Simple plankton grading sampling device

Abstract

The utility model relates to the technical field of sampling devices, in particular to a simple plankton grading sampling device which comprises a device body and a filtering assembly arranged in the device body, the device body comprises an upper connecting part capable of feeding water, a lower connecting part capable of draining water and a filtering connecting part, and the filtering assembly is connected to the inner side of the filtering connecting part. The device body is vertically communicated, the lower side of the upper connecting part is provided with an upper connecting part thread, the upper side of the lower connecting part is provided with a lower connecting part thread, the filtering connecting part is provided with a first connecting thread located on the upper side of the filtering connecting part and a second connecting thread located on the lower side of the filtering connecting part, and the device body is detachably connected. All the parts of the device body are detachably connected through screw-thread fit, an operator can easily detach all the parts, the convenience degree of operation is improved, the efficiency is high, the cost is low, and the sampling requirements of ponds, lakes, reservoirs, rivers, offshore water bodies and the like can be met.

Description

TECHNICAL FIELD

[0001] The utility model relates to sampling device technical field, concretely is a simple and easy plankton hierarchical sampling device. BACKGROUND

[0002] Plankton is a kind of class of animals that often float in water, cannot manufacture organic matter and lives in water, is widely distributed in lakes, reservoirs, oceans and various water bodies, and occupies a crucial position in water environment. Plankton is various in species and different in size, and can be divided into picoplankton less than 2 μm, nanoplankton 2-20 μm, microplankton 20-200 μm, mesoplankton 200-2000 μm and macroplankton more than 2000 μm according to individual size. Especially, planktonic algae less than 200 μm are huge in quantity in water body, are main primary producers in most nearshore and freshwater water bodies, and play an important role in food chain. In traditional sampling process, it is difficult to effectively collect and classify this part of sample due to too large mesh size of plankton net.

[0003] Traditional plankton hierarchical sampling often adopts multi-connected plankton net or uses different specifications of plankton net for hierarchical filtration. Although the hierarchical sampling of plankton can be realized, the sampling equipment is expensive and complicated to operate, and is more suitable for extremely nutrient-poor waters such as deep sea, and is not suitable for most nearshore or freshwater water bodies. Therefore, it is urgent to make a flexible and convenient, efficient and low-cost plankton hierarchical sampling device to meet the sampling needs of pond, lake, reservoir, river and nearshore water bodies, and has important application value for water quality evaluation and ecological environment monitoring activities. UTILITY MODEL CONTENT

[0004] In view of the technical problems of the above-mentioned existing plankton hierarchical sampling equipment, the technical solution for solving the technical problems of the utility model is as follows:

[0005] A simple phytoplankton hierarchical sampling device, comprising a device body, a filter assembly arranged in the device body, the device body comprising a water inletable upper connecting part, a water drainable lower connecting part, a filter connecting part between the upper connecting part and the lower connecting part, the filter assembly being connected inside the filter connecting part, the device body being arranged in communication between the upper connecting part and the lower connecting part, the lower side of the upper connecting part being provided with upper connecting part threads, the upper side of the lower connecting part being provided with lower connecting part threads, the filter connecting part being provided with first connecting threads on the upper side thereof and second connecting threads on the lower side thereof.

[0006] The first connecting threads are connected with the upper connecting part threads, and the second connecting threads are connected with the lower connecting part threads, so that the device body can be detachably connected.

[0007] Further, in some embodiments of the present application, the filter assembly comprises a first fixed sheet, a second fixed sheet, and a filter screen between the first fixed sheet and the second fixed sheet, the filter screen being a silk screen, and the pore size of the filter screen being between 2 μm and 200 μm.

[0008] Further, in some embodiments of the present application, the upper side of the filter connecting part is provided with a supporting table accommodating the filter assembly, and the first fixed sheet and the second fixed sheet are arranged in a ring shape.

[0009] Further, in some embodiments of the present application, the supporting table is provided with a clamping ring for fixing the filter assembly, and the clamping ring is arranged in a ring shape.

[0010] Further, in some embodiments of the present application, the filter assembly further comprises a sealing part, the sealing part being sleeved on the outer side of the first fixed sheet and the second fixed sheet, and the sealing part being made of an elastic material.

