Water quality sampling device

Abstract

The application discloses a water quality sampling device, when the water quality parameter in the sample does not need to add a fixing agent to preserve, the multi-station turntable in the sample storage assembly works to make the sample storage container move through the sample storage station and stay for a set sample storage time, within the set sample storage time, the sampling assembly automatically extracts the sample into the sample storage container of the sample storage assembly; when the water quality parameter in the sample needs to add a fixing agent to preserve, the multi-station turntable works to make the sample storage container move through the sample storage station and the fixing agent adding station and stay for a set sample storage time and a set adding time respectively, within the set sample storage time, the sampling assembly automatically extracts the sample into the sample storage container, within the set adding time, the fixing agent adding mechanism automatically adds the fixing agent into the sample storage container; compared with the prior art, the whole process does not need manual intervention, the automation degree is high, the manpower cost is saved, the interference possibly caused by manual operation is effectively eliminated, the detection result is high in reliability, and the water quality sampling device is suitable for wide popularization and application.

Description

Technical Field

[0001] This invention relates to the field of water quality testing technology, and in particular, to a water quality sampling device. Background Technology

[0002] In order to understand and assess water quality and provide a scientific basis for water resource management, water pollution prevention and control, and water environment quality management, water quality testing is required to monitor the types of pollutants in the water, the concentration of various pollutants, and their changing trends. The scope of water quality testing is extensive, including unpolluted and polluted natural water (rivers, lakes, seas, and groundwater) as well as various types of industrial wastewater. The main process of water quality testing is: on-site sampling and preservation, sample transportation, laboratory analysis, and data processing. On-site sampling and preservation is mainly achieved through water quality sampling devices.

[0003] For example, Chinese utility model patent CN217542528U discloses a lake water quality sampling device, including an installation cylinder, a flexible hose, a cabinet, an extraction pump, a connecting block, and a support plate. The extraction pump is installed inside one side of the cabinet, with a delivery pipe and a flexible hose at one end. A support plate is installed on one side of the upper part of the cabinet, and an installation cylinder is positioned between the support plates. Installation cylinders with progressively decreasing radii are slidably installed inside the installation cylinder. An installation groove is formed on the inner wall of the installation cylinder, and a connecting block is installed inside the groove. A spring is attached to one end of the connecting block. This invention provides convenient sampling of lake water far from the shore, solving the problem that existing sampling devices lack this capability. By extending the flexible hose from the installation cylinder, effective sampling of distant lake water can be achieved. The flexible hose is inserted into the water from the air, maintaining the calmness of the water at the sampling point, thus making lake water sampling more diverse.

[0004] However, when collecting water samples for certain water quality parameters (such as heavy metal parameters), it is necessary to add a fixative in a timely manner after sampling to ensure that the concentration and form of the analyte in the water sample do not change during the period from sampling to laboratory analysis, so that the test results can truly reflect the water quality status. However, in the above scheme, the addition of the fixative mainly relies on manual labor, with low automation and the possibility of human interference affecting the test results. Summary of the Invention

[0005] This invention provides a water quality sampling device to solve the technical problems of existing water quality sampling devices, such as the need for manual intervention in adding fixatives, low automation, and the possibility of human interference.

[0006] According to one aspect of the present invention, a water quality sampling device is provided, comprising a sampling assembly and a sample storage assembly. The sampling assembly is used to extract samples into the sample storage assembly. The sample storage assembly includes a multi-station turntable, a sample storage container arranged on the multi-station turntable, and a fixative addition mechanism. Above the multi-station turntable, sample storage stations corresponding to the sampling assembly and fixative addition stations corresponding to the fixative addition mechanism are arranged circumferentially. The multi-station turntable is used to move the sample storage container through the sample storage stations and the fixative addition stations. The fixative addition mechanism is used to add fixative into the sample storage container.

[0007] As a further improvement to the above technical solution: Furthermore, the fixative adding mechanism includes a turntable assembly, a fixative storage container arranged on the turntable assembly, a fixative delivery pipe connected to the fixative storage container, and a fixative delivery assembly connected to the fixative delivery pipe. There are N fixative storage containers, which are arranged at intervals on the turntable assembly. The fixative delivery assembly and the fixative delivery pipe are arranged in a one-to-one correspondence, and N is a positive integer.

[0008] Furthermore, the fixative delivery assembly includes a compression structure connected to the fixative delivery pipeline, a pressure-reducing structure for pressing the compression structure, and a top-pressure motor whose output end is connected to the pressure-reducing structure. The compression structure and the fixative delivery pipeline are arranged in a one-to-one correspondence.

