Sampling device and water quality monitoring device

Abstract

The invention discloses a sampling device and a water quality monitoring device. The sampling device comprises a sample groove, a test paper conveying mechanism and a sampling mechanism, the sample groove is used for accommodating a sample and is provided with an opening; the test paper conveying mechanism is arranged at the opening of the sample groove and used for conveying test paper so that the test paper can pass through the opening. The sampling mechanism is arranged in the sample groove and can rotate to dip a sample, and the sampling mechanism can also rotate to rinse and throw sample liquid drops onto the test paper. By arranging the sampling mechanism and rotating the sampling mechanism, the sampling mechanism can dip a sample and then transfer the sample to the test paper through rinsing and throwing, and the amount of the sample transferred to the test paper can be adjusted by adjusting the amount of the sample which can be dipped at a time, so that micro-sampling is realized, and the detection amount is ensured not to exceed the bearable amount of the test paper; therefore, the experiment accuracy is improved.

Description

Technical Field

[0001] The present application relates to the technical field of water quality monitoring, and in particular to a sampling device and a water quality monitoring device. Background Art

[0002] In the process of using test paper to monitor water quality parameters, it is usually necessary to immerse the test paper in the sample to be tested. After the indicator on the test paper reacts with the sample to be tested and produces a color change, the color is observed by the naked eye or observed and identified using an optical recognition module. The color of the test paper is analyzed using image analysis technology to obtain qualitative and quantitative information on the observed object in the water sample and determine the water quality indicators.

[0003] Since the test paper can only hold a limited amount of sample during sampling, it is necessary to take an appropriate amount of sample and put a small amount of water sample in contact with the test paper. The appropriate amount of water for sampling is usually at the microliter level, so if the sample water volume is too large, it will damage the test paper and wash away the indicator contained in the test paper, resulting in a decrease in detection accuracy. Summary of the invention

[0004] In order to solve at least one of the above technical problems, the present application provides a sampling device and a water quality monitoring device, which can realize trace sampling in water samples, and the technical solution adopted is as follows.

[0005] The sampling device provided in the first aspect of the present application includes a sample trough, a test paper transport mechanism and a sampling mechanism, the sample trough is used to accommodate samples, and the sample trough is provided with an opening; the test paper transport mechanism is arranged at the opening of the sample trough, and the test paper transport mechanism is used to transport the test paper so that the test paper passes through the opening; the sampling mechanism is arranged in the sample trough, the sampling mechanism can rotate to dip the sample, the sampling mechanism can also rotate to rinse the sample droplets onto the test paper, or the sampling mechanism can rotate to dip the sample, and a part of the sampling mechanism is in contact with the test paper to transfer the sample to the test paper.

[0006] In certain embodiments of the first aspect of the present application, the sampling mechanism includes a rotating body and a sampling component, the sampling component is arranged on the outer peripheral surface of the rotating body, the rotating body can be used to drive the sampling component to rotate to immerse in the sample to dip the sample, and the rotating body is also used to drive the sampling component to rotate to leave the sample and rinse the sample droplets onto the test paper.

[0007] In certain embodiments of the first aspect of the present application, the sampling component may be any one of a sampling spoon, a sampling ring, and a sampling block.

[0008] In certain embodiments of the first aspect of the present application, the sampling mechanism further includes a sampling arm, one end of the sampling arm is connected to the outer circumferential surface of the rotating body, and the other end of the sampling arm is connected to the sampling component.

[0009] In certain embodiments of the first aspect of the present application, the sampling arm is an elastic member, and the sampling arm can be bent and restored along the length direction.

[0010] In certain embodiments of the first aspect of the present application, the test paper transport mechanism includes a transport belt, which is used to transport the test paper, and a plane of the transport belt is arranged parallel to or perpendicular to the opening.

[0011] In certain embodiments of the first aspect of the present application, the sampling mechanism includes a sampling wheel, a portion of which is immersed in the sample in the sample slot, and another portion of which is exposed outside the sample liquid surface for contact with the test paper.

[0012] In certain embodiments of the first aspect of the present application, the outer peripheral surface of the sampling wheel is provided with a burr structure or a brush structure.

