Microplastic fluorescence device and detection method

Abstract

The application relates to the technical field of environmental pollutant detection, in particular to a micro-plastic fluorescence device and a detection method, which comprises a sliding support base, a sealed container fixed on the sliding support base through clamping and fixing assemblies, a driving motor and an eccentric assembly, a shaking table of the sliding support base is slidably supported in a limiting support through omnidirectional rolling support, wherein the limiting support limits the movement range of the shaking table; a plurality of clamping and fixing assemblies are arranged at the upper end of the shaking table, the clamping and fixing assemblies can clamp and fix the sealed container; the stirring of the water body to be detected in the sealed container is realized through the shaking table, the micro-plastic particles can be prevented from adhering to the stirring device, and the detection error of the micro-plastic concentration can be reduced.

Description

Technical Field

[0001] This invention relates to the field of environmental pollutant detection technology, specifically to a microplastic fluorescent device and detection method. Background Technology

[0002] While plastic products bring various conveniences to people's lives, they also bring many harms. The most prominent of these is that after being discarded, plastic products undergo certain physical, chemical, and biological processes to become increasingly smaller plastic particles—microplastics, typically less than 5 mm in diameter. These plastic particles do not degrade naturally but remain in the environment and may even enter living organisms, causing numerous harms and risks.

[0003] When detecting microplastics in water, microplastic particles need to be fluorescently labeled for subsequent observation and calibration. However, due to their extremely small size, microplastic particles are prone to agglomeration and adhesion. When the fluorescent powder is placed in the water to be tested, thorough stirring is required to achieve mutual adsorption between the microplastic particles and the fluorescent powder. However, with existing microplastic fluorescent labeling devices, if stirring rods or blades are inserted into the water to be tested, the constant friction between the stirring device and the water containing microplastics causes microplastic particles to easily adhere to the surface of the stirring rods or blades. After prolonged stirring, this significantly affects the detection results of microplastic particles, causing errors in the detection of microplastic concentration. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a microplastic fluorescence device and detection method. By using a shaking stage to agitate the water in a sealed container, microplastic particles can be prevented from adhering to the agitation device, thereby reducing the detection error of microplastic concentration.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A microplastic fluorescent device includes a sliding support base, a sealed container fixed to the sliding support base by clamping and fixing components, a drive motor, and an eccentric component. A swaying stage of the sliding support base is slidably supported in a limiting support via an omnidirectional rolling support, wherein the limiting support restricts the movement range of the swaying stage. Multiple clamping and fixing components are provided at the upper end of the swaying stage, capable of clamping and fixing the sealed container, wherein the clamping and fixing components are self-locking when closed. A vertical drive shaft is fixedly connected to the lower end of the swaying stage, with the middle of the drive shaft located on the limiting support stage. An eccentric component is installed below the surface. The output end of the drive motor is connected to the lower end of the drive shaft via a transmission connector. The collected water is placed in a sealed container, and then a viscous fluorescent powder material is poured in. The drive motor drives the drive shaft and the shaking stage to rotate. The centrifugal force generated by the eccentric component causes the shaking stage to move laterally, thus fluorescently marking the water to be tested in the sealed container. The transmission connector enables the output shaft of the drive motor to rotate synchronously parallel to the drive shaft. By controlling the gradually changing speed of the drive motor, the eccentric component generates a continuous and gradually changing centrifugal force.

[0006] Furthermore, the lower end of the swaying table is provided with multiple omnidirectional rolling supports supported on the support platform of the limiting support. The weight on the swaying table is borne by the omnidirectional rolling supports. The omnidirectional rolling supports include rolling seats and spheres confined in the rolling seats to achieve omnidirectional rolling support.

