Water environment enrichment sampling device

Abstract

The utility model provides a water environment enrichment sampling device which comprises a supporting main body, a filter disc assembly and a sample liquid bottle, and the supporting main body is provided with a working plane; the filter disc assembly is located on the working plane and comprises an upper filter disc and a lower filter disc which are buckled up and down, a containing cavity is formed between the upper filter disc and the lower filter disc, a filter screen plate with a filter membrane is arranged in the containing cavity, and the upper filter disc is configured to form a sealed containing cavity with the lower filter disc under the action of upper and lower pressure; the sample liquid bottle is mounted on the supporting main body and is configured to introduce internal sample liquid into the accommodating cavity under the action of high-pressure gas, and the internal sample liquid flows through the filter screen plate and intercepts microorganisms on the filter membrane. By adopting the scheme, the sample liquid in the sample liquid bottle can flow to the filter disc assembly through high-pressure gas, and the filter disc assembly adopts buckled sealing connection, so that the filter disc can be quickly and conveniently disassembled and assembled, and the enrichment assembly efficiency is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of water filtration, in particular to a water environment enrichment sampling device. Background Art

[0002] At present, various enrichments in the water environment (including bacteria, protozoa, viruses, etc.) are the main cause of waterborne disease outbreaks, which not only endanger people's health and normal daily life, but also bring serious economic losses and even have serious adverse social impacts. So far, more than 1,500 types of water enrichments have been found, including bacteria, viruses, protozoa and fungi, which can infect humans through diet, breathing, skin contact, etc., causing intestinal and respiratory diseases, and even infectious diseases.

[0003] Waterborne enrichment is generally pathogenic and highly contagious. It can cause infection in humans as long as it is in contact or ingested in low amounts. At the same time, its content in the water environment is generally very low, resulting in the inability of current conventional detection methods to accurately detect enrichment. Therefore, it is often necessary to sample and filter enrichment in large volumes of water samples to meet the needs of detection and diagnosis.

[0004] The filtration method is currently the most commonly used enrichment sampling method, which is generally based on pressurized filtration through a polymer membrane. However, due to defects in the sampling structure, the sampling efficiency is low and the sampling work is complicated and cumbersome. At the same time, due to the irregularities in the overall structural layout, the enrichment monitoring process is not accurate, resulting in problems such as missed detections and false alarms. Utility Model Content

[0005] In view of the deficiencies in the prior art, the present invention provides a water environment enrichment sampling device. In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions:

[0006] A water environment enrichment sampling device comprises: a supporting body, a filter disc assembly and a sample liquid bottle, wherein the supporting body has a working plane; the filter disc assembly is located on the working plane, the filter disc assembly comprises an upper filter disc and a lower filter disc which are buckled together and form a receiving cavity therebetween, the receiving cavity has a filter screen plate with a filter membrane, the upper filter disc is configured to form a sealed receiving cavity with the lower filter disc under the action of pressure from above and below; the sample liquid bottle is installed on the supporting body, and the sample liquid bottle is configured to pass the internal sample liquid into the receiving cavity under the action of high-pressure gas, the internal sample liquid flows through the filter screen plate, and the microorganisms are retained in the filter membrane.

[0007] Furthermore, a profile tube is arranged on the top of the supporting body, and the profile tube is arranged horizontally. The profile tube has an air inlet channel and an air inlet on one side. The sample liquid bottle can be detachably installed on the outside of the profile tube. High-pressure gas enters the bottom of the sample liquid bottle through the profile tube, so that the internal sample liquid of the sample liquid bottle flows to the filter screen.

[0008] Furthermore, it also includes a pneumatic regulating valve with a pressure gauge, a first pipeline, a second pipeline and a third pipeline, the first pipeline is connected between the profile pipe and the pneumatic regulating valve, the second pipeline is connected between the pressure gauge and the gas inlet of the sample liquid bottle, and the third pipeline is connected between the liquid outlet of the sample liquid bottle and the liquid inlet of the filter disc assembly.

[0009] Furthermore, the sample liquid bottle comprises a bottle cap and a bottle body, and the bottle cap is detachably and hermetically connected to the bottle body.

[0010] Furthermore, it also includes a pressure seat and a push-pull rod, wherein the pressure seat is installed on the top of the upper filter plate, and the push-pull rod is used to movably apply a force to the pressure seat.

