Device for analyzing microplastics in water
By designing a device including a fluid conductor, an interceptor network and a drainage assembly, the problems of complex operation and microplastic accumulation of microplastics in water bodies in the prior art are solved, and efficient and simple microplastic analysis and research are achieved.
Patent Information
- Application Number
- CN202420841492.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-22
- Publication Date
- 2025-03-28
- Estimated Expiration
- 2034-04-22
AI Technical Summary
The device used in the prior art for microplastic analysis in water bodies is complex in operation, low in work efficiency, and prone to microplastic accumulation, which increases the difficulty of analysis and research.
A device including a fluid conductor, an interceptor network and a drainage assembly is designed to enter the fluid conducting chamber through the water flow in the fluid conductor, and the microplastic is intercepted under the action of the interceptor network, and the imaging components are used for amplification and capture, so as to achieve multiple interception and analysis of the microplastic.
It realizes microplastic analysis in water with simple operation, short time and high working efficiency, reduces the accumulation of microplastics in the inflow channel and avoids interference to analysis and research.
Smart Images
Figure CN222689650U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of microplastic monitoring, and more specifically, relates to a device for analyzing microplastics in water. Background Art
[0002] Plastic pollution in aquatic environments (marine and freshwater) is becoming increasingly serious. In view of the harmfulness of microplastics, more and more monitoring, research and analysis of microplastics in water bodies are being carried out. Microplastic analysis projects include microplastic abundance, microplastic particle size, microplastic material type content, microplastic shape type content, microplastic color type content, microplastic particle size type content, etc.
[0003] In the prior art, in order to monitor the abundance and particle size of microplastics, it is necessary to collect water samples from the water body into a container through a water pump, and then separate and collect the microplastics in the water body, and analyze the richness and particle size of the microplastic types. After the detection is completed, the water sample is discharged back to the water source. The operation process is complicated, time-consuming, and has low work efficiency. In addition, microplastics are prone to accumulate in sampling containers that have been used for a long time, which increases the difficulty of the analysis and research process. Utility Model Content
[0004] The purpose of the utility model is to provide a device for analyzing microplastics in water, aiming to solve the technical problems in the prior art of detecting the richness and particle size of microplastics in water bodies, such as complex operation, low working efficiency, and easy accumulation of microplastics, which increases the difficulty of analysis and research.
[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: to provide a device for analyzing microplastics in water, comprising:
[0006] A liquid guide device, wherein a cylindrical liquid guide cavity is provided inside; a water inlet channel is provided on the liquid guide device, a water outlet is provided at one end of the liquid guide device, and the water inlet channel and the water outlet are both connected to the liquid guide cavity; a direction in which water in the liquid guide cavity flows toward the water outlet is defined as a first direction; a camera assembly is provided at the other end of the liquid guide device along the first direction;
[0007] an interception net, rotatably disposed in the liquid guiding cavity; in the first direction, the interception net is placed between the water inlet channel and the water outlet; the interception net extends perpendicularly to the first direction, and when the interception net rotates, the interception net flips from one side facing the water outlet to the other side facing the water outlet; and
[0008] A drainage component, one end of which is disposed in the water inlet channel and communicated with the liquid guiding cavity, and the other end of which extends out of the liquid guiding device and outwards;
[0009] Wherein, the water inlet channel and the drainage assembly are arranged obliquely to the radial direction of the liquid guiding cavity and extend toward the water outlet.
[0010] In a possible implementation, the drainage component includes:
[0011] A connecting pipe, one end of which is screwed into the water inlet channel and the other end of which extends out of the liquid guide;
[0012] A flow guide pipe, one end of which is connected to the portion of the connecting pipe extending into the water inlet channel, and the other end of which is communicated with the liquid guide cavity;
[0013] Wherein, the connecting pipe and the guide pipe have the same inclination angle as the water inlet channel.