[0007] Furthermore, the shaking platform has a circular structure, and multiple sliding elastic stops are arranged on the support platform near the perimeter of the shaking platform. The elastic blocks of the sliding elastic stops are slidably mounted on the support platform via guide rods, and springs are sleeved on the guide rods between the elastic blocks and the support platform. The elastic blocks abut against the end face of the shaking platform to achieve buffering and limiting of the shaking platform. The drive shaft on the shaking platform passes through the drive shaft through hole in the middle of the support platform, wherein the diameter of the drive shaft through hole is larger than the diameter of the drive shaft. A rotating shaft elastic stop is also provided at the drive shaft through hole, and the rotating shaft elastic stop is arranged around the drive shaft to achieve buffering and limiting of the drive shaft. The sliding support platform bears the weight through omnidirectional rolling support, and the rotating shaft elastic stop and the sliding elastic stop achieve stable limiting support during the shaking process.

[0008] Furthermore, the drive motor is fixed below the support platform by a motor bracket to output torque, and the eccentric component is set in the middle of the drive shaft and located between the transmission connector and the elastic stop of the rotating shaft; the drive motor outputs a gradually changing rotational motion to the drive shaft through the transmission connector, so that the eccentric component generates a gradually changing centrifugal force, and the drive shaft drives the shaking platform to rotate while generating lateral movement, thereby realizing the fluorescent marking of the water to be tested in the sealed container.

[0009] Furthermore, the transmission connector includes a first flange, a second flange, a third flange, a first connecting column, and a second connecting column; the first flange is fixedly connected to the output shaft of the drive motor, and the third flange is fixedly connected to the lower end of the drive shaft; the first flange is drivenly connected to the second flange through more than one first connecting column, and the second flange is drivenly connected to the third flange through more than one second connecting column, wherein the number of first and second connecting columns is the same and they are staggered on both sides of the second flange in the circumferential direction; the above connection structure allows the first flange, the second flange, and the third flange to generate a relative displacement in the lateral direction driven by an external force other than the rotational force while rotating; the first connecting column and the second connecting column have the same structure and each includes a column body, an input connection part, and an output connection part, with the input connection part and the output connection part located at both ends of the column body, and the column body can rotate around the axis of the input connection part and the output connection part; the first connecting column is rotatably connected to the first flange through the input connection part, and the output connection part of the first connecting column is rotatably connected to the second flange; the input connection part of the second connecting column is rotatably connected to the second flange, and the output connection part of the second connecting column is rotatably connected to the third flange.

[0010] Furthermore, the eccentric component includes a tray, a counterweight, a fixing component, and an upper cover. The tray and the upper cover are fixed parallel to each other on the drive shaft. The tray is divided into multiple phase areas, and each phase area can fix a different number of counterweights through the fixing component. When the eccentric component rotates, it can generate an eccentric force to cause the drive shaft to undergo lateral displacement.

[0011] Furthermore, the clamping and fixing assembly includes a clamping body, a long drive arm, a gripping part, a short drive arm, a rotating arm, and a clamping end. The clamping body is circumferentially arranged on the shaking platform. One end of the long drive arm is hinged to the upper part of the clamping body, and the other end of the long drive arm is provided with a gripping part. The lower end of the rotating arm is hinged to the lower part of the clamping body, and the upper end of the rotating arm is provided with a clamping end. One end of the short drive arm is hinged to the middle of the long drive arm, and the other end of the short drive arm is hinged to the middle of the rotating arm. By operating the gripping part, the long drive arm is rotated, and the short drive arm drives the rotating arm to rotate, so as to achieve circumferential clamping of the sealed container by the clamping end.

[0012] Furthermore, the first hinge of the driving long arm is rotatably connected to the upper hinge of the clamping body, the rotating arm is rotatably connected to the lower hinge of the clamping body, one end of the driving short arm is rotatably connected to the second hinge of the driving long arm, and the other end of the driving short arm is rotatably connected to the rotating arm; the clamping end includes a clamping block, a support rod, and a sliding seat, the sliding seat is slidably disposed on the rotating arm to adjust the longitudinal clamping position, and the clamping block is disposed on the sliding seat through the support rod; when the clamping and fixing assembly is in the closed state, the driving long arm and the rotating arm are approximately perpendicular, and the driving short arm overlaps with the driving long arm, thereby causing the direction of the force applied by the sealed container to the rotating arm to overlap with the extension direction of the driving long arm, and the driving long arm and the driving short arm can lock the rotation of the rotating arm.