[0011] Further, in some embodiments of the present application, one side of the filter connecting part is provided with a boss, when one of the first connecting threads or the second connecting threads is located outside the boss, the other of the first connecting threads or the second connecting threads is located inside the filter connecting part, and when the one of the first connecting threads or the second connecting threads is located inside the boss, the other of the first connecting threads or the second connecting threads is located outside the filter connecting part.

[0012] Further, in some embodiments of the present application, the inner side of the lower connecting part is provided with a slope and a drain port in communication with the slope, and the height of the drain port is equal to or lower than the height of the lowermost side of the slope.

[0013] Further, in some embodiments of the utility model, the filter connecting part is provided with multiple, the first connecting thread of one filter connecting part can be connected with the second connecting thread of another filter connecting part, the device body is cylindrical.

[0014] Further, in some embodiments of the utility model, the filter assembly is provided with multiple groups, the filter mesh aperture of the filter assembly close to the upper connecting part is greater than the filter mesh aperture of the filter assembly close to the lower connecting part.

[0015] Further, in some embodiments of the utility model, the first fixed sheet is provided with a first positioning end, the second fixed sheet is provided with a second fixed end, one of the first positioning end and the second fixed end is convex, and the other is recessed, and the first positioning end and the second fixed end are provided with multiple and are correspondingly arranged.

[0016] The utility model has the advantages of the following:

[0017] The device body parts of the utility model are detachably connected through thread cooperation, and when installing the filter assembly or cleaning and storing the sampling device, the operator can easily detach the parts, compared with the traditional complex sampling equipment, the utility model improves the convenience of operation, is efficient and low in cost, and can meet the sampling needs of ponds, lakes, reservoirs, rivers and nearshore water bodies. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a simple phytoplankton hierarchical sampling device schematic view of the utility model.

[0019] Figure 2 It is a simple phytoplankton hierarchical sampling device exploded view of the utility model.

[0020] Figure 3 It is a lower connecting part schematic view of a simple phytoplankton hierarchical sampling device of the utility model.

[0021] Figure 4 It is Figure 3 A-A sectional view of.

[0022] Figure 5 It is a filter connecting part and filter assembly schematic view of a simple phytoplankton hierarchical sampling device of the utility model.

[0023] Figure 6 It is Figure 5 B-B sectional view of.

[0024] Figure 7 It is Figure 6 C part enlarged view of.

[0025] Figure 8 This is an exploded view of another embodiment of the simple plankton grading and sampling device of this utility model. Detailed Implementation

[0026] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings. The described embodiments are merely some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0027] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0028] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0029] like Figures 1 to 8 A simple plankton grading and sampling device is shown, comprising a device body 1 and a filter assembly 2 disposed within the device body 1. The device body 1 includes an upper connecting part 3 for water inlet, a lower connecting part 4 for water outlet, and a filter connecting part 5 located between the upper connecting part 3 and the lower connecting part 4. The filter assembly 2 is connected to the inner side of the filter connecting part 5. The device body 1 is configured with vertical connection. The lower side of the upper connecting part 3 is provided with an upper connecting thread 31, and the upper side of the lower connecting part 4 is provided with a lower connecting thread 41. The filter connecting part 5 is provided with a first connecting thread 51 on its upper side and a second connecting thread 52 on its lower side.

[0030] The first connecting thread 51 engages with the upper connecting thread 31, and the second connecting thread 52 engages with the lower connecting thread 41, allowing the device body 1 to be detachably connected. The filter pore size of the filter assembly is between 1μm and 300μm.

[0031] The device body parts are detachably connected through thread cooperation, and when the filtering assembly is installed or the sampling device is cleaned and stored, the operator can easily detach the parts, compared with the traditional complex sampling device, the operation convenience is improved, the efficiency is high and the cost is low, and the sampling demand of the water body such as pond, lake, reservoir, river and near shore can be met.

[0032] Specifically, the utility model discloses the inside is equipped with filtering assembly, and the filtering aperture is between 1mu m-300mu m, and the structure that the whole device is communicated up and down is favorable to the flow of water from top to bottom, in the sampling process, can be according to different filtering demand, with the different aperture of filtering assembly, the phytoplankton is carried out hierarchical sampling, the problem that the effective collection and classification of the sample such as phytoplankton algae less than 200mu m is difficult in the traditional sampling because of the too large mesh size of phytoplankton is solved, so different particle size range's phytoplankton sample can be more accurately obtained.