[0009] Furthermore, the fixative delivery pipeline includes a dispensing pipeline connected to the fixative storage container and the compression structure respectively, a dispensing check valve installed on the dispensing pipeline, a dispensing pipeline connected to the dispensing pipeline and the compression structure respectively, and a dispensing check valve installed on the dispensing pipeline.

[0010] Furthermore, the sampling assembly also includes a switch cover assembly, a multi-station turntable with switch cover stations corresponding to the switch cover assembly, and a fixed base on the switch cover station for circumferential positioning of the sample container.

[0011] Furthermore, the water quality sampling device also includes an overflow sampling mechanism, which includes a drain hole opened on a fixed base and a collection funnel arranged below the drain hole.

[0012] Furthermore, the sample storage container includes a container body and a container lid for sealing the container body. The container lid includes a lid body, a sample channel extending downward from the top of the lid body for communicating with the inner cavity of the container body, and a channel opening and closing control mechanism disposed within the lid body for controlling the opening or closing of the sample channel.

[0013] Furthermore, the sampling assembly includes a sampling pump, a sampling pipeline, and a filtration assembly. The sampling pipeline is connected to the sample storage assembly, the sampling pump, and the filtration assembly, respectively, and the output end is located at the sample storage station.

[0014] Furthermore, the water sampling device also includes a sample storage assembly for storing samples for sedimentation.

[0015] Furthermore, the sample storage assembly includes a sample storage container, a multi-parameter detection component, and a quality control component. The sample storage container is provided with a quality control station and a detection station at intervals. The quality control component is arranged on the quality control station, and the detection station has an opening for the detection end of the multi-parameter detection component to extend into.

[0016] The present invention has the following beneficial effects: The water quality sampling device of the present invention, when the water quality parameters in the sample do not require the addition of a fixative for preservation, operates a multi-station turntable in the sample storage assembly, causing the sample storage container to move past the sample storage station and remain there for a set storage time. During the set storage time, the sampling assembly automatically extracts the sample into the sample storage container of the sample storage assembly. When the water quality parameters in the sample require the addition of a fixative for preservation, the multi-station turntable operates, causing the sample storage container to move past both the sample storage station and the fixative addition station, remaining there for a set storage time and a set addition time, respectively. During the set storage time, the sampling assembly automatically extracts the sample into the sample storage container, and during the set addition time, the fixative addition mechanism automatically adds the fixative into the sample storage container. This solution, through the coordinated operation of the sampling assembly and the sample storage assembly, achieves automatic sample storage and retrieval and automatic fixative addition. Compared with existing technologies, the entire process requires no manual intervention, has a high degree of automation, saves labor costs, effectively eliminates interference that may be caused by manual operation, and is conducive to improving the reliability of test results during subsequent testing. It is highly practical and suitable for widespread promotion and application.

[0017] In addition to the objectives, features, and advantages described above, the present invention has other objectives, features, and advantages. The invention will now be described in further detail with reference to the figures. Attached Figure Description

[0018] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings: Figure 1 This is a schematic diagram of the structure of a water quality sampling device according to a preferred embodiment of the present invention; Figure 2 This is a schematic diagram of the fixative addition mechanism in the water quality sampling device according to a preferred embodiment of the present invention; Figure 3 This is a schematic diagram of the internal structure of the fixative addition mechanism in the water quality sampling device according to a preferred embodiment of the present invention; Figure 4 This is a schematic diagram of the internal structure of the fixative addition mechanism in the water quality sampling device according to a preferred embodiment of the present invention; Figure 5 This is a schematic diagram of the switch cover assembly in the working state of the water quality sampling device according to a preferred embodiment of the present invention; Figure 6 This is an exploded view of the overflow sampling mechanism and the sample storage container in the water quality sampling device of a preferred embodiment of the present invention; Figure 7 This is a schematic diagram of the sampling assembly in the water quality sampling device according to a preferred embodiment of the present invention; Figure 8 This is a schematic diagram of the container lid in a preferred embodiment of the water quality sampling device of the present invention.

[0019] Explanation of reference numerals in the attached figures: 100. Sample storage assembly; 110. Sample storage container; 120. Multi-parameter sensor; 130. Detection drive unit; 140. Standard solution container; 150. Cleaning unit; 200. Sampling assembly; 210. Sampling pump; 220. Sampling pipeline; 230. Vacuum filtration assembly; 300. Sample storage assembly; 310. Multi-station turntable; 311. Fixed base; 320. Sample storage container; 321. Cover body; 322. Sample channel 323. Channel opening and closing control mechanism; 330. Switch cover assembly; 331. Robotic arm; 332. Gripper; 340. Fixative adding mechanism; 341. Turntable II; 342. Drive component II; 343. Fixative storage container; 344. Dispensing pipe; 345. Dispensing check valve; 346. Discharge pipe; 347. Discharge check valve; 348. Compression structure; 349. Pressure-reducing structure; 410. Collection funnel. Detailed Implementation

[0020] The following description provides specific application scenarios and requirements for this specification, intended to enable those skilled in the art to make and use the contents of this specification. Various partial modifications to the disclosed embodiments will be apparent to those skilled in the art, and the general principles defined herein can be applied to other embodiments and applications without departing from the spirit and scope of this specification.