[0013] Furthermore, the gripping part includes a handle and a locking end. Multiple locking holes are circumferentially arranged on the support platform corresponding to the position of the locking end. When the handle is pushed down to open the clamping and fixing component, the locking end can extend into the locking hole to prevent the shaking platform from rotating.

[0014] For the fluorescence detection method of microplastics, the fluorescence device described above is used, and the following steps are included: Step a: Collect the water to be tested and pour it into a sealed container, add the viscous fluorescent powder material, and place the sealed container on a shaking table; Step b: Adjust the contact position between the clamping block and the sealed container by operating the sliding seat and the clamping block, push the handle of the clamping and fixing assembly upward, and drive the long arm and the rotating arm to be in an approximately perpendicular state so that the clamping block is pressed against the side of the sealed container, and the clamping end is used to clamp and fix the sealed container. Step c: Start the drive motor to make the shaking table move circumferentially and laterally, so as to stir the water in the sealed container, prevent microplastics from agglomerating or adhering, and at the same time, fluorescently label the microplastics in the water to be tested. Step d: Irradiate the water to be tested in the sealed container with ultraviolet light for 2-3 minutes; Step e: After settling, remove the sediment at the bottom of the sealed container and use a fluorescence spectrometer to determine the concentration of fluorescent microplastics in the water to be tested.

[0015] Compared with the prior art, the present invention provides a microplastic fluorescence device and detection method, which has the following beneficial effects: 1. The fluorescent device of the present invention does not require the insertion of a stirring rod or other device into the water body during the mixing process of fluorescent powder and microplastic particles, thereby avoiding the microplastic particles from adhering to the surface of the stirring rod or other device during the mixing process and reducing the error in the detection of microplastic particles in the water body.

[0016] 2. This invention can control the lateral force output by the eccentric component by controlling the rotation speed of the drive motor, thereby controlling the shaking amplitude of the sealed container. Different motor output parameters can be set for microplastic particles of different sizes to ensure the full bonding of microplastic particles and fluorescent powder.

[0017] 3. The clamping and fixing assembly of the present invention has a self-locking function, which can prevent the rotating arm from loosening by self-locking through the linkage mechanism during the shaking of the sealed container. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the microplastic fluorescent device of the present invention; Figure 2 This is a schematic diagram of the internal structure of the microplastic fluorescent device of the present invention; Figure 3 This is a cross-sectional view of the microplastic fluorescent device of the present invention; Figure 4 This is a schematic diagram of the transmission connector of the present invention; Figure 5 This is a schematic diagram of the connection of the transmission connector of the present invention; Figure 6 This is a schematic diagram of the eccentric component of the present invention; Figure 7 This is a schematic diagram of the clamping and fixing assembly of the present invention; Figure 8 This is a detailed structural diagram of the clamping and fixing component of the present invention; Figure 9 This is a schematic diagram of the clamping and fixing component of the present invention in the locked state; In the picture: Eccentric component 1, tray 11, counterweight 12, fixing component 13, top cover 14; 2. Sliding support base, 21. Shaking table, 211. Through hole, 22. Omnidirectional rolling support, 23. Drive shaft, 24. Rotary shaft elastic stop; Clamping and fixing assembly 3, clamping body 31, upper hinge part 311, lower hinge part 312, driving long arm 32, first hinge part 321, second hinge part 322, grip part 33, handle 331, locking end 332, driving short arm 34, rotating arm 35, sliding adjustment groove 351, clamping end 36, clamping block 361, support rod 362, sliding seat 363; Limiting support 4, support platform 41, locking hole 411, drive shaft through hole 412, slide elastic stop 42, elastic stop block 421; 5. Sealed container; 6. Drive motor; 7. Motor bracket; Transmission connector 8, first flange 81, second flange 82, third flange 83, first connecting column 84, second connecting column 85, column body 851, input connection part 852, output connection part 853; Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] The present invention will now be described in detail with reference to the accompanying drawings. The microplastic fluorescent device and detection method of the present invention include a sliding support 2, a sealed container 5 fixed to the sliding support 2 by clamping and fixing components 3, a drive motor 6, and an eccentric component 1. The swaying stage 21 of the sliding support 2 is slidably supported in a limiting support 4 by an omnidirectional rolling support 22, wherein the limiting support 4 restricts the movement range of the swaying stage 21. Multiple clamping and fixing components 3 are provided at the upper end of the swaying stage 21, which can clamp and fix the sealed container 5. The clamping and fixing components 3 are self-locking when closed. A vertical drive shaft 23 is fixedly connected to the lower end of the swaying stage 21. An eccentric component 1 is provided at the middle of shaft 23 and below the platform of the limiting support 4. The output end of the drive motor 6 is connected to the lower end of the drive shaft 23 via a transmission connector 8. The collected water is placed in a sealed container 5, and then a viscous fluorescent powder material is poured in. The drive motor 6 drives the drive shaft 23 and the shaking platform 21 to rotate. The centrifugal force generated by the eccentric component 1 causes the shaking platform 21 to move laterally, thus fluorescently marking the water to be tested in the sealed container 5. The transmission connector 8 enables the output shaft of the drive motor 6 to rotate synchronously parallel to the drive shaft 23. By controlling the output speed of the drive motor 6 to gradually change, the eccentric component 1 generates a continuous and gradual centrifugal force.