[0033] The sampling device can be conveniently carried to the corresponding place for sampling work according to the specific conditions of different water bodies, for example, when sampling in a small pond, it can be easily carried and quickly assembled for use, effectively collecting phytoplankton in different areas, and better adapting to diversified sampling environments.

[0034] Optionally, in some embodiments, water containing phytoplankton enters the filtering connecting part from the upper connecting part, and after filtering the water sample through the filtering assembly, part of the phytoplankton is blocked on the filtering assembly, and the water enters the lower connecting part from the filtering connecting part and is discharged. After the device body is disassembled, the filtering assembly is taken out to detect the phytoplankton, and the discharged water sample can be collected for further research.

[0035] As shown in Figure 2 and Figure 7 A simple phytoplankton hierarchical sampling device, the filtering assembly 2 includes a first fixed sheet 6, a second fixed sheet 7, a filtering screen 8 between the first fixed sheet 6 and the second fixed sheet 7, the filtering screen 8 is a silk screen, and the aperture of the filtering screen 8 is between 2mu m-200mu m.

[0036] Further, as a preferred embodiment of the utility model but not limited, the filtering screen is fixed by the first fixed sheet and the second fixed sheet, so that the filtering screen can be stably connected to the inner side of the filtering connecting part of the sampling device, and cooperates with the up-down communication structure of the device body, when the water containing phytoplankton flows into the sampling device, the water flows from top to bottom, can efficiently utilize the filtering screen to realize filtering classification, and improves the practicability and effectiveness of the whole sampling device.

[0037] Specifically, the screen gauze has the characteristics of uniform texture and regular mesh, which can ensure that the plankton is stably and accurately filtered according to its size when the water flows through, avoid sampling errors caused by irregular mesh and the like, and ensure that the collected plankton samples can truly reflect the actual situation in the water body. The screen gauze is relatively durable, can maintain good filtering performance during multiple sampling processes, and can meet the long-term and repeated sampling work requirements.

[0038] Specifically, the pore size of the filter screen is set to be between 2um and 200um, which can effectively screen and grade plankton of different sizes. For important plankton populations such as plankton algae smaller than 200um, the traditional sampling equipment is difficult to effectively collect and grade due to the too large mesh size, while the filter screen of the screen gauze structure can retain plankton within 2um-200um, and can also distinguish plankton of different particle sizes, which helps to more carefully understand the species composition and quantity distribution of plankton in the water body, and can effectively evaluate the ecology and water quality.

[0039] Optionally, in some embodiments, the pore size of the filter screen can be set to, but not limited to, 2um, 20um, 200um.

[0040] As shown in Figure 2 and Figure 7 A simple plankton grading sampling device, the upper side of the filter connecting part 5 is provided with a supporting table 53 accommodating the filter assembly 2, and the first fixed sheet 6 and the second fixed sheet 7 are arranged in a ring shape.

[0041] Further, as a preferred embodiment of the present application but not limited, the supporting table can position and support the filter assembly, so as to avoid displacement, loosening or even falling of the filter assembly due to the impact of water flow or shaking of the sampling device during sampling. When the operator installs the filter assembly into the device body, the operator only needs to place the filter assembly on the supporting table to complete the preliminary positioning, and then fix the filter screen by combining the first fixed sheet and the second fixed sheet, so that the entire installation process is simple and convenient. When it is necessary to clean the filter assembly or replace the filter screen, the filter assembly can also be conveniently taken off from the supporting table, and the ring-shaped fixed sheet is convenient to disassemble and reinstall, which is conducive to improving the installation and disassembly efficiency of the entire sampling device.

[0042] Specifically, the first fixed sheet and the second fixed sheet are annularly arranged, so that the filter screen can be uniformly and stably fixed around, when the water flow carrying plankton passes through the filter screen, the water flow pressure from all directions can be uniformly dispersed on the whole annular structure, so that the filter screen will not be damaged due to excessive local stress, and the water flow can pass through each part of the filter screen more uniformly for filtration, thereby improving the accuracy and efficiency of filtration, so that the plankton can be more reasonably intercepted or passed according to its particle size, and high-quality plankton samples can be obtained.

[0043] As shown in Figure 2 and Figure 7 , a simple plankton hierarchical sampling device, the supporting table 53 is provided with a clamping ring 531 for fixing the filter assembly 2, and the clamping ring 531 is annularly arranged.

