Water body sample collecting device

Abstract

The invention provides a water body sample collecting device which comprises a supporting frame and a water sample storage structure, and the water sample storage structure comprises a water inlet, a driving mechanism, a plugging piece, a controller, a first sensor and a second sensor; the first sensor is used for detecting water depth and temperature information of the position of the acquisition device and outputting the information to the controller; the second sensor is used for outputting a detection signal to the controller when detecting that the water body sample in the water sample storage structure reaches a preset water level; the controller sends an opening signal to the driving mechanism based on the water depth and temperature information, or sends a closing signal to the driving mechanism when receiving a detection signal; when receiving the opening signal, the driving mechanism drives the blocking piece to move in the direction away from the water inlet to open the water inlet or when receiving the closing signal, the driving mechanism drives the blocking piece to move towards the water inlet to close the water inlet. The device can prevent water samples from being polluted by water layers with different depths in the collection process.

Description

Technical Field

[0001] The present invention relates to the technical field of water sample collection, and more specifically, to a water sample collection device. Background Art

[0002] The thermal stratification of lake water has an important impact on the ecological environment, climate change and human life, and is an important factor in accelerating the outbreak of blue-green algae in eutrophic water bodies. The thermal stratification of lake water can affect the physical parameters of lake water at different depths, such as nutrients, dissolved oxygen, and pH value, and determines the eutrophication and productivity of lakes at different stages and depths, and plays an important role in the changes in water quality and water environment of lake water bodies. Therefore, the study of the vertical distribution of physical and chemical indicators of lake water bodies is crucial for lake pollution and governance.

[0003] To conduct a study on lake water stratification, it is necessary to collect water samples at different depths and obtain basic physical and chemical data of the water through analysis and measurement. The water samples for analysis should be representative and reflect the chemical composition and characteristics of the water. Therefore, the water sampling device is required to accurately collect water samples at different depths and avoid contamination of water samples at different layers. Most of the existing water sampling tools can only collect surface water samples, while some tools that can collect deep water samples can hardly avoid the problem of contamination of water layers at different depths during the sampling process. Summary of the invention

[0004] In view of the above problems, the present invention provides a water sample collection device to solve the problem that the existing water sample sampling tools are difficult to prevent the water sample from being contaminated by water from different depths during the collection process.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] The present invention provides a water sample collection device, comprising:

[0007] Support frame;

[0008] A water sample storage structure disposed on the support frame, the water sample storage structure comprising a water inlet;

[0009] A driving mechanism disposed on the supporting frame;

[0010] A blocking member connected to the driving mechanism and used for blocking the water inlet;

[0011] A controller; a first sensor disposed on the support frame and a second sensor disposed on the water sample storage structure;

[0012] The first sensor is used to detect the water depth and temperature information at the location of the collection device and output it to the controller; the second sensor is used to output a detection signal to the controller when it detects that the water sample in the water sample storage structure reaches a predetermined water level;

[0013] The controller is configured to send an opening signal to the driving mechanism based on the water depth and temperature information, or send a closing signal to the driving mechanism upon receiving a detection signal from the second sensor;

[0014] The driving mechanism is configured to drive the blocking member to move away from the water inlet to open the water inlet when receiving the opening signal, or to drive the blocking member to move toward the water inlet to close the water inlet when receiving the closing signal.

[0015] A preferred solution is that the water sample storage structure includes a water storage tank body with a water inlet and a cylindrical structure formed around the water inlet of the water storage tank body; the cylindrical structure includes a channel connected to the water inlet of the water storage tank body; the blocking member can be slidably arranged in the channel and fits with the inner wall of the channel; and a plurality of water inlet holes connected to the channel are formed on the circumferential side wall of the cylindrical structure.

[0016] The preferred solution is that the driving mechanism includes a driving motor fixed on a supporting frame, a wheel fixed to the rotating shaft of the driving motor and a transmission rod rotatably arranged on the supporting frame; the driving motor is electrically connected to the controller; one end of the transmission rod is connected to the sealing member, and the other end is connected to the wheel through a connecting member.

[0017] The preferred solution is that the water storage tank body includes two water inlets arranged opposite to each other, both water inlets are provided with a cylindrical structure, and both channels of the two cylindrical structures are provided with a blocking member;

[0018] The driving mechanism comprises two connecting members which can be respectively wound on the same wheel disc and two transmission rods which are respectively connected to the two connecting members; the two transmission rods are respectively connected to the blocking members in the two cylindrical structures.