[0021] This invention can control the lateral force output by the eccentric component by controlling the rotation speed of the drive motor, thereby controlling the shaking amplitude of the sealed container. Different motor output parameters can be set for microplastic particles of different sizes to ensure the full bonding of microplastic particles and fluorescent powder.

[0022] Specifically, as the speed of the drive motor 6 gradually increases, the centrifugal force generated by the eccentric component 1 gradually increases, causing the sealed container 5 on the shaking table 21 to rotate while producing a lateral displacement, and its motion trajectory is approximately the motion trajectory of the centrifugal line. Then, the speed of the drive motor 6 is gradually reduced, and the centrifugal force generated by the eccentric component 1 gradually decreases. Under the impact and push of the shaft elastic stop 24 and the slide elastic stop 42, the sealed container 5 on the shaking table 21 moves towards the center while rotating. By outputting different speeds at different phases of the drive motor 6, the sealed container 5 can be controlled to shake in a regular / irregular manner, so as to achieve thorough mixing of the water to be tested and the fluorescent powder in the sealed container 5.

[0023] See appendix Figure 3 The lower end of the swaying platform 21 is provided with a plurality of omnidirectional rolling supports 22 supported on the support platform 41 of the limiting support 4. The weight on the swaying platform 21 is borne by the omnidirectional rolling supports 22. The omnidirectional rolling supports 22 include a rolling seat and a ball confined in the rolling seat to achieve omnidirectional rolling support.

[0024] The omnidirectional rolling support 22 includes a sphere capable of omnidirectional rolling and a seat that confines the sphere within a certain space. The seat can be a symmetrical splicing assembly structure, which, after being fixed by a connecting device, can form a space to accommodate the rolling sphere.

[0025] The shaking platform 21 has a circular structure. Multiple sliding elastic stops 42 are arranged near the perimeter of the shaking platform 21 on the support platform 41. The elastic blocks 421 of each sliding elastic stop 42 are slidably mounted on the support platform via guide rods. A spring is sleeved on the guide rod between the elastic block 421 and the support platform. The elastic blocks 421 abut against the end face of the shaking platform 21 to achieve buffering and limiting of the shaking platform 21. The drive shaft 2 on the shaking platform 21... 3. A drive shaft through hole 412 passes through the middle of the support platform 41, wherein the diameter of the drive shaft through hole 412 is larger than the diameter of the drive shaft 23; a rotating shaft elastic stop 24 is also provided at the drive shaft through hole 412, the rotating shaft elastic stop 24 is arranged around the drive shaft 23 to achieve buffering and limiting of the drive shaft 23; wherein the sliding support 2 bears the weight through the omnidirectional rolling support 22, and achieves stable limiting support during the shaking process through the rotating shaft elastic stop 24 and the sliding seat elastic stop 42.