[0014] In a possible implementation, a water inlet is formed at the connection between the water inlet channel and the liquid guiding cavity; a sedimentation tank is also provided in the liquid guiding device, and the sedimentation tank and the water inlet are symmetrically arranged along the radial direction of the liquid guiding cavity.
[0015] In some embodiments, the liquid guide device is also connected to a discharge plug, and the discharge plug is screwed to the bottom of the sedimentation tank along the radial direction of the liquid guide cavity.
[0016] In a possible implementation, the liquid guide device includes:
[0017] An inlet column, one end of which is connected to the camera assembly; a first cavity is provided in the inlet column, and the water inlet channel is provided on the outer peripheral surface of the inlet column, and the water inlet channel is connected to the first cavity;
[0018] An intermediate component is arranged at the other end of the inlet column; a second cavity is arranged in the intermediate component, and the outlet is arranged at one end of the intermediate component away from the inlet column, and the outlet is connected to the second cavity; the interception net is arranged in the second cavity; and
[0019] A drainage column connected to the intermediate component and covered at the water outlet;
[0020] Wherein, the first cavity and the second cavity together constitute the liquid guiding cavity.
[0021] In some embodiments, the intermediate component includes:
[0022] Two sets of quick-change clamps are arranged at intervals along the first direction; one of the quick-change clamps is connected to the inlet column, and the other quick-change clamp is connected to the drain column;
[0023] The two groups of connecting valve bodies are relatively fixed along the first direction, and the two opposite ends of the two groups of connecting valve bodies are correspondingly connected to the two groups of quick-change clamps; the interception net is rotatably connected in the connecting valve body.
[0024] In some embodiments, the inlet column is further provided with an overflow port connected to the liquid guiding cavity.
[0025] In a possible implementation, a glass cover plate arranged parallel to the intercepting net is provided in the liquid guide device, and the glass cover plate divides the liquid guide device into the liquid guide cavity and an installation cavity adjacent to the liquid guide cavity.
[0026] In some embodiments, the camera assembly includes:
[0027] A mounting seat, fixed on the liquid guide device;
[0028] The camera microscope is fixed on the mounting seat, and the lens end of the camera microscope passes through the mounting seat and extends into the mounting cavity.
[0029] Exemplarily, a plurality of groups of fill lights are provided in the installation cavity, and the plurality of groups of fill lights are arranged at intervals along the circumference of the installation cavity.
[0030] Compared with the prior art, the scheme shown in the embodiment of the present application is that water flows into the liquid guide cavity through the water inlet channel, and when flowing through the interception net, the microplastics in the water body are intercepted by the interception net, so that the microplastics in the water body can be magnified and captured by the camera assembly, so as to be transmitted to the computer for analysis and research; after the capture process is completed, the interception net is flipped in the liquid guide cavity so that the interception surface of the interception net faces the water outlet, so that the intercepted microplastics are washed down under the action of the water flow, thereby intercepting the next group of microplastics again on the other side of the interception net, thereby realizing the sampling of multiple groups of microplastics in the water body, so as to study and analyze the richness and particle size of microplastics in the water body through multiple batches of interception, amplification and capture actions, which is simple to operate, short time consumption and high work efficiency. In addition, the inlet channel and the drainage assembly set in the present application are inclined to the radial direction of the liquid guide cavity and extend toward the water outlet, which can reduce the accumulation of microplastics at the radial extension end of the inlet channel, avoid the accumulated microplastics from affecting the capture of the camera assembly and subsequent analysis and research, thereby avoiding the increase in the difficulty of analysis and research. BRIEF DESCRIPTION OF THE DRAWINGS
[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0032] Figure 1 A schematic diagram of the cross-sectional structure of a device for analyzing microplastics in water provided by an embodiment of the utility model;
[0033] Figure 2 For attachment Figure 1 An enlarged structural diagram of the middle inlet pipe fitting;
[0034] Figure 3 A schematic diagram of the structure of a device for analyzing microplastics in water provided by an embodiment of the utility model.
