Portable micro-plastic concentration sampling device for sediments

Abstract

The utility model discloses a portable sediment micro-plastic concentration sampling device which comprises a mounting seat, a baffle is fixedly connected to the right side of the mounting seat, a cover plate is fixedly connected to the top of the mounting seat, a filter tank is formed in the left side of the top of the mounting seat, and a concentration tank and a water passing tank located below the concentration tank are formed in the right side of the mounting seat. Through the arrangement of a series of structures, sediments can be filtered and pretreated in advance before filtering and sampling of micro-plastics, the mixing amount of impurities and the micro-plastics can be effectively reduced, the sediments can be extruded in the concentrating and sampling process, the speed that the sediments penetrate through a filtering membrane is increased, and the sampling efficiency is improved. The amount of water accumulated at the top of the filtering membrane is reduced, impurities and micro-plastics can be directly pushed out and cleaned in an electric driving mode after filtering for a period of time, personnel do not need to independently disassemble and clean after filtering, personnel operation is facilitated, and the filtering stability and the working efficiency are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of microplastic sampling, in particular to a portable sediment microplastic concentration sampling device. Background Art

[0002] Microplastics refer to plastic particles with a diameter of less than 5 mm. They are a major carrier of pollution and are mainly covered in sediments. In order to understand the current status and trend of microplastic pollution in sediments, it is usually necessary to use a sampling device to sample and analyze the microplastics in the sediments. When sampling, a microplastic sampling device for sediments is needed. In the prior art, centrifugal filtration is usually used to separate microplastics from sediments to achieve concentrated sampling of microplastics. Some also use direct filtration with a filter membrane to concentrate all microplastics together, increase their concentration, and achieve the effect of concentrated sampling of microplastics. For example, application number: 202322916792.4 discloses a sediment microplastic sampling device, including a sampling box, a fixing frame, and a sampling Sample seat, filter membrane, handle, limit mechanism, limit rod, limit groove, slide plate, spring, filter box, plug-in slot, rotating shaft, motor, coarse filter plate, fine filter plate, cleaning mechanism, bushing, brush plate, impact mechanism, water spray pipe, nozzle, high-pressure pump, water inlet pipe, connecting pipe, feed port, box door, water outlet pipe and water valve. The upper end of the sampling box is fixedly connected to a fixed frame, a sampling seat is provided in the middle of the upper end of the fixed frame, the lower end of the sampling seat is fixedly connected to the filter membrane, handles are fixedly connected in the middle of the upper end of the sampling seat, a limit mechanism is provided between the sampling seat and the fixed frame, and a filter box is plugged into the upper end of the sampling box. The advantage of this device compared with the prior art is that the sediment is filtered during collection, which facilitates the sampling and collection of microplastic particles.

[0003] The sediment microplastic sampling device disclosed in the above patent performs pretreatment through a coarse filter plate and a fine filter plate when filtering and sampling microplastics, and pre-filters impurities in the sediment, which can effectively reduce the mixing of impurities and microplastics, resulting in a high impurity content in the microplastics, which makes subsequent processing inconvenient, and the pretreatment and concentrated sampling are integrated together, which is convenient for people to carry; however, the above patent still has some shortcomings when in use: 1. It cannot discharge the filtered impurities and microplastics in time during pretreatment and filtration collection of microplastics. Each time the filtration is completed, the device needs to be disassembled for cleaning and discharge, which is inconvenient to operate, and a large amount of impurities and microplastics accumulate on the top of the filter plate and the filter membrane during the filtration process, which easily affects the filtration efficiency; 2. When filtering and concentrating microplastics through the filter membrane, the filtration efficiency is low by relying on the fluidity of the sediment water to pass through the filter membrane. When the water flow is slow, water easily accumulates on the upper part of the filter membrane, affecting the filtration; Based on the above situation, we propose a portable sediment microplastic concentration sampling device. Utility Model Content