[0013] In certain embodiments of the first aspect of the present application, the sampling device further comprises a driving mechanism, wherein the driving mechanism is connected to the sampling mechanism, and the driving mechanism is used to drive the sampling mechanism to rotate.

[0014] In the second aspect, the present application also provides a water quality monitoring device, comprising a test paper, a camera module and the sampling device provided in the first aspect, wherein the test paper is arranged on the test paper transport mechanism, the camera module is arranged downstream of the sampling mechanism along the test paper transport direction, and the camera module is used to identify the test paper after the sample droplets are added.

[0015] The embodiments of the present application have at least the following beneficial effects: by providing a sampling mechanism and rotating the sampling mechanism, the sampling mechanism can dip the sample and transfer the sample to the test paper by rinsing or directly contacting the test paper, and by adjusting the amount of sample that can be dipped at a single time or adjusting the size of the contact portion with the test paper, the amount of sample transferred to the test paper can be adjusted, thereby achieving micro-sampling, ensuring that the detection amount does not exceed the carrying capacity of the test paper, thereby improving the accuracy of water quality detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The aspects and advantages described and / or attached in the embodiments of the present application will become apparent and easy to understand in conjunction with the following drawings. It should be noted that the embodiments embodied in the following drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0017] Figure 1 A schematic diagram of the structure of an example of a sampling device provided in Example 1 of the present application;

[0018] Figure 2 for Figure 1 AA section view;

[0019] Figure 3 A schematic diagram of the structure of another example of the sampling device provided in Example 1 of the present application;

[0020] Figure 4 A schematic diagram of the structure of the sampling device provided in Example 2 of the present application;

[0021] Figure 5 for Figure 4 BB cross-section diagram;

[0022] Figure 6 for Figure 5 A partial enlarged view of point C;

[0023] Figure 7 This is a schematic diagram of the structure of the water quality monitoring device provided in Example 3 of the present application.

[0024] Reference numerals: 1000, sampling device; 1100, sample slot; 1110, opening; 1200, test paper transport mechanism; 1210, transport belt; 1220, tension wheel; 1300, sampling mechanism; 1310, rotating body; 1320, sampling component; 1330, sampling arm; 1400, driving mechanism;

[0025] 2000, sampling device; 2100, sample slot; 2110, opening; 2200, test paper transport mechanism; 2210, transport belt; 2300, sampling mechanism; 2310, sampling wheel; 2311, burr structure; 2400, driving mechanism;

[0026] 3000. Water quality monitoring device; 3100. Test paper; 3200. Camera module. DETAILED DESCRIPTION

[0027] Combine the following Figures 1 to 7 Embodiments of the present application are described in detail, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0028] In the description of the present application, it should be understood that if the terms "center", "middle", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply 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 application. In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, "multiple" means two or more.

[0029] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0030] Embodiment 1

[0031] See also Figures 1 to 3 The present application provides a sampling device 1000, including a sample slot 1100, a test paper transport mechanism 1200 and a sampling mechanism 1300. The sample slot 1100 is used to accommodate a sample, and the sample slot 1100 is provided with an opening 1110. The test paper transport mechanism 1200 is disposed at the opening 1110 of the sample slot 1100, and the test paper transport mechanism 1200 is used to transport the test paper 3100 so that the test paper 3100 passes through the opening 1110. The sampling mechanism 1300 is disposed in the sample slot 1100, and the sampling mechanism 1300 can rotate to dip the sample, and the sampling mechanism 1300 can also rotate to rinse the sample droplets onto the test paper 3100.

[0032] By setting up the sampling mechanism 1300 and rotating the sampling mechanism 1300, the sampling mechanism 1300 can dip the sample and transfer the sample to the test paper 3100 by rinsing and shaking. By adjusting the amount of sample that can be dipped at a time, the amount of sample transferred to the test paper 3100 can be adjusted, thereby achieving micro-sampling, ensuring that the detection amount does not exceed the carrying capacity of the test paper 3100, thereby improving the accuracy of the experiment, and can achieve a high degree of automation, and can continuously and repeatedly monitor water quality indicators, making up for the defect of manual monitoring that is time-consuming and laborious.