[0044] Optionally, the clamping ring is an annular groove for the filter assembly to extend into, and the annular clamping ring can tightly clamp the filter assembly, so that the filter assembly is firmly fixed on the supporting table and is prevented from moving in any direction. The operator only needs to align the filter assembly with the clamping ring and put it into the supporting table, so that the filter assembly can be quickly and accurately installed, and the operation is simple and convenient. When it is necessary to take out and replace the filter assembly, the clamping ring can be easily released to fix the filter assembly, so that the filter assembly can be taken out.

[0045] As shown in Figure 2 and Figure 7 , a simple plankton hierarchical sampling device, the filter assembly 2 further comprises a sealing part 9, the sealing part 9 is sleeved outside the first fixed sheet 6 and the second fixed sheet 7, and the sealing part 9 is made of an elastic material.

[0046] Further, as a preferred embodiment of the utility model but not limited, the sealing part with elasticity can tightly fit the filter connecting part or the clamping ring, so as to fill the gap between the filter assembly and the filter connecting part or the clamping ring, prevent the water sample from leaking out of the connection between the filter assembly and the device body during sampling, and ensure that the water sample can flow through the filter screen according to the predetermined path for filtration. At the same time, it can also prevent foreign matters from entering the sampling device from these gaps and interfering with the normal filtration and classification of plankton, so as to ensure the purity and accuracy of the collected plankton samples.

[0047] Specifically, the sealing part is sleeved outside the first fixed sheet and the second fixed sheet, which can play a role in reinforcing the overall structure of the filter assembly, so that the parts are more tightly combined, and under the action of external forces such as water flow impact, the shape and position can be better maintained, the stability of the filter assembly in the device is further ensured, and the whole plankton hierarchical sampling device can be stably operated, thereby improving the reliability of the sampling work.

[0048] In addition, the elastic sealing part makes the filter assembly easier to be embedded into the corresponding position of the sampling device during installation, and can be moderately deformed along the internal structure of the device, so as to smoothly complete the installation. When the filter assembly needs to be disassembled and replaced, the sealing part can also be relatively separated from the sampling device, which is convenient for operation.

[0049] Optionally, in some embodiments, the sealing part can be made of silica gel, rubber or the like, which is convenient to replace and clean, and has high durability.

[0050] As shown in Figure 2 and Figure 8 A simple phytoplankton hierarchical sampling device, one side of the filter connecting part 5 is provided with a boss 54, one of the first connecting thread 51 or the second connecting thread 52 is located outside the boss 54, and the other of the first connecting thread 51 or the second connecting thread 52 is located inside the filter connecting part 5, and one of the first connecting thread 51 or the second connecting thread 52 is located inside the boss 54, and the other of the first connecting thread 51 or the second connecting thread 52 is located outside the filter connecting part 5.

[0051] Compared with the conventional and relatively single connection mode, the boss and the first connecting thread and the second connecting thread distributed inside and outside make the connection between the filter connecting part and the upper connecting part and the lower connecting part more stable. It can ensure firm connection while avoiding unnecessary space occupation between the connecting parts, so that the overall appearance of the device is more compact, and it is more convenient to carry and place and operate flexibly in different water environments.

[0052] In addition, the operator can quickly and accurately connect the upper connecting part, the lower connecting part and the filter connecting part according to the positional relationship of the boss and the thread during installation, which reduces the installation failure caused by the complex connection mode. Similarly, when the device needs to be disassembled for cleaning and replacement, the parts can be quickly separated, thereby improving the convenience and efficiency of daily operation, saving time and labor cost.

[0053] As shown in Figures 2 to 4 A simple phytoplankton hierarchical sampling device, the inner side of the lower connecting part 4 is provided with a slope 42 and a drain port 43 communicating with the slope 42, and the height of the drain port 43 is equal to or lower than the height of the lowermost side of the slope 42.

[0054] Further, as the preferred embodiment of the utility model but not limited, the setting of the inclined surface can guide the water flow to naturally converge to the drain, so that the remaining water after filtering by the filtering assembly can smoothly flow to the drain along the inclined surface, avoiding the accumulation of water in the sampling device, ensuring that the drainage process is fast and efficient, thereby ensuring that the entire sampling device can continuously and smoothly perform the filtering and sampling work of plankton, and the subsequent inflow and filtering of water samples will not be affected by poor drainage.