[0019] A preferred solution is that the driving mechanism also includes an elastic part located inside the water storage tank body, and both ends of the elastic part are respectively connected to two sealing parts; the driving motor is used to no longer provide the sealing parts with the power required to avoid the water inlet and the water inlet hole when receiving the closing signal, and the two sealing parts are respectively pulled by the elastic part toward the water inlet to seal the water inlet.

[0020] A preferred solution is that the transmission rod includes a first rod body having one end connected to the wheel plate through a connecting piece and a second rod body rotatably connected to the other end of the first rod body; one end of the second rod body is rotatably connected to the first rod body, and the other end is fixed to the blocking piece; the middle section of the first rod body is rotatably connected to the support frame.

[0021] A preferred solution is that the water sample collection device also includes a vertically arranged slide bar arranged inside the water storage tank body, and a float slidably arranged on the slide bar; the second sensor is used to output a detection signal to the controller when the float is detected.

[0022] A preferred solution is that the water storage tank body is made of transparent material; the second sensor includes a transmitter and a receiver respectively arranged on both sides of the water storage tank body; the transmitter is used to emit horizontal light; the receiver is used to receive the horizontal light emitted by the transmitter, and outputs a detection signal to the controller when no horizontal light is received.

[0023] A preferred solution is that the blocking member is spherical and made of rubber; the diameter of the blocking member is larger than the inner diameter of the water inlet.

[0024] A preferred solution is that the driving mechanism, the first sensor and the second sensor are all electrically connected to the controller. The beneficial effects of the present invention are:

[0025] The present invention can seal the water inlet on the water storage tank body before and after water sample collection, so as to prevent water from non-water sample collection positions from entering the water storage tank body and causing pollution to the collected samples and the analysis and measurement results of the collected samples. At the same time, the water depth and water temperature and other information of the water sample collection position can be obtained in real time to ensure the accuracy of the water sample collection position, and the water inlet on the water storage tank body can be opened when the water sample collection position of the precise depth or precise water temperature is reached to collect the water sample of the layer, thereby improving the accuracy of the collected samples. The present invention realizes the collection of water samples at the layer of precise depth or precise water temperature and prevents the water samples from being polluted by water of different depths during the collection process, meeting the needs of the vertical distribution research of the physical and chemical indicators of lake water bodies. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The specific implementation modes of the present invention are further described in detail below in conjunction with the accompanying drawings.

[0027] Figure 1 It is one of the overall structural schematic diagrams of the present invention.

[0028] Figure 2 This is the second schematic diagram of the overall structure of the present invention.

[0029] Figure 3 It is a schematic diagram of the state of the wheel disc when the water inlet of the present invention is blocked.

[0030] Figure 4 It is a schematic diagram of the wheel state when the water inlet of the present invention is opened. DETAILED DESCRIPTION

[0031] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention unless otherwise specifically stated.

[0032] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

[0033] Techniques and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the techniques and equipment should be considered part of the specification.

[0034] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0035] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0036] In order to solve the problem that the existing deep water sample collection tools are difficult to avoid water samples being contaminated by water from different depths during the collection process, the present invention provides a water sample collection device, combined with Figures 1 to 4As shown, specifically, the water sample collection device includes: a support frame 1, which serves as a mounting base for other components. A water sample storage structure is arranged on the support frame 1, and the water sample storage structure includes a water inlet 52. The water sample storage structure is used to store water samples, and the water sample is injected into the water sample storage structure through the water inlet 52. A driving mechanism is arranged on the support frame 1; a sealing member connected to the driving mechanism for sealing the water inlet; the driving mechanism can drive the sealing member to move. A controller; a first sensor arranged on the support frame 1 and a second sensor arranged on the water sample storage structure; the controller is used to receive and send signals. The above-mentioned driving mechanism, the first sensor and the second sensor are all electrically connected to the controller through cables to facilitate stable signal transmission between each other and ensure the accuracy of the water collection process. The collection of stratified water samples from lakes is of great value for understanding the physical and chemical processes of water bodies and the functions of ecosystems. The device of the present invention can accurately measure the water temperature gradient at different depths to locate the thermocline and calculate the heat reserve of the water body, revealing the vertical distribution patterns of dissolved oxygen and nutrients; the stratified data of water samples can track the enrichment characteristics of pollutants (such as heavy metals, microplastics, etc.) and identify biogeochemical activities at the redox interface (such as methane generation, mercury methylation, etc.); at the application level, these data provide key parameters for the site selection of drinking water intakes, early warning of cyanobacterial blooms and ecological restoration projects, especially high-resolution continuous profile sampling and detection can capture the rapid migration process of algae caused by changes in the thermocline, significantly improving the temporal and spatial accuracy of lake environmental management.