[0033] In some embodiments, the sampling mechanism 1300 includes a rotating body 1310 and a sampling component 1320. The sampling component 1320 is disposed on the outer circumference of the rotating body 1310. The rotating body 1310 can be used to drive the sampling component 1320 to rotate to immerse in the sample to dip the sample. The rotating body 1310 is also used to drive the sampling component 1320 to rotate to leave the sample and to rinse the sample liquid droplets onto the test paper 3100. By providing the rotating body 1310 and the sampling component 1320, and arranging the sampling component 1320 on the outer circumference of the rotating body 1310, the rotation radius of the sampling mechanism 1300 can be increased, and the sampling component 1320 is used to directly contact the sample, while the rotating body 1310 is used to drive the sampling component 1320 to rotate by rotating itself, and the rotating body 1310 can avoid direct contact with the sample in the sample slot 1100. When the rotating body 1310 rotates to a certain moment, the sampling component 1320 immerses in the sample to pick up the sample. As the rotating body 1310 continues to rotate, the sampling component 1320 leaves the sample and uses centrifugal action to rinse the sample in the form of droplets onto the test paper 3100, thus completing the sampling. Since the sample is transferred to the test paper 3100 by centrifugal action, the sampling component 1320 will not directly contact the test paper 3100. While ensuring the cleanliness of the test paper 3100, it can also avoid damaging the test paper 3100 during the rotation of the sampling component 1320. Moreover, since the sample droplets are added to the test paper 3100 during rinsing, the sample droplets do not contact the test paper 3100 at other times, which can achieve intermittent sampling of the test paper 3100 and effectively avoid the droplets connecting into pieces on the test paper 3100 to affect the detection effect.

[0034] Optionally, according to actual sampling requirements, a plurality of sampling components 1320 may be disposed on the outer circumferential surface of the rotating body 1310 , and the plurality of sampling components 1320 may be disposed at intervals.

[0035] In some embodiments, the sampling component 1320 can be any one of a sampling spoon, a sampling ring, and a sampling block. Specifically, the sampling spoon can be a spoon-shaped structure with a depression in the middle, and the depression area can be used to accommodate the sample. The sampling ring is a structure with a through hole in the middle. When the sampling ring is immersed in the sample and taken out, the sample can be maintained in the through hole in the middle of the sampling ring due to the surface tension of the liquid. During the rotation of the rotating body 1310, the surface tension of the liquid in the sampling ring is destroyed by centrifugal action, so that the sample droplets are rinsed onto the test paper 3100. By setting the sampling component 1320 as any one of a sampling spoon, a sampling ring, and a sampling block, the sampling requirements of different samples can be met. The user can select a suitable sampling component 1320 for sampling according to the different characteristics of the sample, such as viscosity and chemical characteristics, and the required amount of sampling.

[0036] Optionally, when a plurality of sampling components 1320 are provided on the rotating body 1310, the plurality of sampling components 1320 may adopt the same structural form, for example, all are configured as sampling spoons or sampling rings, or the plurality of sampling components 1320 may respectively adopt two or more structural forms, for example, one part of the sampling components 1320 is configured as a sampling spoon, and another part is configured as a sampling ring, etc. The plurality of sampling components 1320 may be configured as the same sampling specifications, or different sampling specifications. Exemplarily, sampling components 1320 of the same specification or type may be used for sampling, or sampling components 1320 of multiple specifications or types may be used in combination.

[0037] In some embodiments, the sampling mechanism 1300 further includes a sampling arm 1330, one end of which is connected to the outer circumference of the rotating body 1310, and the other end of the sampling arm 1330 is connected to the sampling component 1320. The use of the sampling arm 1330 and the sampling component 1320 can increase the rotation radius of the sampling component 1320, enhance the centrifugal effect, and thus enhance the rinsing effect, ensuring that the sample dipped can leave the sampling component 1320 and reach the test paper 3100. At the same time, the sampling arm 1330 can be used with rotating bodies 1310 and sampling components 1320 of different sizes, so that the size design of the rotating body 1310 can be reduced, and the rotating body 1310 is prevented from contacting the sample while ensuring that the sampling component 1320 can be immersed in the sample, thereby improving the reliability of the use of the rotating body 1310.