[0055] In addition, since the height of the drain is equal to or lower than the height of the lowermost side of the inclined surface, the water can be completely drained to the greatest extent, and the subsequent inflow of water samples will not be mixed with the previous water samples due to incomplete drainage. After some impurities and small particles carried in the water pass through the filtering assembly, some of them may still flow down with the water flow. The presence of the inclined surface can prevent these impurities from accumulating at a certain position inside the device during the downward sliding process, but instead flow directly along the inclined surface to the drain, reducing the blockage of the drainage channel inside the device, helping to maintain the working state of the sampling device, prolonging the use time of the sampling device, and reducing the frequency of frequent cleaning due to blockage.

[0056] As shown in Figure 8 A simple plankton hierarchical sampling device, the filtering connection part 5 is provided with a plurality of first connection threads 51, which can be connected with the second connection threads 52 of another filtering connection part 5, and the device body 1 is provided in a cylindrical shape.

[0057] Further, as the preferred embodiment of the utility model but not limited, a plurality of filtering connection parts are provided, and they can be connected through thread cooperation, which makes the sampling device flexible in combination according to actual sampling needs, realizing the multi-stage filtering function. When sampling the water body with relatively simple and narrow plankton particle size distribution, only part of the filtering connection parts can be selected for simple classification; while in complex water environment, the number of filtering connection parts can be increased to strengthen the classification effect.

[0058] Specifically, when sampling the water body with rich plankton species and large particle size span, different pore size filtering screens can be connected in series on different filtering connection parts, so as to more carefully classify and filter the plankton according to multiple different particle size ranges.

[0059] Furthermore, the cylindrical structure makes the whole connection more regular and compact, reducing unnecessary space waste and facilitating placement and operation at different sampling sites.

[0060] As shown in Figure 8The simple phytoplankton hierarchical sampling device is characterized in that the filtering assembly 2 is provided with multiple groups, the filtering mesh aperture of the filtering assembly 2 close to the upper connecting part 3 is larger than the filtering mesh aperture of the filtering assembly 2 close to the lower connecting part 4.

[0061] Specifically, when the filtering connecting part is provided with two filtering connecting parts, the filtering connecting part located at the upper side and close to the upper connecting part is provided with a filtering assembly with a mesh aperture of 200 μm, and the filtering connecting part located at the lower side and close to the lower connecting part is provided with a filtering assembly with a mesh aperture of 20 μm. The filtering assemblies are sequentially arranged in the order of the mesh aperture from large to small from top to bottom, and the phytoplankton can be classified according to the particle size. The phytoplankton with different particle sizes is sequentially intercepted when passing through the filtering assemblies, and when the water sample enters from the upper connecting part of the sampling device, the filtering mesh with a larger aperture first filters the water sample, quickly intercepts the phytoplankton with a larger particle size, avoids the accumulation of large-particle phytoplankton on the filtering mesh with a smaller aperture, reduces the risk of blocking the filtering mesh with a smaller aperture, ensures that the water flow can continuously and smoothly pass through the filtering assemblies, and improves the efficiency of the whole filtering process.

[0062] In addition, when the device needs to be disassembled and cleaned, the hierarchical filtering arrangement makes the phytoplankton and impurities intercepted on each filtering assembly relatively single, facilitating the cleaning and maintenance of different filtering assemblies.

[0063] As shown in Figure 2 and Figure 7 The simple phytoplankton hierarchical sampling device is characterized in that the first fixed sheet 6 is provided with a first positioning end 61, the second fixed sheet 7 is provided with a second fixed end 62, one of the first positioning end 61 and the second fixed end 62 is a protrusion, and the other is a groove, and the first positioning end 61 and the second fixed end 62 are provided with multiple corresponding positioning ends.

[0064] Further, as a preferred embodiment of the present application, but not limited to, when assembling the filtering assembly, the operator matches and fits the protrusion with the corresponding groove, which can accurately determine the relative position of the first fixed sheet and the second fixed sheet, avoid installation deviation, and ensure that the filtering mesh can be uniformly and flatly fixed between the two. When replacing the fixed sheet and the filtering mesh, the matching structure of the protrusion and the groove allows the operator to separate the first fixed sheet and the second fixed sheet, remove the filtering mesh for corresponding treatment, and then reassemble according to the original positioning mode.

[0065] In addition, the matching of multiple protrusions and multiple grooves makes the connection between the first fixed sheet and the second fixed sheet more firm and close, effectively prevents the relative displacement of the two fixed sheets, ensures that the filtering mesh is always in a stable and tight state, and further enhances the structural stability of the whole filtering assembly.