[0021] The terminology used herein is for the purpose of describing particular exemplary embodiments only and is not restrictive. For example, unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “the” as used herein may also include the plural forms. When used in this specification, the terms “comprising,” “including,” and / or “containing” mean that the associated integers, steps, operations, elements, and / or components are present, but do not preclude the presence of one or more other features, integers, steps, operations, elements, components, and / or groups, or that other features, integers, steps, operations, elements, components, and / or groups may be added to the system / method.

[0022] Considering the following description, these and other features of this specification, as well as the operation and function of the related components of the structure, and the economy of assembly and manufacture of the parts, can be significantly improved. All of these form part of this specification with reference to the accompanying drawings. However, it should be clearly understood that the drawings are for illustrative and descriptive purposes only and are not intended to limit the scope of this specification. It should also be understood that the drawings are not drawn to scale.

[0023] like Figure 1 As shown, the water quality sampling device of this embodiment includes a sampling assembly 200 and a sample storage assembly 300. The sampling assembly 200 is used to extract samples into the sample storage assembly 300. The sample storage assembly 300 includes a multi-station turntable 310, a sample storage container 320 arranged on the multi-station turntable 310, and a fixative addition mechanism 340. The multi-station turntable 310 is circumferentially spaced above the sample storage station corresponding to the sampling assembly 200 and a fixative addition station corresponding to the fixative addition mechanism 340. The multi-station turntable 310 is used to move the sample storage container 320 through the cover opening station and the fixative addition station. The fixative addition mechanism 340 is used to add fixative into the sample storage container 320.

[0024] like Figure 1 As shown, specifically, in the water quality sampling device of the present invention, when the water quality parameters in the sample do not require the addition of a fixative for preservation, the multi-station turntable 310 in the sample storage assembly 300 operates, causing the sample storage container 320 to move past the sample storage station and remain there for a set storage time. During the set storage time, the sampling assembly 200 automatically extracts the sample into the sample storage container 320 of the sample storage assembly 300. When the water quality parameters in the sample require the addition of a fixative for preservation, the multi-station turntable 310 operates, causing the sample storage container 320 to move past the sample storage station and the fixative addition station, and remain there for a set storage time and a set addition time, respectively. Within a set sample storage time, the sampling assembly 200 automatically extracts the sample into the sample storage container 320. Within a set addition time, the fixative addition mechanism 340 automatically adds the fixative into the sample storage container 320. This solution achieves automatic sample storage and retrieval and automatic fixative addition through the coordinated operation of the sampling assembly 200 and the sample storage assembly 300. Compared with existing technologies, the entire process requires no manual intervention, has a high degree of automation, saves labor costs, effectively eliminates interference that may be caused by manual operation, and helps improve the reliability of test results in subsequent testing. It is highly practical and suitable for widespread promotion and application.

[0025] Optionally, the water sampling device also includes a control assembly for controlling the sampling assembly 200 and the sample storage assembly 300 to work together.

[0026] Optionally, the control assembly includes a PLC controller.

[0027] It should be understood that the sampling assembly 200 can extract samples from source water or from other storage structures.

[0028] Optionally, multiple sample storage containers 320 are provided, and the multiple sample storage containers 320 are arranged at intervals along the circumference of the multi-station turntable 310 so that multiple samples can be stored sequentially.

[0029] like Figure 2-3 As shown, in this embodiment, the fixative adding mechanism 340 includes a turntable assembly, a fixative storage container 343 arranged on the turntable assembly, a fixative delivery pipe communicating with the fixative storage container 343, and a fixative delivery assembly connected to the fixative delivery pipe. There are N fixative storage containers 343, spaced apart on the turntable assembly. The fixative delivery assembly and the fixative delivery pipe are arranged in a one-to-one correspondence, where N is a positive integer. Specifically, during actual sampling, the corresponding number of fixative storage containers 343 can be selected according to the type of fixative as needed for testing, so that each type of fixative is stored through its corresponding fixative storage container 343 and added to the sample container 320 through its corresponding fixative delivery pipe. The fixative delivery channels are relatively independent of each other, avoiding the possibility of cross-contamination between fixatives. The turntable assembly moves the fixative delivery pipe corresponding to the fixative to be added to the fixative adding station, where the fixative delivery assembly adds the fixative to the sample container 320.