[0026] Specifically, the pivot elastic stop 24 may include a rolling abutment seat that can slide against the drive shaft 23. The rolling abutment seat is positioned below the support platform 41 by a guide rod, and a spring is provided on the guide rod to provide elastic cushioning.

[0027] The drive motor 6 is fixed below the support platform 41 by the motor bracket 7 to output torque. The eccentric component 1 is set in the middle of the drive shaft 23 and located between the transmission connector 8 and the rotating shaft elastic stop 24. The drive motor 6 outputs a gradually changing rotational motion to the drive shaft 23 through the transmission connector 8, so that the eccentric component 1 generates a gradually changing centrifugal force. The drive shaft 23 drives the shaking platform 21 to rotate and generate lateral movement, thereby realizing the fluorescent marking of the water to be tested in the sealed container 5.

[0028] See appendix Figure 4 and 5 The transmission connector 8 includes a first flange 81, a second flange 82, a third flange 83, a first connecting post 84, and a second connecting post 85. The first flange 81 is fixedly connected to the output shaft of the drive motor 6, and the third flange 83 is fixedly connected to the lower end of the drive shaft 23. The first flange 81 is drivenly connected to the second flange 82 through more than one first connecting post 84, and the second flange 82 is drivenly connected to the third flange 83 through more than one second connecting post 85. The number of first connecting posts 84 and second connecting posts 85 are the same and they are staggered on both sides of the second flange 82 circumferentially. The above connection structure allows the first flange 81, the second flange 82, and the third flange 83 to generate an external force other than a lateral rotational force while rotating. Force-driven relative displacement; the first connecting column 84 and the second connecting column 85 have the same structure and each includes a column body 851, an input connecting part 852 and an output connecting part 853. The input connecting part 852 and the output connecting part 853 are located at both ends of the column body 851. The column body 851 can rotate around the axis of the input connecting part 852 and the output connecting part 853; the first connecting column 84 is rotatably connected to the first flange 81 through the input connecting part 852, and the output connecting part 853 of the first connecting column 84 is rotatably connected to the second flange 82; the input connecting part 852 of the second connecting column 85 is rotatably connected to the second flange 82, and the output connecting part 853 of the second connecting column 85 is rotatably connected to the third flange 83.

[0029] See appendix Figure 6 The eccentric component 1 includes a tray 11, a counterweight 12, a fixing component 13, and an upper cover 14. The tray 11 and the upper cover 14 are fixed parallel to each other on the drive shaft 23. The tray 11 is divided into multiple phase regions, and each phase region can fix a different number of counterweights 12 through the fixing component 13. When the eccentric component 1 rotates, it can generate an eccentric force to cause the drive shaft 23 to produce a lateral displacement.

[0030] See appendix Figure 7The clamping and fixing assembly 3 includes a clamping body 31, a driving long arm 32, a gripping part 33, a driving short arm 34, a rotating arm 35, and a clamping end 36. The clamping body 31 is circumferentially arranged on the shaking table 21. One end of the driving long arm 32 is hinged to the upper part of the clamping body 31, and the other end of the driving long arm 32 is provided with the gripping part 33. The lower end of the rotating arm 35 is hinged to the lower part of the clamping body 31, and the upper end of the rotating arm 35 is provided with the clamping end 36. One end of the driving short arm 34 is hinged to the middle part of the driving long arm 32, and the other end of the driving short arm 34 is hinged to the middle part of the rotating arm 35. By operating the gripping part 33, the driving long arm 32 is rotated, and the driving short arm 34 drives the rotating arm 35 to rotate, so as to achieve circumferential clamping of the sealed container 5 by the clamping end 36.