[0066] Embodiment one

[0067] As Figures 1 to 8 The utility model provides a simple phytoplankton hierarchical sampling device, including device body 1, filter assembly 2 set up in device body 1, device body 1 includes the upper connecting portion 3 of water intake, the lower connecting portion 4 of water discharge, the filter connecting portion 5 between upper connecting portion 3 and lower connecting portion 4, filter assembly 2 is connected in filter connecting portion 5 inside, device body 1 is set up in communication, the downside of upper connecting portion 3 is equipped with upper connecting portion thread 31, the upside of lower connecting portion 4 is equipped with lower connecting portion thread 41, filter connecting portion 5 is equipped with the first connecting thread 51 at its upside and the second connecting thread 52 at its downside,

[0068] The first connecting thread 51 is connected with the upper connecting portion thread 31, and the second connecting thread 52 is connected with the lower connecting portion thread 41, so that the device body 1 can be detachably connected. The filter aperture of the filter assembly is between 1 μm and 300 μm.

[0069] The device body 1 is detachably connected through thread cooperation, and the operator can easily detach the parts when installing the filter assembly 2 or cleaning and storing the sampling device. Compared with the traditional sampling equipment with complex operation, the utility model improves the convenience of operation, has high efficiency and low cost, and can meet the sampling requirements of ponds, lakes, reservoirs, rivers and nearshore water bodies.

[0070] The water containing phytoplankton enters the filter connecting portion 5 from the upper connecting portion 3, and after being filtered by the filter assembly 2, part of the phytoplankton is blocked on the filter assembly 2, and the water enters the lower connecting portion 4 from the filter connecting portion 5 and is discharged. The operator detaches the device body 1, takes out the filter assembly 2, and detects the phytoplankton, and the discharged water sample can be collected for further research.

[0071] Embodiment two

[0072] Embodiment two is based on embodiment one and has the following implementation manner:

[0073] The filter assembly 2 includes a first fixed sheet 6, a second fixed sheet 7, and a filter screen 8 between the first fixed sheet 6 and the second fixed sheet 7. The filter screen 8 is a silk screen, and the aperture of the filter screen 8 is between 2 μm and 200 μm.

[0074] The aperture of the filter screen 8 is provided with specifications of 2 μm, 20 μm and 200 μm.

[0075] Embodiment three

[0076] Embodiment three is based on embodiment two, and has the following implementation manners:

[0077] The upper side of the filter connecting part 5 is provided with a supporting table 53 for accommodating the filter assembly 2, and the first fixing sheet 6 and the second fixing sheet 7 are arranged in a ring shape.

[0078] The supporting table 53 is provided with a clasp 531 for fixing the filter assembly 2, and the clasp 531 is arranged in a ring shape.

[0079] Embodiment four

[0080] Embodiment four is based on embodiment three, and has the following implementation manners:

[0081] The filter assembly 2 further comprises a sealing part 9, which is sleeved on the outer side of the first fixing sheet 6 and the second fixing sheet 7, and is made of an elastic material.

[0082] The sealing part 9 is made of silica gel.

[0083] Embodiment five

[0084] Embodiment five is based on embodiment one, and has the following implementation manners:

[0085] One side of the filter connecting part 5 is provided with a boss 54, when one of the first connecting thread 51 or the second connecting thread 52 is located on the outer side of the boss 54, the other of the first connecting thread 51 or the second connecting thread 52 is located on the inner side of the filter connecting part 5, when one of the first connecting thread 51 or the second connecting thread 52 is located on the inner side of the boss 54, the other of the first connecting thread 51 or the second connecting thread 52 is located on the outer side of the filter connecting part 5.

[0086] Specifically, when the upper connecting part thread 31 of the upper connecting part 3 is an external thread, the first connecting thread 51 is an internal thread located on the upper side of the filter connecting part 5, the boss 54 is located on the lower side of the filter connecting part 5, the second connecting thread 52 is an external thread located on the outer side of the boss 54, and the lower connecting part thread 41 of the lower connecting part 4 is an internal thread.

[0087] Specifically, when the upper connecting part thread 31 of the upper connecting part 3 is an internal thread, the boss 54 is located on the upper side of the filter connecting part 5, the first connecting thread 51 is an external thread located on the outer side of the filter connecting part 5, the second connecting thread 52 is an internal thread located on the filter connecting part 5, and the lower connecting part thread 41 of the lower connecting part 4 is an external thread.