[0030] like Figure 3 As shown, optionally, the turntable assembly includes a second turntable 341 and a second drive unit 342. The second drive unit 342 drives the second turntable 341 to rotate, so as to move the sample storage container 320 to the opening and closing cover station, the sample storage station, the fixative addition station and the opening and closing cover station in sequence.

[0031] Optionally, the second driving component 342 includes a second rotary motor and a second driving gear. The second turntable 341 is a gear disk. The output shaft of the second rotary motor and the second driving gear are fixedly connected. The second driving gear and the second turntable 341 mesh with each other. The second rotary motor works to drive the second turntable 341 to rotate through the second driving gear.

[0032] like Figure 2-3As shown, in this embodiment, the fixative delivery assembly includes a compression structure 348 connected to the fixative delivery pipeline, a pressure-reducing structure 349 for pressing against the compression structure 348, and a top-pressure motor with its output end connected to the pressure-reducing structure 349. The compression structure 348 and the fixative delivery pipeline are arranged in a one-to-one correspondence. Specifically, the top-pressure motor drives the pressure-reducing structure 349 to reciprocate against the compression structure 348, thereby generating compressed gas to guide the fixative through the fixative delivery pipeline into the sample storage container 320, thus realizing the addition of the fixative. Furthermore, through the cooperation of the turntable assembly and the top-pressure motor, the addition of N types of fixatives can be achieved with one top-pressure motor and one pressure-reducing structure 349. Compared with the existing peristaltic pump or plunger pump structure, this greatly simplifies the circuit structure and reduces costs.

[0033] Optionally, the compression structure 348 can be a piston or an air bladder.

[0034] Optionally, the pressure structure 349 can be a pressure block or a pressure bar.

[0035] like Figure 3-4 As shown, in this embodiment, the fixative delivery pipeline includes a dispensing pipeline 344 connected to the fixative storage container 343 and the compression structure 348, a dispensing check valve 345 disposed on the dispensing pipeline 344, a dispensing pipeline 346 connected to the dispensing pipeline 344 and the compression structure 348, and a dispensing check valve 347 disposed on the dispensing pipeline 346. Specifically, after the compression structure 348 is repeatedly compressed to generate compressed gas, the fixative is first guided into the dispensing pipeline 344 by the compressed gas, and then added into the sample storage container 320 through the dispensing pipeline 346. During the fixative addition process, the dispensing check valve 345 and the dispensing check valve 347 prevent the fixative from flowing back, ensuring the smooth addition of the fixative.

[0036] Optionally, in another embodiment, the fixative addition mechanism 340 includes a fixative chamber for storing fixative, a fixative delivery pipeline connected to the fixative chamber for delivering fixative, and an addition pump for pumping fixative. Multiple fixative chambers are provided, and the fixative chambers, fixative delivery pipelines, and addition pumps are arranged in a one-to-one correspondence. When fixative needs to be added, the addition pump operates to pump the fixative in the fixative chamber to the water sample in the sample storage container 320 via the fixative delivery pipeline, thus achieving automatic fixative addition. Furthermore, since multiple fixative chambers are provided, and the fixative chambers, fixative delivery pipelines, and addition pumps are arranged in a one-to-one correspondence, different indicators correspond to different types of fixative, thereby achieving one-to-one fixative addition and avoiding the risk of cross-contamination of fixatives.

[0037] like Figure 5As shown, in this embodiment, the water quality sampling device also includes a cover switch assembly 330. A multi-station turntable 310 is provided with cover switch stations corresponding to the cover switch assembly 330, and a fixed base 311 is provided at each cover switch station for circumferential positioning of the sample container 320. Specifically, to avoid the sample container 320 being left open for extended periods, the container cover is closed when no samples are being stored or fixed agents are being added. When samples are being stored or retrieved, the multi-station turntable 310 operates, causing the sample container 320 to move twice past the cover switch station, stopping for a set opening time and a set closing time respectively. During the set opening time, the cover switch assembly 330 opens the container cover to allow for sample storage and fixative addition. During the set closing time, the cover switch assembly 330 closes the container cover to prevent the sample container 320 from being left open.

[0038] Optionally, the cover opening and closing assembly 330 includes a robotic arm 331 for rotation and lifting, and a gripper 332 disposed on the free end of the robotic arm 331 for holding the lid of the sample container 320. After the sample container 320 moves to the cover opening and closing station, the robotic arm 331 lowers so that the gripper 332 can grasp the lid of the sample container 320, or the gripper 332 can place the lid of the sample container 320 on the sample container 320 and then rotate and rise to open the lid, or rotate and lower to close the lid. During the operation, the sample container 320 is circumferentially positioned by the fixed base 311 to prevent the sample container 320 from rotating synchronously, thus ensuring smooth cover opening and closing operation.