[0004] The purpose of the utility model is to solve the shortcomings of the prior art and to propose a portable sediment microplastic concentration sampling device.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A portable sediment microplastic concentration sampling device comprises a mounting seat, a baffle is fixedly connected to the right side of the mounting seat, a cover is fixedly connected to the top of the mounting seat, a filter tank is provided on the left side of the top of the mounting seat, a concentration tank and a water trough located below the concentration tank are provided on the right side of the mounting seat, the baffle cooperates with the concentration tank and the water trough, and the baffle can block the right sides of the concentration tank and the water trough, a one-way valve with the bottom as the outlet is embedded and fixed between the bottom inner wall of the filter tank and the top inner wall of the concentration tank, the setting of the one-way valve can effectively prevent the sediment inside the concentration tank from flowing back, a filter hole is provided between the top inner wall of the water trough and the bottom inner wall of the concentration tank, a filter membrane is fixedly installed in the filter hole, the filter membrane is used to filter and separate microplastics in the sediment, and a first filter screen and a second filter screen located below the first filter screen are fixedly installed in the filter tank. The first filter screen and the second filter screen cooperate with each other to pre-filter impurities in the sediment. The top of the first filter screen, the top of the second filter screen and the top of the filter membrane are in movably contact with the same push cleaning mechanism, which is used to push and clean impurities and microplastics. The right side of the push cleaning mechanism extends to the right side of the baffle. The right side of the mounting seat is embedded with a first electric telescopic rod fixedly connected to the output shaft and the push cleaning mechanism. The first electric telescopic rod is used to drive the push cleaning mechanism. An extrusion mechanism is installed in the concentration tank. The extrusion mechanism is used to squeeze the sediment inside the concentration tank to speed up the flow of the sediment. Two collection boxes with openings on the top are placed on the left side of the mounting seat. A drain valve connected to the water trough is embedded and fixed at the bottom right side of the baffle, and an inlet valve connected to the inside of the filter tank is embedded and fixed on the top of the cover plate.

[0007] Preferably, the pushing and cleaning mechanism includes three push plates, the bottom of the push plates is set as a blade structure, the three push plates are respectively located on one side of the top of the first filter screen, the second filter screen and the filter membrane, the push plates are used to push and clean impurities and microplastics on the top of the first filter screen, the second filter screen and the filter membrane, the right sides of the two push plates located above are in active contact with the right inner wall of the filter tank, the right side of the push plate located at the bottom is in active contact with the right inner wall of the filter hole, the left side of the push plate is fixedly connected to a connecting rod, the left end of the connecting rod is fixedly connected to a blocking block, and the mounting seat seals the movable sleeve It is arranged on three blocking blocks, the top of the collecting box at the bottom is lower than the bottom of the lowest blocking block, the top of the collecting box at the top is flush with the bottom of the middle blocking block, the right side of the push plate is fixedly connected with a connecting cross bar, the right end of the connecting cross bar extends to the right side of the baffle, the mounting seat and the baffle are both sealed and slidingly sleeved on the three connecting cross bars, the right ends of the three connecting cross bars are fixedly connected to the same vertical rod, the right end of the output shaft of the first electric telescopic rod is fixedly connected to the left side of the vertical rod, the first electric telescopic rod, the vertical rod and the connecting cross bar cooperate to drive the three push plates to move laterally.

[0008] Preferably, the extrusion mechanism includes a piston that is sealed and movablely sleeved in the concentration tank, and a reciprocating electric telescopic rod is fixedly installed on the bottom inner wall of the concentration tank. The left end of the output shaft of the reciprocating electric telescopic rod is fixedly connected to the right side of the piston, and the reciprocating electric telescopic rod is used to drive the piston to move back and forth left and right.

[0009] Preferably, the piston is located on the right side of the one-way valve and the filter hole, and a sealing ring is provided on the outer fixed sleeve of the piston. The outer side of the sealing ring is in active contact with the inner wall of the concentration tank, and a sealed connection between the piston and the concentration tank is achieved through the sealing ring.