[0088] Specifically, when the upper connecting portion thread 31 of the upper connecting portion 3 is an external thread, the first connecting thread 51 is an internal thread on the upper side of the filter connecting portion 5, the boss 54 is on the lower side of the filter connecting portion 5, the second connecting thread 52 is an internal thread on the outer side of the boss 54, and the lower connecting portion thread 41 of the lower connecting portion 4 is an external thread.

[0089] Specifically, when the upper connecting portion thread 31 of the upper connecting portion 3 is an external thread, the boss 54 is on the upper side of the filter connecting portion 5, the first connecting thread 51 is an internal thread on the inner side of the filter connecting portion 5, the second connecting thread 52 is an external thread on the filter connecting portion 5, and the lower connecting portion thread 41 of the lower connecting portion 4 is an internal thread.

[0090] Such an arrangement can facilitate the user to distinguish the upper connecting portion, the lower connecting portion, and the filter connecting portion.

[0091] Of course, in other embodiments, the upper connecting portion thread 31 and the lower connecting portion thread 41 can both be internal threads, and the first connecting thread 51 and the second connecting thread 52 can both be external threads. Such an arrangement requires the operator to distinguish the upper and lower positions according to the differences between the parts.

[0092] Of course, in other embodiments, the upper connecting portion thread 31 and the lower connecting portion thread 41 can both be external threads, and the first connecting thread 51 and the second connecting thread 52 can both be internal threads. Such an arrangement requires the operator to distinguish the upper and lower positions according to the differences between the parts.

[0093] Embodiment Six

[0094] Embodiment Six is based on Embodiment One and has the following implementation:

[0095] The inner side of the lower connecting portion 4 is provided with a slope 42 and a drainage port 43 communicating with the slope 42, and the height of the drainage port 43 is lower than the height of the lowermost side of the slope 42.

[0096] Of course, in other embodiments, the height of the drainage port 43 is equal to the height of the lowermost side of the slope 42.

[0097] Embodiment Seven

[0098] Embodiment Seven is based on Embodiment Two and has the following implementation:

[0099] The filter connecting portion 5 is provided with a plurality of filter connecting portions 5, one of the first connecting threads 51 of the filter connecting portions 5 can be connected with the second connecting thread 52 of another filter connecting portion 5, and the device body 1 is provided in a cylindrical shape.

[0100] The filter assembly 2 is provided with multiple groups, and the filter mesh aperture of the filter assembly 2 close to the upper connecting part 3 is larger than the filter mesh aperture of the filter assembly 2 close to the lower connecting part 4.

[0101] Specifically, when the filter connecting part 5 is provided with two, the filter connecting part 5 located at the upper side and close to the upper connecting part 3 is provided with the filter assembly 2 with the aperture of 200 μm, and the filter connecting part 5 located at the lower side and close to the lower connecting part 4 is provided with the filter assembly 2 with the aperture of 20 μm. The filter assemblies are sequentially arranged in the order of the apertures from large to small from top to bottom, so that the plankton can be classified according to the particle size.

[0102] Embodiment eight

[0103] The embodiment eight is different from the embodiment seven in that the following implementation is adopted:

[0104] Specifically, when the filter connecting part 5 is provided with three, the filter connecting part 5 located at the upper side and close to the upper connecting part 3 is provided with the filter assembly 2 with the aperture of 200 μm, the filter connecting part 5 located at the lower side and close to the lower connecting part 4 is provided with the filter assembly 2 with the aperture of 2 μm, and the filter connecting part 5 located in the middle is provided with the filter assembly 2 with the aperture of 20 μm.

[0105] Embodiment nine

[0106] The embodiment nine is based on the embodiment two, and the following implementation is adopted:

[0107] The first fixing piece 6 is provided with a first positioning end 61, the second fixing piece 7 is provided with a second fixing end 62, one of the first positioning end 61 and the second fixing end 62 is a protrusion, and the other is a groove, and the first positioning end 61 and the second fixing end 62 are provided with multiple and are correspondingly arranged.

[0108] Optionally, in some embodiments, the first fixing piece 6 is located at the upper side, the first positioning end 61 is a protrusion, the second fixing piece 7 is located at the lower side, and the second fixing end 62 is a groove.