[0011] Furthermore, the push-pull rod is constructed as a connecting rod structure, and the connecting rod structure includes a first pressure rod and a first push rod, and the first pressure rod is configured to push the first push rod to move toward or away from the top surface of the pressure seat during a preset angle rotation process.

[0012] Furthermore, one of the upper filter disc and the lower filter disc has an annular groove structure, and the other of the two has a protruding structure, and the protruding structure is matched with the inner cavity of the annular groove structure, and the two are configured to be snap-fitted and sealed.

[0013] Furthermore, the lower filter disc has a liquid outlet, and the liquid outlet is connected to the filter screen plate.

[0014] Furthermore, the water environment enrichment sampling device also includes a waste liquid collection tank, and the waste liquid collection tank is formed on the working plane of the supporting body.

[0015] Furthermore, the supporting body is constructed as a cabinet, the cabinet has a waste liquid interface and a drainage control valve, the drainage control valve is used to be electrically connected to the waste liquid collection tank, and the waste liquid interface is arranged on one side of the cabinet.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] The internal sample liquid of the sample bottle can flow to the filter disc assembly through high-pressure gas. The filter disc assembly adopts a snap-on sealing connection, which can quickly and conveniently disassemble and install the filter disc, greatly improving the enrichment assembly efficiency. It can adopt a convenient standard sample bottle replacement process to improve sampling efficiency and perform single bottle and single sample control, realize a quick disassembly and quick installation exchange method, which is more scientific and standardized. The upper filter disc is used to realize the sealed inner cavity with the lower filter disc under the bearing pressure, effectively solving the problems of complex disassembly and installation process and poor high-pressure sealing. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0019] Figure 1 This is a schematic diagram of the shaft side structure of an embodiment of the utility model;

[0020] Figure 2 It is a schematic diagram of the cross-sectional structure of the filter disc assembly according to an embodiment of the present utility model.

[0021] In the above drawings: 001-water environment enrichment sampling device; 10-support body; 11-working plane; 111-waste liquid collection tank; 12-profile pipe; 121-air inlet; 13-waste liquid interface; 14-drainage control valve; 20-filter disc assembly; 21-upper filter disc; 22-lower filter disc; 23-filter screen; 30-sample liquid bottle; 31-bottle cap; 32-bottle body; 40-pneumatic regulating valve; 41-pressure gauge; 50-first pipeline; 60-second pipeline; 70-third pipeline; 80-pressure seat; 90-push-pull rod; 91-first pressure rod; 92-first push rod. DETAILED DESCRIPTION

[0022] The technical solution of the present utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0023] In order to make the purpose, features, and advantages of the present disclosure more obvious and easy to understand, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present disclosure.

[0024] Membrane separation sampling is a common, practical and efficient separation and purification technology. It uses the selective permeability of the membrane to screen molecules, separate the desired substances from the mixture and sample them for testing. This technology has the advantages of simple operation, high efficiency and low cost, and has been widely used in the fields of biopharmaceuticals, environmental protection and food industry.

[0025] Membrane separation sampling is to screen and intercept the mixture through the selective permeability of the membrane. The membrane material usually has a certain pore size, porosity and surface chemical properties. These characteristics determine the ability of different molecules to pass through the membrane. For example, nanofiltration membranes can pass larger molecules, ultrafiltration membranes can pass medium molecules, and reverse osmosis membranes can only pass small molecules and water molecules.

[0026] Pressure-driven membrane separation and enrichment is achieved by applying external pressure to allow the solution to enter the membrane pores on the high-pressure side and flow out on the low-pressure side after passing through the membrane pores, thereby achieving screening and sampling of the mixture.

[0027] The filter assembly used for filtration in the existing water environment enrichment sampling device cannot be disassembled and is difficult to clean. In addition, the existing sampling device is also difficult to change samples, the disassembly and assembly process is cumbersome, and the sample liquid bottle cannot be disassembled for rapid replacement and cleaning and disinfection.