[0010] Preferably, the front side of the reciprocating electric telescopic rod and the front side of the first electric telescopic rod are both fixed and electrically connected with a wireless remote control switch, and the two wireless remote control switches are matched with the same external remote control. The wireless remote control switch and the external remote control cooperate to achieve the effect of remote control.

[0011] Preferably, two discharge holes are provided on the left inner wall of the filter tank, and a discharge hole is provided on the left inner wall of the filter hole, which is used to discharge impurities or microplastics. The outer side of the sealing block is bonded and coated with a first sealing rubber, and the outer side of the first sealing rubber is in active contact with the corresponding inner wall of the discharge hole. The sealing block and the first sealing rubber cooperate to seal the corresponding discharge hole.

[0012] Preferably, two rectangular perforations are provided on the right inner wall of the filter tank, and a rectangular perforation is provided on the right inner wall of the filter hole. The outer side of the connecting cross bar is bonded and covered with a second sealing rubber, and the outer side of the second sealing rubber is in movable contact with the corresponding inner wall of the rectangular perforation. Three movable holes are provided on the right side of the baffle, and the inner wall of the movable hole is in movable contact with the corresponding outer side of the second sealing rubber.

[0013] Preferably, the filter holes on the first filter screen are larger than the filter holes on the second filter screen.

[0014] Compared with the existing technology, the beneficial effects of the utility model are:

[0015] 1. The first filter and the second filter are used in conjunction to pre-treat the sediment and filter out impurities, which can effectively reduce the amount of impurities and microplastics mixed. The filter membrane can separate microplastics from sediment liquid, achieving the effect of concentrated sampling of microplastics.

[0016] 2. The squeezing mechanism can squeeze the sediment during the filtration sampling process, thereby accelerating the rate at which the sediment passes through the filter membrane, thereby improving the filtration efficiency, reducing the amount of water accumulated on the top of the filter membrane, and improving the filtration stability;

[0017] 3. Through the cooperation of the first electric telescopic rod, the pushing cleaning mechanism and the collection box, impurities and microplastics can be directly pushed out for cleaning through electric drive after a period of filtration, which can effectively reduce the situation where filtration is affected by excessive accumulation, and does not require personnel to disassemble and clean separately after filtration, making it convenient for personnel to operate;

[0018] Through the arrangement of a series of structures, the utility model can pre-filter and pre-treat the sediment before filtering and sampling the microplastics, which can effectively reduce the amount of impurities and microplastics mixed, and can squeeze the sediment during the concentrated sampling process, thereby accelerating the rate at which the sediment passes through the filter membrane and reducing the amount of water accumulated on the top of the filter membrane. After filtering for a period of time, the impurities and microplastics can be directly pushed out and cleaned by electric drive, without the need for personnel to disassemble and clean them separately after filtration, which is convenient for personnel to operate and improves filtration stability and work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of a portable sediment microplastic concentration sampling device proposed in the utility model;

[0020] Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure;

[0021] Figure 3 for Figure 1Schematic diagram of the right view structure.