[0109] Of course, in some embodiments, the first fixing piece 6 is located at the upper side, the first positioning end 61 is a groove, the second fixing piece 7 is located at the lower side, and the second fixing end 62 is a protrusion.

[0110] The above only further illustrates the technical content of the utility model by means of embodiments, so as to make the reader more easily understand, but does not represent that the implementation mode of the utility model is limited to this, and any technical extension or re-creation made according to the utility model is also protected by the utility model. The protection scope of the utility model is subject to the patent claim.

Claims

1. A simple phytoplankton fraction sampling device, comprising a device body (1), a filter assembly (2) arranged in the device body (1), characterized in that: The device body (1) comprises a water-enterable upper connecting part (3), a water-drainable lower connecting part (4), a filtering connecting part (5) between the upper connecting part (3) and the lower connecting part (4), the filtering assembly (2) is connected inside the filtering connecting part (5), the device body (1) is arranged in communication from top to bottom, the lower side of the upper connecting part (3) is provided with an upper connecting part thread (31), the upper side of the lower connecting part (4) is provided with a lower connecting part thread (41), the filtering connecting part (5) is provided with a first connecting thread (51) on the upper side and a second connecting thread (52) on the lower side; The first connecting thread (51) is connected with the upper connecting part thread (31), and the second connecting thread (52) is connected with the lower connecting part thread (41), so that the device body (1) can be detachably connected.

2. A simple phytoplankton fraction sampling device according to claim 1, characterized in that: The filtering assembly (2) comprises a first fixed sheet (6), a second fixed sheet (7), and a filtering screen (8) between the first fixed sheet (6) and the second fixed sheet (7), the filtering screen (8) is a silk screen, and the aperture of the filtering screen (8) is between 2 μm and 200 μm.

3. A simple phytoplankton fractionating sampling device according to claim 2, characterized in that: The upper side of the filtering connecting part (5) is provided with a supporting table (53) for accommodating the filtering assembly (2), and the first fixed sheet (6) and the second fixed sheet (7) are arranged in a ring shape.

4. A simple phytoplankton fraction sampling device according to claim 3, characterized in that: The supporting table (53) is provided with a clamping ring (531) for fixing the filtering assembly (2), and the clamping ring (531) is arranged in a ring shape.

5. A simple phytoplankton fractionating sampling device according to claim 2, characterized in that: The filtering assembly (2) further comprises a sealing part (9) sleeved outside the first fixed sheet (6) and the second fixed sheet (7), and the sealing part (9) is made of an elastic material.

6. The simple phytoplankton fractionating sampling device according to claim 1, characterized in that: One side of the filtering connecting part (5) is provided with a boss (54), when one of the first connecting thread (51) or the second connecting thread (52) is located outside the boss (54), the other of the first connecting thread (51) or the second connecting thread (52) is located inside the filtering connecting part (5), when one of the first connecting thread (51) or the second connecting thread (52) is located inside the boss (54), the other of the first connecting thread (51) or the second connecting thread (52) is located outside the filtering connecting part (5).

7. The simple phytoplankton fractionating sampling device according to claim 1, characterized in that: The inner side of the lower connecting part (4) is provided with an inclined surface (42) and a drainage port (43) in communication with the inclined surface (42), and the height of the drainage port (43) is equal to or lower than the height of the lowermost side of the inclined surface (42).

8. The simple phytoplankton fractionating sampling device according to claim 1, characterized in that: The filtering connecting part (5) is provided with a plurality of first connecting threads (51) and a plurality of second connecting threads (52), one of the first connecting threads (51) of one of the filtering connecting parts (5) can be connected with the second connecting thread (52) of another of the filtering connecting parts (5), and the device body (1) is arranged in a cylindrical shape.

9. The simple phytoplankton fractionating sampling device according to claim 2, characterized in that: The filtering assembly (2) is provided with a plurality of groups, and the aperture of the filtering screen of the filtering assembly (2) close to the upper connecting part (3) is greater than the aperture of the filtering screen of the filtering assembly (2) close to the lower connecting part (4).

10. The simple phytoplankton fractionating sampling device according to claim 2, characterized in that: The first fixed sheet (6) is provided with a first positioning end (61), the second fixed sheet (7) is provided with a second fixed end (62), one of the first positioning end (61) and the second fixed end (62) is a convex, and the other is a groove, the first positioning end (61) and the second fixed end (62) are provided with a plurality of and are correspondingly arranged.

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