[0031] See appendix Figure 8 The first hinge portion 321 of the driving long arm 32 is rotatably connected to the upper hinge portion 311 of the clamping body 31, and the rotating arm 35 is rotatably connected to the lower hinge portion 312 of the clamping body 31. One end of the driving short arm 34 is rotatably connected to the second hinge portion 322 of the driving long arm 32, and the other end of the driving short arm 34 is rotatably connected to the rotating arm 35. The clamping end 36 includes a clamping block 361, a support rod 362, and a sliding seat 363. The sliding seat 363 is slidably disposed on the rotating arm 35 to adjust the longitudinal clamping position, and the clamping block 361 is disposed on the sliding seat 363 through the support rod 362. When the clamping and fixing assembly 3 is in the closed state, the driving long arm 32 and the rotating arm 35 are approximately perpendicular, and the driving short arm 34 overlaps with the driving long arm 32, thereby causing the direction of the force applied by the sealed container 5 to the rotating arm 35 to overlap with the extension direction of the driving long arm 32. The driving long arm 32 and the driving short arm 34 can lock the rotation of the rotating arm 35.

[0032] Specifically, the drive arm 32 can be a hollow structure, with the rotating arm 35 passing through it. The drive arm 34 is positioned within the hollow structure of the drive arm 32. When the clamping and fixing assembly 3 is closed, the drive arm 34 is completely contained within the hollow structure of the drive arm 32 and overlaps with it. The direction of the thrust from the sealing container 5 on the rotating arm 35 overlaps with the extension direction of the drive arm 34 and the drive arm 32, thus preventing the drive arm 34 and the drive arm 32 from rotating when subjected to the thrust from the sealing container 5, achieving self-locking.

[0033] The grip portion 33 includes a handle 331 and a locking end 332. Multiple locking holes 411 are circumferentially arranged on the support platform 41 corresponding to the position of the locking end 332. (See attached diagram) Figure 3 When the handle 331 is pushed down to open the clamping and fixing assembly 3, the locking end 332 can extend into the locking hole 411 to prevent the shaking table 21 from rotating.

[0034] The microplastic fluorescence detection method of the present invention includes the following steps: Step a: Collect the water to be tested and pour it into a sealed container 5, add a sticky fluorescent powder material, and place the sealed container 5 on the shaking table 21; Step b: Adjust the contact position between the clamping block 361 and the sealed container 5 by operating the sliding seat 363 and the clamping block 361, push the handle 331 of the clamping and fixing assembly 3 upward, drive the long arm 32 and the rotating arm 35 to be in an approximately perpendicular state so that the clamping block 361 is pressed against the side of the sealed container 5, and the clamping end 36 is used to clamp and fix the sealed container 5. Step c: Start the drive motor 6 to make the shaking table 21 move circumferentially and laterally, so as to stir the water in the sealed container 5, prevent microplastics from agglomerating or adhering, and at the same time, fluorescently label the microplastics in the water to be tested. Step d: Irradiate the water to be tested in the sealed container 5 with ultraviolet light for 2-3 minutes; Step e: After settling, remove the sediment at the bottom of the sealed container 5, and use a fluorescence spectrometer to determine the concentration of fluorescent microplastics in the water to be tested.

[0035] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A microplastic fluorescent device, comprising a sliding support (2), a sealed container (5) fixed to the sliding support (2) by a clamping and fixing assembly (3), a drive motor (6), and an eccentric assembly (1), characterized in that: The swaying platform (21) of the sliding support base (2) is slidably supported in the limiting support (4) by the omnidirectional rolling support (22), wherein the limiting support (4) restricts the movement range of the swaying platform (21); the upper end of the swaying platform (21) is provided with a plurality of clamping and fixing components (3), which can clamp and fix the sealed container (5), wherein the clamping and fixing components (3) can self-lock when closed; the lower end of the swaying platform (21) is fixedly connected to a vertical drive shaft (23), and an eccentric component (1) is provided in the middle of the drive shaft (23) and below the platform of the limiting support (4); the output end of the drive motor (6) is connected to the lower end of the drive shaft (23) through a transmission connector (8); The collected water is placed in a sealed container (5), and then a viscous fluorescent powder material is poured in. The drive motor (6) drives the drive shaft (23) and the shaking table (21) to rotate. The centrifugal force generated by the eccentric component (1) causes the shaking table (21) to move laterally, and the water to be tested in the sealed container (5) is fluorescently marked. The transmission connector (8) makes the output shaft of the drive motor (6) rotate synchronously parallel to the drive shaft (23). By controlling the output speed of the drive motor (6) to gradually change, the eccentric component (1) generates a continuous and gradual centrifugal force.