[0022] In the figure: 1. Mounting seat; 101. Filter tank; 102. Concentration tank; 103. Water trough; 104. Filter hole; 2. First filter screen; 3. Second filter screen; 4. Filter membrane; 5. Piston; 6. Reciprocating electric telescopic rod; 7. Drain valve; 8. Water inlet valve; 9. Collection box; 10. Blocking block; 11. Connecting thin rod; 12. Push plate; 13. Connecting cross bar; 14. Vertical rod; 15. First electric telescopic rod; 16. One-way valve; 17. Baffle. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0024] Reference Figure 1-3 A portable sediment microplastic concentration sampling device includes a mounting base 1, a baffle 17 is fixedly connected to the right side of the mounting base 1, a cover is fixedly connected to the top of the mounting base 1, pull rings are fixedly connected to both sides of the top of the cover, and the two pull rings are tied with the same pulling handle rope, and the entire device can be carried by pulling the handle rope to achieve a portable effect. A filter tank 101 is provided on the top left side of the mounting base 1, and a concentration tank 102 and a water trough 103 located below the concentration tank 102 are provided on the right side of the mounting base 1. The baffle 17 cooperates with the concentration tank 102 and the water trough 103, and a bottom inner wall of the filter tank 101 and the top inner wall of the concentration tank 102 are embedded and fixed. The one-way valve 16 at the outlet can effectively prevent the sediment from flowing back into the concentration tank 102. A filter hole 104 is provided between the top inner wall of the water trough 103 and the bottom inner wall of the concentration tank 102. A filter membrane 4 is fixedly installed in the filter hole 104. The filter membrane 4 is used to filter and separate microplastics in the sediment to achieve concentrated sampling of microplastics. A first filter screen 2 and a second filter screen 3 located below the first filter screen 2 are fixedly installed in the filter tank 101. The filter holes on the first filter screen 2 are larger than the filter holes on the second filter screen 3. The first filter screen 2 and the second filter screen 3 cooperate to filter and pre-treat impurities in the sediment.

[0025] The top of the first filter screen 2, the top of the second filter screen 3 and the top of the filter membrane 4 are in active contact with the same pushing cleaning mechanism, the right side of the pushing cleaning mechanism extends to the right side of the baffle 17, and the right side of the mounting seat 1 is embedded with a first electric telescopic rod 15 fixedly connected with the output shaft and the pushing cleaning mechanism. The pushing cleaning mechanism includes three push plates 12, the bottom of the push plate 12 is set as a blade structure, and the three push plates 12 are respectively located on one side of the top of the first filter screen 2, the second filter screen 3 and the filter membrane 4. The push plates 12 are used to push and clean impurities and microplastics on the top of the first filter screen 2, the second filter screen 3 and the filter membrane 4. The two push plates located above The right side of the push plate 12 is in active contact with the right inner wall of the filter tank 101, the right side of the push plate 12 at the bottom is in active contact with the right inner wall of the filter hole 104, the front and rear sides of the two push plates 12 at the top are in active contact with the front inner wall and rear inner wall of the filter tank 101 respectively, the front and rear sides of the push plate 12 at the bottom are in active contact with the front inner wall and rear inner wall of the filter hole 104 respectively, the left side of the push plate 12 is fixedly connected with a connecting rod 11, the left end of the connecting rod 11 is fixedly connected with a blocking block 10, the mounting seat 1 is sealingly sleeved on the three blocking blocks 10, wherein two discharge ports are provided on the left inner wall of the filter tank 101. Hole, a discharge hole is provided on the left inner wall of the filter hole 104, and the discharge hole is used to discharge impurities or microplastics. The outer side of the blocking block 10 is bonded and coated with a first sealing rubber. The outer side of the first sealing rubber is in active contact with the corresponding inner wall of the discharge hole. The blocking block 10 and the first sealing rubber cooperate to block the corresponding discharge hole. The right side of the push plate 12 is fixedly connected to a connecting cross bar 13, and the right end of the connecting cross bar 13 extends to the right side of the baffle 17. The mounting seat 1 and the baffle 17 are both sealed and slidably sleeved on the three connecting cross bars 13, wherein two rectangular perforations are provided on the right inner wall of the filter tank 101, and the right inner wall of the filter hole 104 A rectangular through-hole is opened on it, and the outer side of the connecting cross bar 13 is bonded and covered with a second sealing rubber. The outer side of the second sealing rubber is in movable contact with the inner wall of the corresponding rectangular through-hole. Three movable holes are opened on the right side of the baffle 17. The inner wall of the movable hole is in movable contact with the outer side of the corresponding second sealing rubber. The rectangular through-hole and the movable hole are respectively used to allow the corresponding connecting cross bars 13 to pass through. The right ends of the three connecting cross bars 13 are fixedly connected to the same vertical rod 14. The right end of the output shaft of the first electric telescopic rod 15 is fixedly connected to the left side of the vertical rod 14. The first electric telescopic rod 15, the vertical rod 14 and the connecting cross bar 13 cooperate to drive the three push plates 12 to move laterally.