[0037] More specifically, the first sensor is used to detect the water depth and temperature information at the location of the collection device and convert the water depth and temperature information into a first detection signal and output it to the controller; the second sensor is used to output a second detection signal to the controller when it detects that the water sample in the water sample storage structure reaches a predetermined water level; the controller is configured to send an opening signal to the drive mechanism based on the water depth and temperature information, or send a closing signal to the drive mechanism when receiving the second detection signal; the drive mechanism is configured to drive the blocking member to move away from the water inlet to open the water inlet when receiving the opening signal, or drive the blocking member to move toward the water inlet to close the water inlet when receiving the closing signal. The above-mentioned first sensor can be specifically a water depth and temperature sensor 4, which can provide the water depth and temperature parameters of the location of the collection device in real time and transmit the above-mentioned data to the controller. The above-mentioned second sensor can be specifically a photoelectric sensor 6. The controller can be specifically a control handle 8, and the panel of the control handle 8 includes a water depth and temperature display screen 81, a photoelectric indicator light 82, a main power switch 83 and a motor power key 84. A power source (not shown) is installed inside the control handle 8, which can supply power to the drive motor 3, the water depth and temperature sensor 3 and the photoelectric sensor 6. When the acquisition device is underwater, turn on the main power switch 83, the display screen 81 displays the depth and water temperature information of the location of the acquisition device in real time, and the photoelectric indicator 82 is always green, indicating that the receiver 62 of the photoelectric sensor 6 normally receives the light 63 emitted by the transmitter 61, and long press the motor power button 84, the drive motor 3 starts to work, drives the wheel 31 to rotate and then drives the blocking member to move.

[0038] In a specific embodiment, the water sample storage structure includes a water storage tank body 5 having a water inlet 52 and a cylindrical structure formed around the water inlet 52 of the water storage tank body 5. The cylindrical structure includes a channel 53 connected to the water inlet 52 of the water storage tank body, and the blocking member is slidably arranged in the channel 53 and fits with the inner wall of the channel 53 to achieve the guidance of the blocking member and the restriction of its movement path and ensure that there is no gap between the blocking member and the inner wall of the channel 53. A plurality of water inlet holes 54 connected to the channel 53 are formed on the peripheral side wall of the cylindrical structure. More specifically, there is a vent hole 51 at the top of the water storage tank body 5, and water inlets 52 are opened on both sides of the water storage tank body 5 near the top. A sealing ring is installed at the water inlet 52. The outside of the water inlet 52 has a cylindrical structure with a channel 53. The channel 53 provides positioning for the rubber ball 21 during movement to ensure that the water inlet 52 can be accurately closed and opened. There is a water inlet hole 54 on the cylindrical structure. When the rubber ball 21 is pulled open (the water inlet 52 is opened), water will flow into the channel 53 from the water inlet hole 54, and then enter the water storage tank body 5 through the water inlet 52. There is a drain hole 55 on one side of the water storage tank body 5 near the bottom, and there is an openable sealing cover 56 at the bottom. The vent hole 51 and the drain hole 55 only need to be opened when the water sample in the water storage tank body 5 is transferred to the water sample storage container after the water sample is collected. The function of the sealing cover 56 is to open the water storage tank body 5 to facilitate cleaning or maintenance of the components inside the tank body. Through the above arrangement, when the blocking piece is pulled outward from the water inlet 52, the water inlet 52 on the water storage tank body 5 is opened. However, since the diameter of the blocking piece is only slightly smaller than the diameter of the channel 53, water cannot directly enter the tank body through the water inlet 52. Therefore, it is necessary to open a circle of water inlet holes 54 on the circumferential side wall of the cylindrical structure. Water can enter the channel 53 through these water inlet holes 54, and then enter the water storage tank body 5 through the water inlet 52.

[0039] In a specific embodiment, regarding the structure of the driving mechanism, the driving mechanism includes a driving motor 3 fixed on the supporting frame 1, the driving motor 3 is located below the water storage tank body 5 and the rotating shaft of the driving motor 3 is arranged along the vertical direction, a wheel disc 31 fixed to the rotating shaft of the driving motor 3 and a transmission rod rotatably arranged on the supporting frame 1; the driving motor 3 is electrically connected to the controller; one end of the transmission rod is connected to the blocking member, and the other end is connected to the wheel disc 31 through a connecting member. The connecting member can be specifically a wire rope 23. The wire rope 23 can be wound on the wheel disc 31 by driving the driving motor 3 to rotate. The driving motor 3 is a DC motor with a waterproof function, which is fixed on the supporting frame 1 and connected to the control handle 8 through a cable. A limiter (not shown in the figure) is arranged at the wheel disc 31 of the driving motor 3 to limit the rotation angle of the wheel disc 31. The specific rotation angle can be achieved by pulling the rubber ball 21 to the exit position of the channel 53.