[0038] In some embodiments, the sampling arm 1330 is an elastic member, and the sampling arm 1330 can be bent and restored along the length direction. During the sampling process of the sampling component 1320, the sampling component 1320 and the sampling arm 1330 will be subject to the liquid flow resistance of the sample in the sample slot 1100 and the air resistance outside the sample slot 1100. By setting the sampling arm 1330 to have an elastic structure, the sampling arm 1330 can be bent and deformed in the opposite direction of the rotation direction of the sampling component 1320 after being subjected to resistance and accumulate as elastic potential energy. During the rotation and swishing process of the sampling mechanism 1300, the kinetic energy of the sampling mechanism 1300 and the elastic potential energy generated by the deformation of the sampling arm 1330 are superimposed, thereby increasing the swishing force and the speed of the sample droplets when leaving, ensuring that the sample droplets can be swung onto the test paper 3100, and improving the swishing effect during sampling.

[0039] In some embodiments, the test paper transport mechanism 1200 includes a transport belt 1210, which is used to transport the test paper 3100. The plane of the transport belt 1210 is parallel to or perpendicular to the opening 1110. The test paper 3100 is transported by the transport belt 1210, and the plane of the transport belt 1210 is parallel to or perpendicular to the opening 1110 of the sample slot 1100 (e.g., Figure 1 as shown) or vertically (as Figure 3As shown), it can not only continuously transport the test paper 3100 to improve the convenience of detection, but also flexibly set the relative positions of the test paper 3100 and the sample slot 1100 according to the installation requirements of the actual detection equipment, while reducing the difficulty of installing the test paper transportation mechanism 1200, it also makes it convenient for the sampling device 1000 to be used in conjunction with other detection equipment.

[0040] Optionally, the test paper 3100 can be arranged at intervals on the conveyor belt 1210, and the interval distance corresponds to the time interval of the swishing of the sampling mechanism 1300, so that each test paper 3100 passing through the opening 1110 of the sample slot 1100 can receive the sample liquid; or, the test paper 3100 can be arranged continuously on the conveyor belt 1210, so that each time the sample liquid is swished, there is a corresponding test paper 3100 that can receive it. Alternatively, the conveyor belt 1210 itself is composed of test papers 3100, and after the sampling is completed, a test paper 3100 belt with sample liquid areas distributed at intervals can be obtained, and the test paper 3100 belt can be divided and used later or directly used for detection.

[0041] Exemplarily, tensioning wheels 1220 are provided at both ends of the conveyor belt 1210 for tensioning, thereby improving the stability of the test paper 3100 during movement. Exemplarily, a driving mechanism 1400 may also be provided to drive the tensioning wheel 1220, thereby driving the test paper 3100 to move, thereby realizing automatic transportation of the test paper 3100.

[0042] In some embodiments, the sampling device 1000 further includes a driving mechanism 1400, which is connected to the sampling mechanism 1300, and the driving mechanism 1400 is used to drive the sampling mechanism 1300 to rotate. By setting the driving mechanism 1400, the driving mechanism 1400 drives the sampling mechanism 1300 to rotate, and the automatic sampling of the sampling device 1000 can be realized. And according to the specific setting position of each mechanism of the sampling device 1000, the rotation mode of the sampling mechanism 1300 can be changed by changing the driving mode of the driving mechanism 1400, so that the arrangement of the sampling device 1000 is more flexible, and it is also convenient for the sampling device 1000 to be used in conjunction with other detection devices. Optionally, the driving mechanism 1400 can drive the sampling mechanism 1300 to rotate continuously, or the driving mechanism 1400 can drive the sampling mechanism 1300 to rotate back and forth.