[0026] A groove is provided on the right side of the mounting base 1, and the left inner wall of the groove is fixedly connected to the left side of the first electric telescopic rod 15. A battery is embedded and fixed on the right side of the mounting base 1, and the battery is electrically connected to the first electric telescopic rod 15 to power the first electric telescopic rod 15.

[0027] The concentration tank 102 is provided with an extrusion mechanism, which includes a piston 5 which is sealed and movable in the concentration tank 102. The piston 5 is located on the right side of the one-way valve 16 and the filter hole 104. A sealing ring is fixed on the outer side of the piston 5. The outer side of the sealing ring is in movable contact with the inner wall of the concentration tank 102. The sealing connection between the piston 5 and the concentration tank 102 is achieved through the sealing ring. A reciprocating electric telescopic rod 6 is fixedly installed on the bottom inner wall of the concentration tank 102. The reciprocating multi-stage electric telescopic rod 6 is electrically connected to the battery. The battery supplies power to the reciprocating multi-stage electric telescopic rod 6. A support block, the top of the support block is fixedly connected to the bottom of the reciprocating electric telescopic rod 6, the support block is used to support the reciprocating electric telescopic rod 6, the left end of the output shaft of the reciprocating electric telescopic rod 6 is fixedly connected to the right side of the piston 5, the reciprocating electric telescopic rod 6 is used to drive the piston 5 to move back and forth, the front side of the reciprocating electric telescopic rod 6 and the front side of the first electric telescopic rod 15 are fixed and electrically connected to a wireless remote control switch, the wireless remote control switch on the first electric telescopic rod 15 is located in the groove, the two wireless remote control switches are matched with the same external remote control, the wireless remote control switch and the external remote control cooperate to achieve the effect of remote control;

[0028] Two collection boxes 9 with open tops are placed on the left side of the mounting base 1, wherein the left side of the mounting base 1 is fixedly connected to a placement plate, the upper collection box 9 is placed on the placement plate, and the bottom of the lower collection box 9 is flush with the bottom of the mounting base 1, wherein the top of the lower collection box 9 is lower than the bottom of the lowest blocking block 10, and the top of the upper collection box 9 is flush with the bottom of the middle blocking block 10. The two collection boxes 9 are used to collect impurities and microplastics respectively, and a drain valve 7 connected to the water trough 103 is embedded and fixed at the bottom of the right side of the baffle 17. The drain valve 7 is used to discharge the liquid inside the water trough 103, and the top of the cover plate is embedded and fixed. The water inlet valve 8 is connected to the inside of the filter tank 101, and the water inlet valve 8 is connected to the external sediment supply pipe for allowing sediment to enter; the utility model can pre-filter and pre-treat the sediment before filtering and sampling microplastics through a series of structural settings, which can effectively reduce the amount of impurities and microplastics mixed, and can squeeze the sediment during the concentrated sampling process, speed up the rate at which the sediment passes through the filter membrane 4, reduce the amount of water accumulated on the top of the filter membrane 4, and can directly push out and clean the impurities and microplastics by electric drive after filtering for a period of time, without the need for personnel to disassemble and clean them separately after filtration, which is convenient for personnel to operate and improves filtration stability and work efficiency.