[0028] To alleviate this problem, refer to Figure 1 and Figure 2 The embodiment of the present disclosure provides a water environment enrichment sampling device 001, comprising a support body 10, a filter disc assembly 20 and a sample liquid bottle 30, wherein the support body 10 has a working plane 11, which is open-formed on the support body 10 and has an operating space for operation; the filter disc assembly 20 is located on the working plane 11, and exemplarily, the filter disc assembly 20 is detachably mounted on the working plane 11, and the working plane 11 has an installation position for installing the filter disc assembly 20. Specifically, the filter disc assembly 20 includes an upper filter disc 21 and a lower filter disc 22 that are buckled together, wherein a receiving cavity can be formed between the upper filter disc 21 and the lower filter disc 22, and a filter screen plate 23 with a filter membrane is provided in the receiving cavity, and the filter screen plate 23 can set the screen plate specifications according to actual needs. Exemplarily, one of the upper filter disc 21 and the lower filter disc 22 has an annular groove structure, and the other of the two has a protruding structure, and the protruding structure is matched with the inner cavity of the annular groove structure, and the two are configured as a buckled sealed connection. In addition, the lower filter disc 22 has a liquid outlet, and the liquid outlet is connected to the filter screen plate 23. In this way, it is convenient for the waste liquid after collection to flow out.

[0029] Furthermore, the upper filter disc 21 is configured to form a sealed containing cavity with the lower filter disc 22 under the action of pressure from above and below; in addition, it should be pointed out that the sample liquid bottle 30 is installed on the supporting body 10, and the sample liquid bottle 30 is configured to pass the internal sample liquid into the containing cavity under the action of high-pressure gas, and the internal sample liquid flows through the filter mesh plate 23, and the microorganisms are retained in the filter membrane.

[0030] The water environment enrichment sampling device 001 of the disclosed embodiment can use high-pressure gas to make the internal sample liquid of the sample bottle 30 flow to the filter disc assembly 20. The filter disc assembly 20 adopts a snap-on sealing connection, which can quickly and conveniently disassemble and install the filter disc, greatly improving the enrichment assembly efficiency.

[0031] For example, through the improvement of material technology, the filter disc device is improved into a transparent material, which not only meets the requirements of high-pressure sealing, but also allows the state of the entire enrichment process of the sample liquid and the microbial retention situation to be observed with the naked eye, effectively and accurately controlling the filtration time and filtration degree of the sample liquid.

[0032] Exemplarily, the sample liquid bottle 30 includes a bottle cap 31 and a bottle body 32, and the bottle cap 31 is detachably sealed and connected to the bottle body 32. Specifically, the bottle cap 31 and the bottle body 32 are screwed and screwed together, which is easy to operate, so that the sample liquid bottle 30 itself has detachable public replaceability.

[0033] Furthermore, a profile tube 12 is arranged on the top of the support body 10, and the profile tube 12 can be a standard profile adapted to the needs, or a customized profile. Specifically, the profile tube 12 is arranged horizontally, and the profile tube 12 has an air inlet channel and an air inlet 121 on one side; the sample liquid bottle 30 can be detachably installed on the outside of the profile tube 12; in this way, a convenient standard sample bottle replacement process can be adopted to improve sampling efficiency and perform single bottle single sample control, ensuring that the sample liquid is not contaminated during the whole process, and the threaded quick-release quick-install exchange method is more scientific and standardized.

[0034] Specifically, the high-pressure gas is passed into the bottom of the sample liquid bottle 30 via the profile tube 12, so as to make the internal sample liquid of the sample liquid bottle 30 flow to the filter screen 23. Exemplarily, the embodiment of the present disclosure has a tube passed into the bottom of the sample liquid bottle 30, so that the high-pressure gas can be directly passed into the bottom of the sample liquid bottle 30, and the internal sample liquid can be quickly passed into the filter screen 23 in a sealed environment, so as to achieve the accuracy of sampling the internal sample liquid.

[0035] In addition, the water environment enrichment sampling device 001 also includes: a pneumatic regulating valve 40 with a pressure gauge 41, a first pipeline 50, a second pipeline 60 and a third pipeline 70, the first pipeline 50 is connected between the profile pipe 12 and the pneumatic regulating valve 40, the second pipeline 60 is connected between the pressure gauge 41 and the gas inlet of the sample liquid bottle 30, and the third pipeline 70 is connected between the liquid outlet of the sample liquid bottle 30 and the liquid inlet of the filter disc assembly 20. In this way, a sample liquid bottle 30 can perform the sampling process alone. Specifically, in the embodiment of the present disclosure, there are multiple sample liquid bottles 30 arranged in a row, each sample liquid bottle 30 is equipped with a pneumatic regulating valve 40 with a pressure gauge 41, a first pipeline 50, a second pipeline 60 and a third pipeline 70. In this way, a multi-pipeline enrichment method is adopted, and each pipeline can be independently controlled without affecting each other. Each channel can be independently and automatically operated through the newly invented structure, the filter pressure is adjustable and visible, and the sample liquid bottles 30 are interchangeable and universal.