2. The microplastic fluorescent device according to claim 1, characterized in that: The lower end of the swaying platform (21) is provided with multiple omnidirectional rolling supports (22) supported on the support platform (41) of the limiting support (4). The omnidirectional rolling supports (22) bear the weight of the swaying platform (21). The omnidirectional rolling supports (22) include a rolling seat and a ball confined in the rolling seat to achieve omnidirectional rolling support.

3. The microplastic fluorescent device according to claim 2, characterized in that: The swaying platform (21) has a circular structure. Multiple sliding elastic stops (42) are provided on the support platform (41) near the perimeter of the swaying platform (21). The elastic blocks (421) of the sliding elastic stops (42) are slidably mounted on the support platform via guide rods. A spring is sleeved on the guide rod between the elastic blocks (421) and the support platform. The elastic blocks (421) abut against the end face of the swaying platform (21) to achieve buffering and limiting of the swaying platform (21). The drive shaft (23) on the swaying platform (21) passes through the drive shaft through hole (412) in the middle of the support platform (41). The diameter of the drive shaft through hole (412) is larger than the diameter of the drive shaft (23). A rotating shaft elastic stop (24) is also provided at the drive shaft through hole (412). The rotating shaft elastic stop (24) is arranged around the drive shaft (23) to achieve buffering and limiting of the drive shaft (23). The sliding support seat (2) bears the weight through the omnidirectional rolling support (22), and achieves stable limiting support during the shaking process through the rotating shaft elastic stop (24) and the sliding seat elastic stop (42).

4. A microplastic fluorescent device according to claim 3, characterized in that: The drive motor (6) is fixed below the support platform (41) by the motor bracket (7) to output torque. The eccentric component (1) is set in the middle of the drive shaft (23) and located between the transmission connector (8) and the rotating shaft elastic stop (24). The drive motor (6) outputs a gradually changing rotational motion to the drive shaft (23) through the transmission connector (8), so that the eccentric component (1) generates a gradually changing centrifugal force. The drive shaft (23) drives the shaking platform (21) to rotate and generate lateral movement, thereby realizing the fluorescent marking of the water to be tested in the sealed container (5).

5. A microplastic fluorescent device according to claim 4, characterized in that: The transmission connector (8) includes a first flange (81), a second flange (82), a third flange (83), a first connecting column (84), and a second connecting column (85); the first flange (81) is fixedly connected to the output shaft of the drive motor (6), and the third flange (83) is fixedly connected to the lower end of the drive shaft (23); the first flange (81) is driven to the second flange (82) through more than one first connecting column (84), and the second flange (82) is driven to the third flange (83) through more than one second connecting column (85), wherein the number of first connecting columns (84) and second connecting columns (85) is the same and they are staggered on both sides of the circumference of the second flange (82); the above connection structure allows the first flange (81), the second flange (82), and the third flange (83) to generate a relative displacement in the lateral direction driven by an external force other than the rotational force while rotating; The first connecting column (84) and the second connecting column (85) have the same structure and both include a column body (851), an input connecting part (852) and an output connecting part (853). The input connecting part (852) and the output connecting part (853) are located at both ends of the column body (851). The column body (851) can rotate around the axis of the input connecting part (852) and the output connecting part (853). The first connecting column (84) is rotatably connected to the first flange (81) through the input connecting part (852). The output connecting part (853) of the first connecting column (84) is rotatably connected to the second flange (82). The input connecting part (852) of the second connecting column (85) is rotatably connected to the second flange (82). The output connecting part (853) of the second connecting column (85) is rotatably connected to the third flange (83).