[0029] Working principle: When in use, connect the water inlet valve 8 to the external sediment supply pipe. When the sediment enters the filter tank 101, the sediment will pass through the first filter screen 2 and the second filter screen 3 in sequence and enter the concentration tank 102 through the one-way valve 16. The first filter screen 2 and the second filter screen 3 filter the impurities in the sediment. The filtered large and small impurities are respectively blocked on the top of the first filter screen 2 and the second filter screen 3. By filtering and pre-treating the sediment, the amount of impurities and microplastics mixed can be effectively reduced;

[0030] At the same time, the reciprocating electric telescopic rod 6 is turned on, and the output shaft of the reciprocating electric telescopic rod 6 drives the piston 5 to move left and right in a cycle. When the sediment enters the concentration tank 102, the piston 5 moves to the left and squeezes and pressurizes the sediment in the concentration tank 102. Under the squeezing force, the sediment passes through the filter membrane 4 and enters the water groove 103. The filter membrane 4 blocks the microplastics on its top, thereby achieving the separation of the sediment and the microplastics. Through separation, the effect of concentrated sampling of the microplastics is achieved, and the movement of the piston 5 to squeeze and concentrate can speed up the rate at which the sediment passes through the filter membrane 4, thereby improving the filtration efficiency, reducing the amount of water accumulated on the top of the filter membrane 4, and improving the filtration stability. While sampling, the water pipe outside the drain valve 7 can be connected, so that the sediment is discharged to the outside through the drain valve 7;

[0031] After filtering for a period of time, the water inlet valve 8 can be closed to stop the sediment from entering, and then the first electric telescopic rod 15 can be started in the reverse direction. The output shaft of the first electric telescopic rod 15 drives the vertical rod 14 to move to the left, and the vertical rod 14 drives the three push plates 12 to move to the left through the three connecting cross bars 13. The push plates 12 drive the blocking block 10 to move to the left through the corresponding connecting thin rods 11. When the blocking block 10 moves to the left, the blockage of the corresponding discharge hole is released. When the three push plates 12 move to the left, the impurities and microplastics on the top of the first filter screen 2, the top of the second filter screen 3 and the top of the filter membrane 4 are pushed to the left respectively. The impurities and microplastics are discharged through the corresponding discharge holes and fall into the collection box 9. After discharge, the first electric telescopic rod 15 is started in the forward direction, so that the push plate 12 and the blocking block 10 are both converted to move back to the right and reset. The blocking block 10 blocks the corresponding discharge hole again, and the water inlet valve 8 can be opened again to allow the sediment to continue to enter the filtration. By using the electric drive after filtering for a period of time, the impurities and microplastics are directly pushed out for cleaning, which can effectively reduce the situation where the filtration is affected by too much accumulation, and there is no need for personnel to disassemble and clean them separately after filtration, which is convenient for personnel to operate and improve work efficiency.

[0032] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A portable sediment microplastic concentration sampling device, comprising a mounting base (1), a baffle (17) fixedly connected to the right side of the mounting base (1), and a cover plate fixedly connected to the top of the mounting base (1), characterized in that: The top left side of the mounting seat (1) is provided with a filter tank (101), the right side of the mounting seat (1) is provided with a concentration tank (102) and a water trough (103) located below the concentration tank (102), the baffle (17) cooperates with the concentration tank (102) and the water trough (103), a one-way valve (16) with the bottom as the outlet is fixedly mounted between the bottom inner wall of the filter tank (101) and the top inner wall of the concentration tank (102), a filter hole (104) is provided between the top inner wall of the water trough (103) and the bottom inner wall of the concentration tank (102), a filter membrane (4) is fixedly mounted in the filter hole (104), a first filter screen (2) and a filter membrane (4) located below the first filter screen (2) are fixedly mounted in the filter tank (101), and a filter membrane (4) is fixedly mounted in the filter tank (101). ) below the second filter screen (3), the top of the first filter screen (2), the top of the second filter screen (3) and the top of the filter membrane (4) are in active contact with the same pushing and cleaning mechanism, the right side of the pushing and cleaning mechanism extends to the right side of the baffle (17), the right side of the mounting seat (1) is embedded and fixed with a first electric telescopic rod (15) whose output shaft is fixedly connected to the pushing and cleaning mechanism, the concentration tank (102) is installed with a squeezing mechanism, two collection boxes (9) with openings at the top are placed on the left side of the mounting seat (1), the right bottom of the baffle (17) is embedded and fixed with a drain valve (7) connected to the water trough (103), and the top of the cover plate is embedded and fixed with a water inlet valve (8) connected to the inside of the filter tank (101).