[0036] Specifically, the water environment enrichment sampling device 001 also includes a pressure seat 80 and a push-pull rod 90. The pressure seat 80 is installed on the top of the upper filter plate 21. The push-pull rod 90 is used to movably apply a force to the pressure seat 80. Exemplarily, the push-pull rod 90 is constructed as a connecting rod structure, and the connecting rod structure includes a first pressure rod 91 and a first push rod 92. The first pressure rod 91 is configured to push the first push rod 92 toward or away from the top surface of the pressure seat 80 during a preset angle rotation process. It should be pointed out that the push-pull rod 90 can adopt a standard component structure to achieve the above function, or the push-pull rod 90 can also adopt a non-standard component structure to achieve the above function.

[0037] In addition, the water environment enrichment sampling device 001 also includes a waste liquid collection tank 111, which is formed on the working plane 11 of the supporting body 10. The waste liquid collection tank 111 is added on the original basis to effectively solve the problem of residual waste liquid being brought out and contaminating the entire workbench when the filter disc is opened when the membrane is taken out. At the same time, the filter disc can be cleaned and disinfected in the waste liquid collection tank 111 to avoid disassembly and reinstallation of the filter disc.

[0038] Exemplarily, the support body 10 is constructed as a cabinet, and the cabinet has a waste liquid interface 13 and a drainage control valve 14. The drainage control valve 14 is used to be electrically connected to the waste liquid collection tank 111, and the waste liquid interface 13 is arranged on one side of the cabinet. Moreover, the aforementioned corresponding structures are all installed in the cabinet of the embodiment of the present disclosure. The entire device adopts a semi-enclosed experimental cabin design, and the pipelines that do not need to be adjusted are arranged in a hidden manner. At the same time, each channel gas circuit and discharge water circuit are independently controlled by adjustable valves to ensure that the entire multi-pipeline enrichment unit can be opened independently or simultaneously. At the same time, the optimization of the line control layout makes the entire device structure simpler, more convenient to operate, and more efficient in enrichment.

[0039] In order to further achieve the corresponding effects of the water environment enrichment sampling device 001 of the embodiment of the present disclosure, the specific scheme is as follows:

[0040] Among them, the water-permeable and air-permeable holes of the filter net are evenly distributed with φ2mmx6mm round holes, ensuring that it can meet the monitoring of filter membranes of different specifications, thicknesses and densities. The filter net is filled with a round hole structure to ensure that the support for the filter membrane is more stable and uniform, ensuring that the membrane has the function of water permeability and is not penetrated by high pressure. The round hole structure is easier to process and shape than the wire mesh structure. The evenly distributed round hole filling can effectively reduce the risk of the filter membrane being punctured by high water pressure, as well as deformation and wrinkling caused by high pressure.

[0041] Furthermore, the entire filtration system adopts a positive pressure delivery method, that is, a positive pressure air intake push-type filtration method, and an external air inlet 121 is designed. At the same time, the air circuit directly uses the cabinet aluminum profile frame as the air intake pipe, which simplifies the layout of the air intake pipe. Four filtering sampling channels are branched out through the main channel layout. Each channel is controlled and adjusted by a pneumatic control valve with a pressure gauge 41, and then connected to the sample liquid bottle 30 of each channel.

[0042] Specifically, the sample liquid bottle 30 is improved into a detachable and interchangeable standard part, and the bottle body and the upper cover adopt a threaded hanging structure to meet the needs of manual and quick replacement of the bottle body. The bottle body is made of transparent plastic, and the filtration of the sample liquid can be observed with the naked eye. The bottle cap 31 is designed with an air inlet and a water guide hole, and the water guide hole extends to the bottom of the bottle body through a conduit. At the same time, one side of the bottle cap 31 is designed with a connecting hanging plate and a connecting hanging hole, which are fixed to the frame support beam by screws.