[0043] Embodiment 2

[0044] See also Figures 4 to 6The present application provides a sampling device 2000, comprising a sample slot 2100, a test paper transport mechanism 2200 and a sampling mechanism 2300. The sample slot 2100 is used to accommodate a sample, and the sample slot 2100 is provided with an opening 2110. The test paper transport mechanism 2200 is disposed at the opening 2110 of the sample slot 2100, and the test paper transport mechanism 2200 is used to transport a test paper 3100 so that the test paper 3100 passes through the opening 2110. The sampling mechanism 2300 is disposed in the sample slot 2100, and the sampling mechanism 2300 can rotate to dip a sample, and a portion of the sampling mechanism 2300 contacts the test paper 3100 to transfer the sample to the test paper 3100. By setting up the sampling mechanism 2300 and rotating the sampling mechanism 2300, the sampling mechanism 2300 can dip the sample and transfer the sample to the test paper 3100 by partially contacting the test paper 3100. By adjusting the amount of sample that can be dipped at a time or adjusting the size of the contact portion with the test paper 3100, the amount of sample transferred to the test paper 3100 can be adjusted, thereby achieving micro-sampling and ensuring that the detection amount does not exceed the carrying capacity of the test paper 3100, thereby improving the accuracy of the experiment.

[0045] In some embodiments, the sampling mechanism 2300 includes a sampling wheel 2310, a portion of which is immersed in the sample in the sample tank 2100, and another portion of the sampling wheel 2310 is exposed outside the sample liquid surface for contact with the test paper 3100. Since a portion (e.g., the bottom) of the sampling wheel 2310 is immersed in the sample tank 2100, after the sampling wheel 2310 rotates one circle, the surface of the sampling wheel 2310 can be dipped into the sample, and at this time, the test paper 3100 contacts the sampling wheel 2310, and the sample on the sampling wheel 2310 can be transferred to the test paper 3100 to complete the sampling. By adjusting the contact area and contact angle between the sampling wheel 2310 and the test paper 3100, the sample amount at each sampling can be adjusted, and continuous sampling, intermittent sampling, or random sampling without a fixed time interval can be performed according to actual sampling requirements. In addition, the sampling wheel 2310 is in direct contact with the test paper 3100, and the sampling wheel 2310 can be used to provide support for the test paper 3100, thereby preventing the test paper 3100 from shaking and improving the stability of sampling. The sampling method in which the sampling wheel 2310 and the test paper 3100 are in contact can ensure that the sample droplets are transferred to the test paper 3100, prevent the sample from splashing or sliding, and improve the reliability of sampling.

[0046] In some embodiments, the outer surface of the sampling wheel 2310 is provided with a burr structure 2311 or a brush structure. Taking the burr structure 2311 as an example, the dipping area can be increased by providing the burr structure 2311, and the grooves in the burr structure 2311 can be used to absorb and store samples, so that the sampling wheel 2310 can dip a sufficient amount of sample when immersed in the sample tank 2100, and the adsorption of the sample by the sampling wheel 2310 can be enhanced, so that a sufficient amount of sample can remain attached to the sampling wheel 2310, thereby ensuring that the amount of sample transferred when the sampling wheel 2310 contacts the test paper 3100 can meet the detection requirements. Similarly, the gaps between the brushes in the brush structure can also be used to absorb and store samples, so that when the brush contacts the test paper, the sample can be transferred to the surface of the test paper. Exemplarily, the burr structure 2311 can also be set in the form of a fluff structure on the surface of the sampling wheel 2310.

[0047] Optionally, in Example 2, except that the arrangement of the sampling mechanism 2300 is different from that of Example 1, other structures not described in detail, such as the test paper transport mechanism 2200, the transport belt 2210, the driving mechanism 2400, etc., adopt the same arrangement as that of Example 1, and will not be repeated here.

[0048] Embodiment 3

[0049] See also Figure 7 The present application also provides a water quality monitoring device 3000, including a test paper, a camera module 3200, and the sampling device 1000 provided in the first embodiment or the sampling device 2000 provided in the second embodiment. The test paper is arranged on the test paper transport mechanism 1200, and the camera module 3200 is arranged along the test paper transport direction (such as Figure 7 The dotted arrow direction shown in the figure) is arranged downstream of the sampling mechanism 1300, and the camera module 3200 is used to identify the test paper after the sample droplets are added.