[0035] In the figure:
[0036] 1. Liquid guide; 11. Inlet column; 111. Glass cover; 112. First cavity; 113. Installation cavity; 114. Water inlet channel; 115. Overflow port; 116. Sedimentation tank; 117. Outlet plug; 12. Intermediate component; 121. Quick-change fixture; 122. Connecting valve body; 123. Second cavity; 124. Water outlet; 13. Drainage column; 2. Intercepting net; 3. Camera component; 31. Mounting seat; 32. Camera microscope; 33. Fill light; 4. Drainage component; 41. Connecting pipe; 42. Guide pipe; 5. Mounting bracket; 6. Driving motor; 7. Fixed bracket. DETAILED DESCRIPTION
[0037] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.
[0038] It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on the other element or indirectly on the other element. It should be understood that the terms "length", "width", "upper", "lower", "front", "back", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.
[0039] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "several" is two or more, unless otherwise clearly and specifically defined.
[0040] For ease of understanding, the present application uses the attached Figure 1 The direction indicated by the arrow A is the first direction.
[0041] Please also read Figures 1 to 3 The device for analyzing microplastics in water provided by the utility model is now described. The device for analyzing microplastics in water comprises a liquid guide 1, an interception net 2 and a drainage component 4; a columnar liquid guide cavity is provided inside the liquid guide 1; a water inlet channel 114 is provided on the liquid guide 1, a water outlet 124 is provided at one end of the liquid guide 1, and the water inlet channel 114 and the water outlet 124 are both connected to the liquid guide cavity; the direction in which the water in the liquid guide cavity flows toward the water outlet 124 is defined as a first direction; a camera component 3 is provided at the other end of the liquid guide 1 along the first direction; the interception net 2 is rotatably arranged in the liquid guide cavity; in the first direction On the top, the interception net 2 is placed between the water inlet channel 114 and the water outlet 124; the interception net 2 extends in a direction perpendicular to the first direction, and when the interception net 2 rotates, the interception net 2 flips from one side facing the water outlet 124 to the other side facing the water outlet 124; one end of the drainage component 4 is arranged in the water inlet channel 114 and is connected to the liquid guiding cavity, and the other end extends out of the liquid guiding device 1 and extends outward; wherein, the water inlet channel 114 and the drainage component 4 are inclined to the radial arrangement of the liquid guiding cavity, and extend toward the direction of the water outlet 124.
[0042] It should be understood that the interception net 2 is rotatably connected to the liquid guide device 1, and one side of the interception net 2 faces the water outlet 124. When water flows through, the microplastics in the water flow are intercepted by the other side of the interception net 2, so that the camera component 3 can magnify and capture the microplastics therein; after the capture is completed, the interception net 2 rotates and flips °, so that the original interception surface of the interception net 2 turns to the water outlet 124, and under the action of the water flow, the microplastics on the original interception surface of the interception net 2 are washed away, and the side of the interception net 2 facing away from the water outlet 124 again acts as the interception surface of the microplastics in the water flow for the next interception.
[0043] It should be noted that the camera assembly 3 is used to magnify the microplastics intercepted by the interception net 2 and capture the magnified photos, so that the captured microplastics can be analyzed by a computer electrically connected to the camera assembly 3. It should be understood that the specific structure and working principle of the camera assembly 3, as well as the electrical connection method and connection derivation principle between the camera assembly 3 and the computer are all prior art and will not be described in detail here.
