 15 is loosened, the third rod can move up and down, and when the limiting block 15 is fastened, the third rod is fixed, so that the up and down movement of the spraying device 9 can be realized. When the sample is poured into the sample injection tank 8, the spraying device 9 moves up, and when spraying, in order to reduce or avoid the waste of water resources caused by the spraying of distilled water on the outer wall of the sample injection tank 8, and to make the washing of the inner wall of the sample injection tank 8 more sufficient, the spraying device 9 moves down to the height near the mouth of the sample injection tank 8.

[0043] It should be noted that the terms used in the present application are only for the purpose of describing specific embodiments, and are not intended to limit the scope of the present application. As shown in the specification of the present application, unless the context clearly indicates otherwise, "one", "a", "an" and / or "the" do not refer to a single number, but also include plural. The terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method or device. Without more limitations, the element defined by the statement "including one" does not exclude the presence of other identical elements in the process, method or device including the element.

[0044] It should also be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. Unless otherwise specified and limited, the terms "mount", "connect", "connect" and the like should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication between two elements inside. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0045] The above-described embodiments and / or implementations are only used to illustrate the preferred embodiments and / or implementations of the present application, and are not intended to limit the implementation of the present application in any form. Any person skilled in the art can make some changes or modifications to other equivalent embodiments without departing from the scope of the technical means disclosed in the present application, but should be considered as the same technology or embodiment as the present application.

[0046] The principles and implementation manners of the present application are described herein by using specific examples, and the above example descriptions are only used to help understand the method of the present application and its core idea. The above descriptions are only preferred implementation manners of the present application, and it should be noted that, due to the limited nature of the language expression, there are objectively infinite specific structures, and for ordinary skilled persons in the technical field, some improvements, refinements or changes can be made without departing from the principles of the present application, or the above technical features can be combined in an appropriate manner; these improvements, refinements, changes or combinations, or the direct application of the inventive concept and technical solution to other occasions without improvement, shall be regarded as the protection scope of the present application.

Claims

1. A water sample filtration device for marine environmental monitoring, comprising a vacuum pump (1), a filter bottle (5), and a sample inlet (8) above the filter bottle (5), characterized in that: The filter bottle (5) is connected to the sample injection tank (8) via a filter assembly (6). The inner diameter of the filter assembly (6) decreases from top to bottom. The filter assembly (6) contains a filter membrane (7). The filter bottle (5) is connected to a dispenser (11).

2. The marine environmental monitoring water sampling and filtration device according to claim 1, characterized in that: The filter assembly (6) consists of a first ring (601), a second ring (602), and a third ring (603) from top to bottom. The lower part of the first ring (601) and the upper part of the second ring (602) cooperate to form a first space, and the lower part of the second ring (602) and the upper part of the third ring (603) cooperate to form a second space.

3. The marine environmental monitoring water sampling and filtration device according to claim 2, characterized in that: The first collar (601) has an internal thread (604) on its side wall, the second collar (602) has an external thread (605) on its upper side wall and an internal thread on its lower side wall, and the third collar (603) has an external thread on its side wall.

4. The marine environmental monitoring water sampling and filtration device according to claim 1, characterized in that: The sample injection tank (8) has an opening at the top, on which a spray device (9) is provided. The spray device (9) is connected to a water pipe (10), and a control switch is provided on the spray device (9).

5. The marine environmental monitoring water sampling and filtration device according to claim 1, characterized in that: A safety bottle (4) is provided between the vacuum pump (1) and the filter bottle (5). The vacuum pump (1) is connected to the side wall of the safety bottle (4) through a conduit. The safety bottle (4) is sealed and its upper end is connected to the filter bottle (5) through a conduit. The conduit is equipped with a valve (3). The vacuum pump (1) is equipped with a pressure gauge.

6. The marine environmental monitoring water sampling and filtration device according to claim 1, characterized in that: The filter bottle (5) and the sample injection tank (8) are at least two sets, and the filter bottles (5) are connected by a conduit, which is equipped with a valve (3).

7. The marine environmental monitoring water sampling and filtration device according to claim 1, characterized in that: The filter bottle (5) has an outlet at the bottom, and a valve is provided on the outlet. The outlet is connected to a conduit, which is connected to the separator (11).

8. The marine environmental monitoring water sampling and filtration device according to claim 7, characterized in that: The dispenser (11) includes a bottle body and a sleeve above it. A drainage tube is provided inside the bottle body and is connected to the opening above the bottle body. The side wall of the sleeve is provided with a scale and a core rod is provided inside.

9. A marine environmental monitoring water sampling and filtration device according to claim 7, characterized in that: The bottom of the separator (11) is connected to the waste liquid tank (12) via a conduit, and the conduit is equipped with a valve.

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