[0039] Alternatively, in another embodiment, the switch cover assembly 330 may be disposed on the side of the multi-station turntable 310; compared to the switch cover assembly 330 being disposed on the multi-station turntable 310, the robotic arm 331 in this embodiment needs to complete the movement operation in three-dimensional space, and its control process is relatively complex.

[0040] Optionally, the multi-station turntable 310 includes a turntable and a drive unit. The drive unit drives the turntable to rotate so as to move the sample storage container 320 to the sample storage work, or the sample storage station and the fixative addition station in sequence. Optionally, when the cover opening and closing assembly 330 is mounted on the multi-station turntable 310 and the sample container 320 needs to have its cover opened and closed, the turntable is driven to rotate by a drive unit so that the sample container 320 moves sequentially through the cover opening and closing station, the sample storage station, the fixative addition station, and the cover opening and closing station.

[0041] Optionally, the drive unit 1 includes a rotary motor 1 and a drive gear 1, the turntable 1 is a gear disk, the output shaft of the rotary motor 1 is fixedly connected to the drive gear 1, the drive gear 1 and the turntable 1 mesh, and the rotary motor 1 works to drive the turntable 1 to rotate through the drive gear 1.

[0042] like Figure 6 As shown, in this embodiment, the water quality sampling device also includes an overflow sampling mechanism, which includes a drain hole on the fixed base 311 and a collection funnel 410 disposed below the drain hole. Specifically, according to the requirements of the sampling specifications, certain parameters in the sample to be tested need to be sampled by overflow. In this embodiment, the overflow sampling mechanism allows the sample to overflow and flow down the outer wall of the sample storage container 320 into the fixed base 311, and then be discharged through the drain hole into the collection funnel 410. The overflow sample is collected by the collection funnel 410 and then discharged centrally, thereby avoiding the sample from affecting the normal operation of the water quality sampling device.

[0043] like Figure 7 As shown, in this embodiment, the sampling assembly 200 includes a sampling pump 210, a sampling pipeline 220, and a filtration assembly 230. The sampling pipeline 220 is connected to the sample storage assembly 100, the sampling pump 210, and the filtration assembly 230, and its output end is located at the sample storage station. Specifically, according to the requirements of the sampling specifications, certain parameters (such as heavy metal indicators) in the sample to be tested need to be sampled by filtration. In this embodiment, the sample is extracted into the filtration assembly 230 through the sampling pump 210 and the sampling pipeline 220, the filtration of the sample is achieved by the filtration assembly 230, and then transported to the sample storage container 320 through the sampling pipeline 220 to achieve filtration sampling.

[0044] Optionally, the filtration assembly 230 includes a vacuum pump and a filter to extract a sample by operating the vacuum pump and then filter the sample by the filter.

[0045] Optionally, the filter is a 0.45µm filter membrane.

[0046] Alternatively, in another embodiment, the sampling assembly 200 includes a sampling pump 210 and a sampling conduit 220, wherein the sampling pump 210 operates to extract the sample into the sample storage container 320.

[0047] like Figure 1 As shown, in this embodiment, the water quality sampling device also includes a sample storage assembly 100 for storing samples for sedimentation; the sample is first stored in the sample storage assembly 100 for sedimentation, and then the sample is extracted from the sample storage assembly 100 by the sampling assembly 200 to meet the requirements of certain sampling standards.

[0048] like Figure 1As shown, in this embodiment, the sample storage assembly 100 includes a sample storage container 110, a multi-parameter detection component, and a quality control component. The sample storage container 110 has a quality control station and a detection station spaced apart. The quality control component is located at the quality control station, and the detection station has an opening for the detection end of the multi-parameter detection component to extend into it. Specifically, when detecting parameters such as dissolved oxygen, pH, water temperature, and conductivity in the sample in the sample storage container 110, the detection end of the multi-parameter detection component extends into the sample storage container 110 through the opening of the detection station for on-site measurement. The quality control component is used to control the detection capability of the multi-parameter detection component, ensuring the accuracy and reliability of the data measured by the multi-parameter detection component under complex sampling conditions.

[0049] like Figure 1 As shown, in this embodiment, the quality control component includes a standard solution container 140 disposed at the quality control station and a cleaning component 150 disposed above the standard solution container 140. Specifically, the detection end of the multi-parameter detection component is cleaned by the cleaning component 150 and then inserted into the standard solution container 140 to avoid contaminating the standard solution. The standard solution in the standard solution container 140 is used to verify and / or calibrate the multi-parameter detection component.