[0044] Compared with the prior art, the device for analyzing microplastics in water provided by the utility model is that water flows into the liquid guide cavity through the water inlet channel 114, and when flowing through the interception net 2, the microplastics in the water body are intercepted by the interception net 2, so that the microplastics in the water body can be magnified and captured by the camera component 3, so as to be transmitted to the computer for analysis and research; after the capture process is completed, the interception net 2 is turned over in the liquid guide cavity, so that the interception surface of the interception net 2 faces the water outlet 124, so that the intercepted microplastics are washed down under the action of the water flow, thereby on the other side of the interception net 2 The next group of microplastics is intercepted again, thereby sampling multiple groups of microplastics in the water body, so that the richness and particle size of the microplastics in the water body can be studied and analyzed through multiple batches of interception, amplification and capture actions. The operation is simple, time-saving and work efficiency is high; and the inlet channel and drainage component 4 set in the present application are inclined to the radial direction of the liquid guide cavity and extend toward the water outlet 124, which can reduce the accumulation of microplastics at the radial extension end of the inlet channel, avoid the accumulated microplastics from affecting the capture and subsequent analysis and research of the camera component 3, thereby avoiding the increase in the difficulty of analysis and research.
[0045] See also Figure 2 In a possible implementation, the drainage assembly 4 includes a connecting tube 41 and a guide tube 42; one end of the connecting tube 41 is screwed into the water inlet channel 114, and the other end extends outside the liquid guide 1; one end of the guide tube 42 is connected to the part of the connecting tube 41 extending into the water inlet channel 114, and the other end is connected to the liquid guide cavity; wherein the connecting tube 41 and the guide tube 42 have the same inclination angle with the water inlet channel 114.
[0046] A connecting pipe 41 is provided to connect the drainage assembly 4 to the liquid guide device 1, and a guiding pipe 42 is provided to guide the water flow introduced from the connecting pipe 41 into the liquid guide cavity along a direction inclined to the liquid guide cavity; and the connecting pipe 41 and the guiding pipe 42 are made to have the same inclination angle as the water inlet channel 114, so that the water flow is guided into the liquid guide cavity along the inclined water inlet channel 114, thereby preventing the water flow from directly flushing the inner wall of the liquid guide cavity.
[0047] It should be understood that if the inlet channel is perpendicular to the flow direction of water in the liquid guiding cavity, the water needs to turn when entering the liquid guiding cavity from the inlet channel, and after working for a long time, microplastics are likely to accumulate at the turning point. If the accumulated microplastics are not cleaned up in time, it is easy to affect the shooting and recording of the camera component 3, and then affect the final analysis and research results; however, in the present application, the inlet channel is tilted to transition the water flow at the intersection of the inlet channel and the liquid guiding cavity, avoid the accumulation of microplastics and other impurities, and allow the water flow to smoothly reach the interception net 2, thereby improving the accuracy of analysis and research.
[0048] See also Figure 2In a possible implementation, a water inlet is formed at the connection between the water inlet channel 114 and the liquid guiding cavity; a sedimentation tank 116 is also provided in the liquid guiding device 1, and the sedimentation tank 116 and the water inlet are symmetrically arranged along the radial direction of the liquid guiding cavity.
[0049] In addition, it should be noted that the inclined setting of the drainage component 4 and the inlet channel can achieve water flow transition and slow down the accumulation of microplastics, but it cannot completely eliminate them. Therefore, a sedimentation tank 116 corresponding to the water inlet position is set so that microplastics and impurities can accumulate in the sedimentation tank 116, avoiding the capture of the image camera component 3 when they accumulate in the liquid guide cavity.
[0050] See also Figure 2 In some embodiments, the liquid guide device 1 is also connected to a discharge plug 117, and the discharge plug 117 is screwed to the bottom of the sedimentation tank 116 along the radial direction of the liquid guide cavity.
[0051] By setting the outlet plug 117, the liquid guide cavity can be closed when the device is working normally, and after a period of use, the impurities accumulated in the sedimentation tank 116 can be discharged through the outlet plug 117 to achieve timely and regular cleaning and avoid interference from accumulated impurities and microplastics.