[0050] By applying the sampling device 1000 provided in the present application to a water quality detection device, the collected water quality sample can first be placed in the sample slot 1100, and the test paper transport mechanism 1200 can be used to transport the device. The sample is dipped by the sampling mechanism 1300 and transferred to the test paper, and a test paper carrying the sample can be obtained. The test paper is then moved to the recognition range of the camera module 3200 under the conveying action of the test paper transport mechanism 1200. At this time, the camera module 3200 can identify the sample on the test paper, thereby analyzing the water quality sample and determining the water quality index. By adjusting the amount of sample that can be dipped by the sampling mechanism 1300 at a time or adjusting the size of the contact portion of the sampling mechanism 1300 with the test paper, micro-sampling of water quality samples with different dosage requirements can be achieved. At the same time, by adjusting the rotation frequency or rotation mode of the sampling mechanism 1300, or adjusting the arrangement of the test paper in the test paper transport mechanism 1200, continuous sampling detection, interval sampling detection or random sampling detection can be achieved according to the detection requirements of the water quality sample. In addition, by providing a driving mechanism 1400 for the sampling mechanism 1300 and the test paper transport mechanism 1200, the automatic operation of the water quality monitoring device 3000 can be achieved. The user can use a variety of different modes to monitor water quality by flexibly adjusting the sampling method of the sampling mechanism 1300 and the operation mode of the test paper transport mechanism 1200.

[0051] In the description of this specification, if the reference terms "one embodiment", "some examples", "some embodiments", "illustrative embodiment", "example", "specific example", or "some examples" appear, it means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0052] The above describes the implementation methods of the present application in detail in conjunction with the accompanying drawings, but the present application is not limited to the above implementation methods. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present application.

[0053] In the description of this application, if "," appears in the patent name, it means an "and" relationship, not an "or" relationship. For example, if the patent name is "a kind of A, B", it means that the content required to be protected by this application is: the technical solution with the subject name A and the technical solution with the subject name B.

Claims

1. A sampling device, characterized in that: include A sample tank, used for accommodating a sample, wherein the sample tank is provided with an opening; A test paper transport mechanism is arranged at the opening of the sample slot, and the test paper transport mechanism is used to transport the test paper so that the test paper passes through the opening; A sampling mechanism is arranged in the sample slot, the sampling mechanism can rotate to dip the sample, and the sampling mechanism can also rotate to rinse the sample droplets onto the test paper, or The sampling mechanism can rotate to dip the sample, and a part of the sampling mechanism contacts the test paper to transfer the sample to the test paper.

2. The sampling device according to claim 1, characterized in that: The sampling mechanism includes a rotating body and a sampling component, wherein the sampling component is arranged on the outer peripheral surface of the rotating body, and the rotating body can be used to drive the sampling component to rotate to immerse in the sample to dip the sample. The rotating body is also used to drive the sampling component to rotate to leave the sample and rinse the sample droplets onto the test paper.

3. The sampling device according to claim 2, characterized in that: The sampling component can be any one of a sampling spoon, a sampling ring, and a sampling block.

4. The sampling device according to claim 2, characterized in that: The sampling mechanism further comprises a sampling arm, one end of which is connected to the outer peripheral surface of the rotating body, and the other end of which is connected to the sampling component.

5. The sampling device according to claim 4, characterized in that: The sampling arm is an elastic member, and the sampling arm can be bent and restored along the length direction.

6. The sampling device according to any one of claims 1 to 5, characterized in that: The test paper transport mechanism comprises a transport belt, which is used to transport the test paper, and the plane of the transport belt is arranged parallel or vertically to the opening.

7. The sampling device according to claim 1, characterized in that: The sampling mechanism comprises a sampling wheel, a part of which is immersed in the sample in the sample slot; the other part of which is exposed outside the sample liquid surface for contacting with the test paper.

8. The sampling device according to claim 7, characterized in that: The outer peripheral surface of the sampling wheel is provided with a burr structure or a brush structure.

9. The sampling device according to claim 1, characterized in that: The sampling device further comprises a driving mechanism, which is connected to the sampling mechanism and is used to drive the sampling mechanism to rotate.

10. A water quality monitoring device, characterized in that: It comprises a test paper, a camera module and a sampling device as described in any one of claims 1 to 9, wherein the test paper is arranged on the test paper transport mechanism, the camera module is arranged downstream of the sampling mechanism along the test paper transport direction, and the camera module is used to identify the test paper after the sample droplets are added.

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