[0043] It should be pointed out that the microbial virus filtering device adopts a snap-fit ​​structure of upper and lower filter discs 22. The upper filter disc 21 is designed with a boss structure, and the lower filter disc 22 is designed with a groove structure. The snap-fit ​​guiding positioning is performed through the concave-convex structure, and a silicone sealing ring is arranged in the groove with snap-fit ​​guiding positioning for sealing.

[0044] Furthermore, the pressure seat 80 adopts a sheet metal four-corner U-shaped structure with equal center distances at the four corners, which satisfies the requirement that the pressing force on the upper filter disc 21 is centrally distributed to the four supporting feet, ensuring that the entire upper filter disc 21 is under balanced pressure, while the air intake pipe can be smoothly connected without interference.

[0045] The upper filter disc 21 and the lower filter disc 22 are pressed together by a push-pull quick clamp (that is, a push-pull rod 90). The push-pull rod 90 includes a first pressure rod 91 and a first push rod 92. At least part of the structure of one pressure rod is fixedly connected to the upper supporting beam of the supporting body 10 to ensure that multiple push-pull rods 90 are at the same horizontal height, and the pressure rod center of the first push rod 92 is aligned with the center of the upper filter disc 21. The quick clamp is semi-hiddenly installed, leaving only the hand push rod of the working part. The simple layout is more conducive to the automation process of the experiment without interference.

[0046] In addition, the four channels adopt independent air intake valve control and independent valve waste discharge control, and a waste liquid collection interface is reserved, which can be connected to waste liquid collectors of different specifications. The unit air intake valve is installed on the top surface of the air intake beam for easy operation. The air intake valve adopts an adjustable valve with pressure display. The air intake valve is located at the front end of the sample liquid bottle 30, and air pressure is injected into the sample liquid bottle 30 by opening the valve.

[0047] Furthermore, each filter sampling channel is equipped with an independent air intake regulating valve and waste liquid discharge control valve, and a pressure display gauge is set in the air intake channel, which can effectively read and set the internal filter pressure. At the same time, each channel is equipped with an independent air intake system and drainage system, which can be independently controlled to start and stop. That is, the four channels can be controlled at the same time or operate independently without affecting each other. The tail waste liquid and exhaust gas are collected and a high-pressure sealed control valve is set at the drainage end of each channel to ensure that each channel will not be contaminated by each other and affect the results.

[0048] Moreover, the entire cabinet is made of high-strength and corrosion-resistant 316L material, and the surface is treated with a mirror polishing process. A waste liquid collection tank 111 is provided at the rear side of the sampling and filtering structure to collect the waste liquid from cleaning the filter disc and the pipe and connect it to the drain pipe through a pipe for waste collection. At the same time, the residual liquid brought out during the opening of the filter disc can be collected. All internal pipes are hidden at the bottom of the counter, and only the control valve is reserved for manual control and adjustment.