[0052] See also Figure 1 In some possible embodiments, the liquid guide 1 includes an inlet column 11, an intermediate component 12 and a drainage column 13; one end of the inlet column 11 is connected to the camera component 3; a first cavity 112 is provided in the inlet column 11, and an inlet channel 114 is provided on the outer peripheral surface of the inlet column 11, and the inlet channel 114 is communicated with the first cavity 112; the intermediate component 12 is provided at the other end of the inlet column 11; a second cavity 123 is provided in the intermediate component 12, and a water outlet 124 is provided at one end of the intermediate component 12 away from the inlet column 11, and the water outlet 124 is communicated with the second cavity 123; an interception net 2 is provided in the second cavity 123; the drainage column 13 is connected to the intermediate component 12, and a cover is provided at the water outlet 124; wherein, the first cavity 112 and the second cavity 123 together constitute a liquid guide cavity.
[0053] Specifically, the above-mentioned mounting bracket 5 and the driving motor 6 are connected to the corresponding intermediate component 12; the inlet column 11 is used to introduce water from the water inlet channel 114, a filter is arranged in the intermediate component 12, the above-mentioned mounting bracket 5 is installed on the outside, and the power output end of the driving motor 6 extends into the second cavity 123 of the intermediate component 12 and is connected to the interception net 2; the drainage column 13 is used to guide the water flow discharged from the water outlet 124 and the flushed microplastics out of the liquid guide device 1.
[0054] Specifically, water flows into the first cavity 112 from the water inlet channel 114 , flows through the interception net 2 of the second cavity 123 , and then is discharged from the water outlet 124 into the drainage column 13 , and is guided out of the liquid guide 1 through the drainage column 13 .
[0055] See also Figure 1 In some embodiments, the intermediate component 12 includes two groups of quick-change clamps 121 and two groups of connecting valve bodies 122; the two groups of quick-change clamps 121 are arranged at intervals along the first direction; one of the quick-change clamps 121 is connected to the inlet column 11, and the other quick-change clamp 121 is connected to the drainage column 13; the two groups of connecting valve bodies 122 are relatively fixed along the first direction, and the two opposite ends of the two groups of connecting valve bodies 122 are correspondingly connected to the two groups of quick-change clamps 121; an interception net 2 is rotatably connected inside the connecting valve body 122.
[0056] The above-mentioned intercepting net 2 is installed in the connecting valve body 122 and is fixed to the mounting bracket 5 so that the driving motor 6 can drive the internal intercepting net 2 to rotate; two sets of quick-change clamps 121 are used to connect the connecting valve body 122 to the drainage column 13 on the front side of the first direction and the inlet column 11 on the rear side respectively.
[0057] It should be understood that the cross-sectional size of the second cavity 123 inside the connecting valve body 122 is smaller than the cross-sectional size of the first cavity 112 in the inlet column 11, so as to reduce the resistance when the interception net 2 is flipped and achieve effective interception of microplastics in the water flow.
[0058] See also Figure 1 In some embodiments, the inlet column 11 is further provided with an overflow port 115 connected to the liquid guiding cavity.
[0059] The overflow port 115 is provided so that when the interception net 2 blocks the liquid guiding cavity and causes water siltation, the excess water can be discharged through the overflow port 115 to avoid excessive water pressure in the liquid guiding cavity affecting the safety and stability of the liquid guiding device 1.
[0060] See also Figure 1 , illustratively, in the first direction, the overflow port 115 is located between the water inlet channel 114 and the camera assembly 3 ; the overflow port 115 and the water inlet channel 114 are spaced apart along the circumference of the inlet column 11 .
[0061] The overflow port 115 and the water inlet channel 114 are arranged at reasonable intervals to avoid the overflow port 115 and the water inlet channel 114 being concentrated on one side of the inlet column 11, causing stress concentration in the inlet column 11 and affecting the safety of the inlet column 11; at the same time, a water flow path is formed between the water inlet channel 114 and the overflow port 115 to guide the water flow when the water pressure is high.
[0062] In some possible embodiments, the water inlet channel 114 is connected to the water body to be tested through a water pump.
[0063] A water pump is used to direct water from the water inlet channel 114 into the liquid guide device 1 .
[0064] Optionally, a liquid storage chamber may be provided above the water inlet channel 114 , and the water flow in the liquid storage chamber may be guided into the liquid guide device 1 by gravity.