[0050] Optionally, the cleaning component 150 is a sponge with through holes.

[0051] In this embodiment, the multi-parameter detection component includes a multi-parameter sensor 120 and a detection drive 130 connected to the multi-parameter sensor 120 for driving the multi-parameter sensor 120 to move up, down, and translate. Specifically, the detection drive 130 drives the multi-parameter sensor 120 to move up, down, and translate, thereby realizing the transfer between the detection station and the quality control station.

[0052] Optionally, the multi-parameter sensing element 120 is a multi-parameter sensor or a multi-parameter sensing probe.

[0053] Alternatively, in another embodiment, the multi-parameter sensing component is a multi-parameter detection device.

[0054] Optionally, the water quality sampling device also includes a control assembly, which is electrically connected to the sample storage assembly 100, the sampling assembly 200 and the sample storage assembly 300 respectively, for controlling the coordinated operation of the sample storage assembly 100, the sampling assembly 200 and the sample storage assembly 300.

[0055] like Figure 7 As shown, in a certain embodiment, the specific working process of the sampling assembly 200 is as follows: The sampling pump 210 operates to extract the sample from the sample storage container 110. If filtration is not required, the sample is injected into the sample storage station through the sampling pipe 220.

[0056] When collecting samples for heavy metal indicators, the vacuum pump operates, and the extracted sample is filtered and stored through the sampling pipe 220. When the filtered sample meets the requirements, the vacuum pump stops operating, and the sampling pump 210 transports the filtered sample through the sampling pipe 220 to the sample storage station for injection.

[0057] like Figure 1-5 As shown, in a certain embodiment, the specific working process of the sample storage assembly 300 is as follows: The sample container 320 is placed on the turntable, and the drive unit drives the turntable to rotate, moving the sample container 320 to the opening / closing position. The robotic arm 331 and gripper 332 then work together to open the lid. After opening, the drive unit drives the turntable to rotate, moving the sample container 320 to the sample storage position. The sampling assembly 200 extracts the sample from the sample storage assembly 100 and injects it into the sample container 320. After injection, the drive unit drives the turntable to rotate, moving the sample container 320 to the fixative addition position. At the workstation, drive component 2 342 drives turntable 2 341 to rotate. The fixative delivery pipeline corresponding to the fixative is located after the fixative addition workstation. The top pressure motor works to reciprocate the pressure structure 349 against the compression structure 348 to generate compressed gas to guide the fixative along the fixative delivery pipeline into the sample storage container 320. After the fixative is added, drive component 1 drives turntable 1 to rotate so that the sample storage container 320 moves to the cover opening and closing workstation. The cover closing operation is performed by the cooperation of robotic arm 331 and gripper 332.

[0058] like Figure 8As shown, optionally, in another embodiment, the sample storage container 320 includes a container body and a container lid for sealing the container body. The container lid includes a lid body 321, a sample channel 322 extending downward from the top of the lid body 321 to communicate with the inner cavity of the container body, and a channel opening / closing control mechanism 323 disposed within the lid body 321 for controlling the opening or closing of the sample channel 322. The lid body 321 is connected to the container body to seal the container body of the sample storage container 320. The sample channel 322 is formed on the lid body 321 to communicate with the inner cavity of the container body, and the sample channel 322 is ensured to extend downward from the top of the lid body 321. The channel opening / closing control mechanism 323 controls the opening or closing of the sample channel 322. During sampling and storage, the channel opening / closing control mechanism 323 controls the sample channel 322 to open only for a short period of time when the sample and fixative are added, and controls the sample channel 322 to close at other times, so as to minimize external influences and eliminate the need for a closed-loop tube. Sampling is performed via a closed-loop pipeline to avoid cross-contamination caused by residual liquid. Liquid in the sample channel 322 will naturally flow into the inner cavity of the container body under gravity, minimizing sample residue. In low-temperature environments, the sample channel 322 will not become blocked due to icing of residual sample, ensuring normal sampling operations and demonstrating strong environmental adaptability. During sampling and testing, after the sample channel 322 is opened by the channel opening and closing control mechanism 323, the sampling needle can directly penetrate the sample channel 322 and enter the inner cavity of the container body to collect samples without the need for opening and closing the cover, simplifying the testing process. Furthermore, the sample channel 322 can be opened and closed at any time throughout the testing process, allowing it to be opened only when necessary and closed at other times. This significantly shortens the open time of the sample container 320, reducing or even eliminating the risk of contamination from external impurities during testing. In addition, the channel opening and closing control mechanism 323 has a compact and easy-to-implement structure, short opening and closing time, and energy efficiency, effectively extending the product's service life.