2. A portable sediment microplastic concentration sampling device according to claim 1, characterized in that: The pushing and cleaning mechanism comprises three push plates (12), the bottom of each push plate (12) being configured as a blade structure, the three push plates (12) being respectively located on one side of the top of the first filter screen (2), the second filter screen (3) and the filter membrane (4), the right sides of the two push plates (12) located at the top being in active contact with the right inner wall of the filter tank (101), the right side of the push plate (12) located at the bottom being in active contact with the right inner wall of the filter hole (104), the left side of the push plate (12) being fixedly connected to a connecting rod (11), the left end of the connecting rod (11) being fixedly connected to a blocking block (10), the mounting seat (1) being sealingly movable sleeved on the three blocking blocks On the block (10), the top of the collecting box (9) located below is lower than the bottom of the lowest blocking block (10), and the top of the collecting box (9) located above is flush with the bottom of the middle blocking block (10). The right side of the push plate (12) is fixedly connected to a connecting cross bar (13), and the right end of the connecting cross bar (13) extends to the right side of the baffle (17). The mounting seat (1) and the baffle (17) are both sealed and slidably sleeved on the three connecting cross bars (13). The right ends of the three connecting cross bars (13) are fixedly connected to the same vertical bar (14). The right end of the output shaft of the first electric telescopic rod (15) is fixedly connected to the left side of the vertical bar (14).

3. A portable sediment microplastic concentration sampling device according to claim 2, characterized in that: The squeezing mechanism comprises a piston (5) which is sealably sleeved in a concentration tank (102); a reciprocating electric telescopic rod (6) is fixedly mounted on the bottom inner wall of the concentration tank (102); and the left end of the output shaft of the reciprocating electric telescopic rod (6) is fixedly connected to the right side of the piston (5).

4. A portable sediment microplastic concentration sampling device according to claim 3, characterized in that: The piston (5) is located on the right side of the one-way valve (16) and the filter hole (104). A sealing ring is provided on the outer fixed sleeve of the piston (5), and the outer side of the sealing ring is in active contact with the inner wall of the concentration tank (102).

5. The portable sediment microplastic concentration sampling device according to claim 3 is characterized in that: The front side of the reciprocating electric telescopic rod (6) and the front side of the first electric telescopic rod (15) are both fixed and electrically connected to a wireless remote control switch, and the two wireless remote control switches are matched with the same external remote controller.

6. The portable sediment microplastic concentration sampling device according to claim 2, characterized in that: Two discharge holes are provided on the left inner wall of the filter tank (101), and one discharge hole is provided on the left inner wall of the filter hole (104). The outer side of the blocking block (10) is bonded and coated with a first sealing rubber, and the outer side of the first sealing rubber is in active contact with the inner wall of the corresponding discharge hole.

7. The portable sediment microplastic concentration sampling device according to claim 2, characterized in that: Two rectangular through-holes are provided on the right inner wall of the filter tank (101), and one rectangular through-hole is provided on the right inner wall of the filter hole (104). The outer side of the connecting crossbar (13) is bonded and covered with a second sealing rubber, and the outer side of the second sealing rubber is in movable contact with the inner wall of the corresponding rectangular through-hole. Three movable holes are provided on the right side of the baffle (17), and the inner wall of the movable hole is in movable contact with the outer side of the corresponding second sealing rubber.

8. The portable sediment microplastic concentration sampling device according to claim 1, characterized in that: The filter holes on the first filter screen (2) are larger than the filter holes on the second filter screen (3).

Images