[0065] Furthermore, the device for analyzing microplastics in water also includes a fixed bracket 7, which is used to support the liquid guide 1, the camera assembly 3 and the mounting bracket 5, and the driving motor 6.
[0066] See also Figure 1 In some possible embodiments, a glass cover plate 111 is provided in the liquid guide device 1 and is arranged parallel to the interception net 2. The glass cover plate 111 divides the liquid guide device 1 into a liquid guide cavity and an installation cavity 113 adjacent to the liquid guide cavity.
[0067] A glass cover plate 111 is provided to separate the installation cavity 113 and the liquid guiding cavity. At the same time, the glass cover plate 111 can facilitate the lens of the camera component 3 to capture images of microplastics without affecting the camera component 3's lens end capturing and imaging the microplastics on the interception net 2.
[0068] See also Figure 3 In some embodiments, the camera assembly 3 includes a mounting seat 31 and a camera microscope 32; the mounting seat 31 is fixed on the liquid guide device 1; the camera microscope 32 is fixed on the mounting seat 31, and the lens end of the camera microscope 32 passes through the mounting seat 31 and extends into the mounting cavity 113.
[0069] Specifically, the mounting base 31 is used to fix the camera microscope 32 at the end of the liquid guide device 1 to ensure the stability of the camera microscope 32 during the capture process, thereby improving the accuracy of the analysis results of microplastics in the water body.
[0070] See also Figure 1 Exemplarily, a plurality of groups of fill lights 33 are provided in the installation cavity 113 , and the plurality of groups of fill lights 33 are arranged at intervals along the circumference of the installation cavity 113 .
[0071] A fill light 33 is provided to supplement the light in the mounting cavity 113 so that the camera microscope 32 can capture images of microplastics through the glass cover 111 .
[0072] By providing a plurality of groups of fill-in lights 33 and arranging the fill-in lights 33 at equal intervals, the light in the installation cavity 113 is made uniform, thereby improving the capture effect.
[0073] See also Figure 1 or Figure 3In some possible embodiments, the device for analyzing microplastics in water also includes a mounting bracket 5 and a driving motor 6; the mounting bracket 5 is fixed on the outer peripheral surface of the liquid guide device 1; in the first direction, the mounting bracket 5 is located between the water inlet channel 114 and the water outlet 124; the driving motor 6 is arranged on the mounting bracket 5; the power output end of the driving motor 6 penetrates into the liquid guide device 1 and is connected to the interception net 2, so as to drive the interception net 2 to rotate.
[0074] The mounting bracket 5 is used to fix the driving motor 6 on the liquid guide device 1 to ensure stable support of the driving motor 6; the driving motor 6 is used to drive the interception net 2 to rotate, so that the interception net 2 is flipped from one side facing the water outlet 124 to the other side facing the water outlet 124, thereby flushing the intercepted microplastics and re-intercepting the next group of microplastics through the opposite side.
[0075] It should be understood that the intercepting net 2 used in the present application includes an annular bracket and a filter structure arranged in the annular bracket, and the annular bracket is fixed to the power output end of the driving motor 6 so that the annular bracket drives the filter structure to flip.
[0076] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A device for analyzing microplastics in water, characterized in that: include: A liquid guide (1) is provided with a columnar liquid guide cavity inside; a water inlet channel (114) is provided on the liquid guide (1); a water outlet (124) is provided at one end of the liquid guide (1), and the water inlet channel (114) and the water outlet (124) are both connected to the liquid guide cavity; a direction in which water in the liquid guide cavity flows toward the water outlet (124) is defined as a first direction; a camera assembly (3) is provided at the other end of the liquid guide (1) along the first direction; an interception net (2) rotatably disposed in the liquid guiding cavity; in the first direction, the interception net (2) is disposed between the water inlet channel (114) and the water outlet (124); the interception net (2) extends perpendicularly to the first direction, and when the interception net (2) rotates, the interception net (2) turns from one side facing the water outlet (124) to the other side facing the water outlet (124); and A drainage component (4), one end of which is disposed in the water inlet channel (114) and communicates with the liquid guiding cavity, and the other end of which extends out of the liquid guiding device (1) and outwards; Wherein, the water inlet channel (114) and the drainage assembly (4) are arranged obliquely to the radial direction of the liquid guiding cavity and extend in the direction of the water outlet (124).