[0059] like Figure 8 As shown, the sample channel 322 is further arranged in a funnel shape to guide the sample flow and guide components such as the injection tube and sampling needle during sampling, storage, and testing. This greatly reduces the positioning accuracy requirements between components during sampling, storage, and testing, and also reduces the automation control requirements, which is conducive to the intelligent automated operation and maintenance of processes such as sampling, storage, and testing. In addition, it can also reduce the flow rate control accuracy during sample storage and prevent sample splashing.

[0060] like Figure 8 As shown, the sample channel 322 is further centered on the cover body 321, which helps to further reduce the positioning accuracy requirements between components during sampling, storage, and testing.

[0061] In one embodiment, the sample storage assembly 300 adopts the sample storage container 320 described above, and its specific working process is as follows: The sample container 320 is placed on the turntable, and the driving component drives the turntable to rotate, moving the sample container 320 to the sample storage position. The channel opening and closing control mechanism 323 operates to control the sample channel 322 to open, and the sampling assembly 200 extracts the sample and injects it into the sample container 320. After the sample is injected, if no fixative is needed, the channel opening and closing control mechanism 323 controls the sample channel 322 to close. If fixative is needed, the channel opening and closing control mechanism 323 can control the sample channel 322 to close or not. If the channel opening and closing control mechanism 323 controls the sample channel 322 to close, the driving component drives the turntable to rotate, moving the sample container 320 to the fixative addition position. The actuator 342 drives the turntable 341 to rotate. The fixative delivery pipeline corresponding to the fixative is located after the fixative addition station. At the same time, the channel opening and closing control mechanism 323 controls the sample channel 322 to open, and the top pressure motor works to reciprocate the pressure structure 349 against the compression structure 348 to generate compressed gas to guide the fixative along the fixative delivery pipeline into the sample storage container 320. After the fixative is added, the channel opening and closing control mechanism 323 controls the sample channel 322 to close. In the above operation, the sample channel 322 can be opened only when the sample is injected and / or the fixative is added, so as to minimize the time the sample storage container 320 is open and reduce the risk of contamination by external impurities during the detection process.

[0062] like Figure 8 As shown, in this embodiment, the channel opening / closing control mechanism 323 includes a driving component and a switch structure connected to the output end of the driving component for opening or closing the sample channel 322. Specifically, the driving component operates to drive the switch structure to open or close the sample channel 322, thereby controlling the opening or closing of the sample channel 322.

[0063] like Figure 8 As shown, in this embodiment, the driving assembly includes a driving unit disposed within the cover body 321 and whose output end is connected to a switch structure, a power source electrically connected to the driving unit, and a control component electrically connected to the driving unit for controlling the operation of the driving unit. Specifically, the control component controls the operation of the driving unit to control the opening or closing of the sample channel 322, while the power source provides working power to the driving unit.

[0064] It should be understood that in this embodiment, the sample channel 322 is centrally located on the cover body 321. Therefore, the drive unit is eccentrically arranged, and the drive unit only needs to control the opening and closing of the sample channel 322. Compared with the prior art (the drive structure controls the opening and closing of two channels at the same time), the torque / torque borne by the output end of the drive unit is small, which is beneficial to reducing the manufacturing cost of the drive unit.

[0065] In this embodiment, the drive assembly further includes a transmission gear fixedly connected to the output shaft of the drive unit, and the switch structure includes a switch element rotatably disposed within the cover body 321 and meshing with the transmission gear for opening or closing the sample channel 322. Specifically, the drive unit operates to drive the transmission gear to rotate, which in turn drives the switch element to rotate, thereby opening or closing the sample channel 322; that is, torque transmission is achieved through the meshing of the transmission gear and the switch element, further reducing the torque / torque borne by the output shaft of the drive unit during operation, thus helping to reduce the manufacturing cost of the drive unit; in addition, compared with the existing solution, the rotation to close the sample channel 322 is faster and takes less time, which is beneficial for quickly opening and closing the sample channel 322 in processes such as sampling storage and sampling detection, thereby improving work efficiency; in actual operation, the short switching time of the sample channel 322 also helps to reduce the energy consumption of the drive assembly and extend its service life; furthermore, the fast switching speed is also beneficial for reducing the volatilization time of the analyte in the water sample when detecting volatile substances, thereby improving its detection accuracy.

[0066] In summary, after reading the detailed disclosure of this specification, those skilled in the art will understand that the foregoing detailed disclosure is presented by way of example only and is not restrictive. Although not explicitly stated herein, those skilled in the art will understand that this specification requires various reasonable changes, improvements, and modifications to the embodiments. These changes, improvements, and modifications are intended to be made by this specification and are within the spirit and scope of the exemplary embodiments described herein.