[0049] In summary, the push-pull rod 90-type pressing structure of the disclosed embodiment effectively solves the problems of complex disassembly and installation process and poor high-pressure sealing. At the same time, the push-pull rod 90-type pressing sealing method is more evenly stressed than the traditional screw structure or clamp structure, and greatly improves the installation efficiency and portability of disassembly and assembly. The standard sample liquid bottle 30 is used to extract and replace the test liquid, which is more convenient than the previous fixed sample liquid tube structure to exchange the sample liquid, and the sample liquid bottle 30 can be independently disassembled and cleaned and disinfected through a threaded connection, ensuring the reuse and mutual non-contamination of the sample liquid bottle 30. The sample liquid bottle 30 cover completes the transportation of the sample liquid by designing the air inlet and water outlet. The waste liquid collection tank 111 is added to ensure that the cleaning and disinfection work can be carried out in the equipment and the waste liquid can be effectively collected and processed. Compared with traditional and existing equipment, the cleaning waste liquid and residual liquid cannot be effectively collected and controlled, which is very easy to contaminate the work surface and have a certain mixing effect on the measurement results. Therefore, the new structure is designed with a waste liquid collection tank 111 to ensure the integrity of the entire device and the upgrade of functionality. At the same time, the collected waste liquid can be effectively discharged into the external waste liquid collector through the bottom pipe. The material process is improved, and the sampling and enrichment filter disc structure is made of transparent plastic resistant to high pressure corrosion, which meets the visual and controllable requirements of the entire enrichment sampling process, reduces the emergencies and errors in the sampling process, and can quickly identify whether the microbial retention of the filter membrane is normal and completed. A multi-channel enrichment scheme is adopted, and each channel realizes independent control and automatic operation functions, and effectively solves the problem of multi-channel mixed sample contamination. At the same time, standard air intake external interfaces and waste liquid collection ports are provided, so the entire device is more conducive to the intelligent deployment of the laboratory, and the entire functional system is highly integrated and visualized, which is conducive to the simplified operation of the experiment and the rapid storage of data. Through the optimization and improvement of the air intake pipe and the drainage pipe, the hidden pipe structure is adopted, that is, part of the pipe is integrated into the support frame, so that the structure of the entire device is more concise and the operation is more standardized, which greatly reduces unnecessary experimental errors and hidden dangers during operation. At the same time, the entire cabinet is processed with 316L mirror stainless steel to reduce the residue of waste liquid pollutants.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A water environment enrichment sampling device, characterized in that: include: A support body, the support body having a working plane; A filter disc assembly, the filter disc assembly is located on the working plane, the filter disc assembly comprises an upper filter disc and a lower filter disc which are buckled together and form a receiving cavity therebetween, the receiving cavity has a filter screen with a filter membrane, the upper filter disc is configured to form a sealed receiving cavity with the lower filter disc under the action of pressure from above and below; A sample liquid bottle is installed on the supporting body, and the sample liquid bottle is configured to pass the internal sample liquid into the accommodating cavity under the action of high-pressure gas, and the internal sample liquid flows through the filter screen plate and retains the microorganisms in the filter membrane.

2. A water environment enrichment sampling device according to claim 1, characterized in that: A profile tube is arranged on the top of the support body, and the profile tube is arranged horizontally. The profile tube has an air inlet channel and an air inlet on one side. The sample liquid bottle can be detachably installed on the outside of the profile tube. High-pressure gas passes into the bottom of the sample liquid bottle through the profile tube, so that the internal sample liquid of the sample liquid bottle flows to the filter screen.

3. A water environment enrichment sampling device according to claim 2, characterized in that: It also includes a pneumatic regulating valve with a pressure gauge, a first pipeline, a second pipeline and a third pipeline. The first pipeline is connected between the profile pipe and the pneumatic regulating valve, the second pipeline is connected between the pressure gauge and the gas inlet of the sample liquid bottle, and the third pipeline is connected between the liquid outlet of the sample liquid bottle and the liquid inlet of the filter disc assembly.

4. A water environment enrichment sampling device according to claim 1, characterized in that: The sample liquid bottle comprises a bottle cap and a bottle body, and the bottle cap is detachably and hermetically connected to the bottle body.

5. The water environment enrichment sampling device according to claim 1, characterized in that: It also includes a pressure seat and a push-pull rod, wherein the pressure seat is installed on the top of the upper filter plate, and the push-pull rod is used to movably apply a force to the pressure seat.

6. A water environment enrichment sampling device according to claim 5, characterized in that: The push-pull rod is configured as a connecting rod structure, and the connecting rod structure includes a first pressure rod and a first push rod, and the first pressure rod is configured to push the first push rod to move toward or away from the top surface of the pressure seat during a preset angle rotation process.

7. The water environment enrichment sampling device according to claim 1, characterized in that: One of the upper filter disc and the lower filter disc has an annular groove structure, and the other of the two has a protruding structure. The protruding structure is matched with the inner cavity of the annular groove structure, and the two are configured to be snap-fitted and sealed.

8. A water environment enrichment sampling device according to claim 7, characterized in that: The lower filter disc has a liquid outlet, and the liquid outlet is communicated with the filter screen plate.

9. A water environment enrichment sampling device according to claim 8, characterized in that: It also includes a waste liquid collection tank, which is formed on the working plane of the supporting body.

10. A water environment enrichment sampling device according to claim 9, characterized in that: The supporting body is constructed as a cabinet, and the cabinet has a waste liquid interface and a drainage control valve. The drainage control valve is used for electrically connecting with the waste liquid collection tank, and the waste liquid interface is arranged on one side of the cabinet.

Images