2. The device for analyzing microplastics in water according to claim 1, characterized in that: The drainage component (4) comprises: A connecting pipe (41), one end of which is screwed into the water inlet channel (114) and the other end of which extends out of the liquid guide (1); A flow guide tube (42), one end of which is connected to the portion of the connecting tube (41) extending into the water inlet channel (114), and the other end of which is in communication with the liquid guide cavity; Wherein, the connecting pipe (41) and the guide pipe (42) have the same inclination angle as the water inlet channel (114).
3. The device for analyzing microplastics in water according to claim 1, characterized in that: The connection between the water inlet channel (114) and the liquid guiding cavity forms a water inlet; a sedimentation tank (116) is also provided in the liquid guiding device (1), and the sedimentation tank (116) and the water inlet are symmetrically arranged along the radial direction of the liquid guiding cavity.
4. The device for analyzing microplastics in water according to claim 3, characterized in that: The liquid guide device is also connected to a discharge plug (117), and the discharge plug (117) is screwed to the bottom of the sedimentation tank (116) along the radial direction of the liquid guide cavity.
5. The device for analyzing microplastics in water according to claim 1, characterized in that: The liquid guide device (1) comprises: An inlet column (11), one end of which is connected to the camera assembly (3); a first cavity (112) is provided in the inlet column (11); an outer peripheral surface of the inlet column (11) is provided with the water inlet channel (114); the water inlet channel (114) is in communication with the first cavity (112); an intermediate component (12) disposed at the other end of the inlet column (11); a second cavity (123) is disposed in the intermediate component (12); an end of the intermediate component (12) away from the inlet column (11) is provided with the water outlet (124), and the water outlet (124) is communicated with the second cavity (123); the interception net (2) is disposed in the second cavity (123); and A drainage column (13) connected to the intermediate component (12) and covered at the water outlet (124); Wherein, the first cavity (112) and the second cavity (123) together constitute the liquid guiding cavity.
6. The device for analyzing microplastics in water according to claim 5, characterized in that: The intermediate component (12) comprises: Two groups of quick-change clamps (121) are arranged at intervals along the first direction; one of the quick-change clamps (121) is connected to the inlet column (11), and the other quick-change clamp (121) is connected to the outlet column (13); The two groups of connecting valve bodies (122) are relatively fixed along the first direction, and the two opposite ends of the two groups of connecting valve bodies (122) are correspondingly connected to the two groups of quick-change clamps (121); the interception net (2) is rotatably connected inside the connecting valve body (122).
7. The device for analyzing microplastics in water according to claim 6, characterized in that: The inlet column (11) is also provided with an overflow port (115) which is in communication with the liquid guiding cavity.
8. The device for analyzing microplastics in water according to claim 1, characterized in that: A glass cover plate (111) arranged parallel to the intercepting net (2) is provided in the liquid guide device (1), and the glass cover plate (111) divides the liquid guide device (1) into the liquid guide cavity and an installation cavity (113) adjacent to the liquid guide cavity.
9. The device for analyzing microplastics in water according to claim 8, characterized in that: The camera assembly (3) comprises: A mounting seat (31) fixed on the liquid guide device (1); The camera microscope (32) is fixed on the mounting seat (31), and the lens end of the camera microscope (32) passes through the mounting seat (31) and extends into the mounting cavity (113).
10. The device for analyzing microplastics in water according to claim 9, characterized in that: A plurality of groups of fill-in lights (33) are also arranged in the installation cavity (113), and the plurality of groups of fill-in lights (33) are arranged at intervals along the circumference of the installation cavity (113).