[0067] Furthermore, certain terms in this specification have been used to describe embodiments of this specification. For example, "an embodiment," "an embodiment," and / or "some embodiments" mean that a particular feature, structure, or characteristic described in connection with that embodiment may be included in at least one embodiment of this specification. Therefore, it is to be emphasized and understood that two or more references to "an embodiment" or "an embodiment" or "alternative embodiment" in various parts of this specification do not necessarily refer to the same embodiment. Moreover, specific features, structures, or characteristics may be suitably combined in one or more embodiments of this specification.

[0068] Finally, it should be understood that the embodiments disclosed herein are illustrative of the principles of the embodiments described in this specification. Other modified embodiments are also within the scope of this specification. Therefore, the embodiments disclosed in this specification are merely examples and not limitations. Those skilled in the art can implement the applications described in this specification using alternative configurations based on the embodiments in this specification. Therefore, the embodiments in this specification are not limited to the embodiments precisely described in the applications.

Claims

1. A water quality sampling device, characterized in that, The sample assembly includes a sampling assembly (200) and a sample storage assembly (300). The sampling assembly (200) is used to extract samples into the sample storage assembly (300). The sample storage assembly (300) includes a multi-station turntable (310), a sample storage container (320) arranged on the multi-station turntable (310), and a fixative addition mechanism (340). The multi-station turntable (310) is circumferentially spaced above the sample storage station corresponding to the sampling assembly (200) and a fixative addition station corresponding to the fixative addition mechanism (340). The multi-station turntable (310) is used to move the sample storage container (320) through the sample storage station and the fixative addition station. The fixative addition mechanism (340) is used to add fixative into the sample storage container (320).

2. The water quality sampling device according to claim 1, characterized in that, The fixative adding mechanism (340) includes a turntable assembly, a fixative storage container (343) arranged on the turntable assembly, a fixative delivery pipe connected to the fixative storage container (343), and a fixative delivery component connected to the fixative delivery pipe. There are N fixative storage containers (343), which are arranged at intervals on the turntable assembly. The fixative delivery component and the fixative delivery pipe are arranged in a one-to-one correspondence, and N is a positive integer.

3. The water quality sampling device according to claim 2, characterized in that, The fixative delivery assembly includes a compression structure (348) connected to the fixative delivery pipeline, a pressure-blocking structure (349) for pressing the compression structure (348), and a top-pressure motor whose output end is connected to the pressure-blocking structure (349). The compression structure (348) and the fixative delivery pipeline are arranged in a one-to-one correspondence.

4. The water quality sampling device according to claim 3, characterized in that, The fixative delivery pipeline includes a dispensing pipeline (344) connected to the fixative storage container (343) and the compression structure (348) respectively, a dispensing check valve (345) installed on the dispensing pipeline (344), a dispensing pipeline (346) connected to the dispensing pipeline (344) and the compression structure (348) respectively, and a dispensing check valve (347) installed on the dispensing pipeline (346).

5. The water quality sampling device according to any one of claims 1-4, characterized in that, The water quality sampling device also includes a switch cover assembly (330), a multi-station turntable (310) with switch cover stations corresponding to the switch cover assembly (330), and a fixed base (311) arranged on the switch cover station for circumferential positioning of the sample container (320).

6. The water quality sampling device according to claim 5, characterized in that, The water quality sampling device also includes an overflow sampling mechanism, which includes a drain hole opened on a fixed base (311) and a collection funnel (410) arranged below the drain hole.

7. The water quality sampling device according to any one of claims 1-4, characterized in that, The sample storage container (320) includes a container body and a container lid for sealing the container body. The container lid includes a lid body, a sample channel extending downward from the top of the lid body for communicating with the inner cavity of the container body, and a channel opening and closing control mechanism disposed in the lid body for controlling the opening or closing of the sample channel.

8. The water quality sampling device according to any one of claims 1-4, characterized in that, The sampling assembly (200) includes a sampling pump (210), a sampling pipeline (220), and a filtration assembly (230). The sampling pipeline (220) is connected to the sample storage assembly (100), the sampling pump (210), and the filtration assembly (230), respectively, and the output end is located at the sample storage station.

9. The water quality sampling device according to any one of claims 1-4, characterized in that, The water sampling device also includes a sample storage assembly (100) for storing samples for sedimentation.

10. The water quality sampling device according to claim 9, characterized in that, The sample storage assembly (100) includes a sample storage container (110), a multi-parameter detection component, and a quality control component. The sample storage container (110) is provided with a quality control station and a detection station at intervals. The quality control component is arranged on the quality control station, and the detection station has an opening for the detection end of the multi-parameter detection component to extend into.

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