6. A microplastic fluorescent device according to claim 5, characterized in that: The eccentric component (1) includes a tray (11), a counterweight (12), a fixing component (13), and an upper cover (14). The tray (11) and the upper cover (14) are fixed parallel to each other on the drive shaft (23). The tray (11) is divided into multiple phase regions, and each phase region can be fixed with a different number of counterweights (12) by the fixing component (13). When the eccentric component (1) rotates, it can generate an eccentric force to cause the drive shaft (23) to produce a lateral displacement.

7. A microplastic fluorescent device according to claim 6, characterized in that: The clamping and fixing assembly (3) includes a clamping body (31), a driving long arm (32), a gripping part (33), a driving short arm (34), a rotating arm (35), and a clamping end (36). The clamping body (31) is circumferentially arranged on the shaking table (21). One end of the driving long arm (32) is hinged to the upper part of the clamping body (31), and the other end of the driving long arm (32) is provided with a gripping part (33). The lower end of the rotating arm (35) is hinged to the lower part of the clamping body (31), and the upper end of the rotating arm (35) is provided with a clamping end (36). One end of the drive short arm (34) is hinged to the middle of the drive long arm (32), and the other end of the drive short arm (34) is hinged to the middle of the rotating arm (35). By operating the gripping part (33), the drive long arm (32) is rotated, and the drive short arm (34) drives the rotating arm (35) to rotate, so as to achieve the clamping end (36) to clamp the sealed container (5) circumferentially.

8. A microplastic fluorescent device according to claim 7, characterized in that: The first hinge (321) of the driving long arm (32) is rotatably connected to the upper hinge (311) of the clamping body (31), the rotating arm (35) is rotatably connected to the lower hinge (312) of the clamping body (31), one end of the driving short arm (34) is rotatably connected to the second hinge (322) of the driving long arm (32), and the other end of the driving short arm (34) is rotatably connected to the rotating arm (35); the clamping end (36) includes a clamping block (361), a support rod (362), and a sliding seat (363). The sliding seat (363) is slidably disposed on the rotating arm (35) to adjust the longitudinal clamping position, and the clamping block (361) is disposed on the sliding seat (363) through the support rod (362); When the clamping and fixing assembly (3) is in the closed state, the driving long arm (32) is approximately perpendicular to the rotating arm (35), and the driving short arm (34) overlaps with the driving long arm (32), so that the direction of the force applied by the sealed container (5) to the rotating arm (35) overlaps with the extension direction of the driving long arm (32), and the driving long arm (32) and the driving short arm (34) can lock the rotation of the rotating arm (35).

9. A microplastic fluorescent device according to claim 8, characterized in that: The grip (33) includes a handle (331) and a locking end (332). The support platform (41) is provided with multiple locking holes (411) in the circumferential direction corresponding to the position of the locking end (332). When the handle (331) is pushed down to open the clamping and fixing component (3), the locking end (332) can extend into the locking hole (411) to prevent the shaking platform (21) from rotating.

10. A method for detecting microplastic fluorescence, using the fluorescence device described in any one of claims 8-9, characterized in that, Includes the following steps: Step a, collect the water to be tested and pour it into a sealed container (5), put in a sticky fluorescent powder material, and place the sealed container (5) on a shaking table (21); Step b: Adjust the contact position of the clamping block (361) and the sealing container (5) by operating the sliding seat (363) and the clamping block (361), push the handle (331) of the clamping and fixing assembly (3) upward, and drive the long arm (32) and the rotating arm (35) to be in an approximately perpendicular state so that the clamping block (361) presses against the side of the sealing container (5), and the clamping end (36) achieves clamping and fixing of the sealing container (5); Step c, start the drive motor (6) to make the shaking table (21) move circumferentially and laterally, so as to stir the water in the sealed container (5), prevent microplastics from agglomerating or adhering, and at the same time, fluorescently label the microplastics in the water to be tested. Step d: Irradiate the water to be tested in the sealed container (5) with ultraviolet light for 2-3 minutes; Step e: After standing, remove the sediment at the bottom of the sealed container (5) and use a fluorescence spectrometer to determine the concentration of fluorescent microplastics in the water to be tested.

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