[0040] Reference Figure 1As shown, the water storage tank body 5 includes two water inlets 52 arranged opposite to each other, and both water inlets 52 are provided with a cylindrical structure, and both channels 53 of the two cylindrical structures are provided with a plugging member; the driving mechanism includes two connecting members that can be respectively wound on the same wheel 31 and two transmission rods respectively connected to the two connecting members; the two transmission rods are respectively connected to the plugging members in the two cylindrical structures. By arranging two opposite water inlets 52 on a water storage tank body 5, water samples at different positions of the same water layer can be collected at the same time, avoiding local water quality deviation caused by unilateral sampling. This ensures that the sample reflects the overall water quality characteristics of the target depth more comprehensively; and the symmetrical water inlet can balance the pressure inside the water storage tank, avoid excessive pressure inside the water storage tank, ensure that the water sample enters the tank body smoothly, and speed up the water inlet speed, thereby improving the sampling efficiency. The present invention only utilizes the drive of a driving motor 3 in conjunction with two transmission rods to achieve the simultaneous opening of the two water inlets 52, and the overall structure is simple. The linkage and integrity between the two blocking parts are greatly improved, the structure of the entire collection device is simplified, and the coordination stability and work efficiency between the two blocking parts are improved.

[0041] Furthermore, in order to realize the automatic blocking of the water inlet 52 by the two blocking members, the driving mechanism also includes an elastic member located in the water storage tank body 5, and the two ends of the elastic member are respectively connected to the two blocking members; the driving motor 3 is used to no longer provide the blocking member with the power required to avoid the water inlet 52 and the water inlet hole 54 when receiving the closing signal. At this time, the two blocking members are blocked by the pulling force of the elastic member toward the water inlet 52, that is, the two blocking members are close to each other under the elastic restoring force of the elastic member to finally achieve the tight sealing of the two water inlets 52. The elastic member can be specifically a rubber tube 24. When the driving motor 3 is started to drive the two blocking members away from each other to avoid the water inlet 52 and the water inlet hole 54, the rubber tube 24 is stretched. When the driving motor 3 is turned off by the controller, the rubber tube 24 is no longer stretched. Under the elastic force of the rubber tube 24, the two blocking members are close to each other to tightly seal the two water inlets 52 to avoid internal water sample contamination.

[0042] Regarding the specific structure of the transmission rod, the transmission rod includes a first rod body 221 connected to the wheel disc 31 at one end through a connecting piece and a second rod body 222 rotatably connected to the other end of the first rod body 221; one end of the second rod body 222 is rotatably connected to the first rod body 221, and the other end is fixed to the blocking member; the middle section of the first rod body 221 is rotatably connected to the support frame 1. The transmission rod has a simple structure and is easy to maintain. Due to its small number of components, it has strong durability and good stability, and has a higher transmission efficiency through a simple mechanical structure. It can convert the rotational motion of the drive motor into the horizontal motion of the blocking member, and has strong adaptability.

[0043] In a specific embodiment, the water sample collection device also includes a vertically arranged slide bar 57 arranged inside the water storage tank body 5, and a float 58 slidably arranged on the slide bar 57; the second sensor is used to output a second detection signal to the controller when the float 58 is detected. When the water inlet 52 is opened and the water level in the water storage tank body 5 begins to rise, the float 58 begins to slide upward under the action of buoyancy. When the float 58 rises to a predetermined water level, the second sensor detects the float 58, and the water sample collection is completed. The controller controls the drive motor 3 to turn off, and the sealing member blocks the water inlet 52. Another function of the float 58 and the second sensor is to monitor whether water enters the tank body in advance, which is also critical for sampling at precise depths and temperatures.

[0044] In the above embodiment, further, the water storage tank body 5 is made of transparent PVC material; the second sensor includes a transmitter 61 and a receiver 62 respectively arranged on both sides of the water storage tank body; the transmitter 61 is used to emit horizontal light 63; the receiver 62 is used to receive the horizontal light 63 emitted by the transmitter, and output a second detection signal to the controller when the horizontal light 63 cannot be received. The transmitter 61 and the receiver 62 are respectively installed on two opposite sides of the top of the water storage tank body 5, and are connected to the control handle 8 through a cable. After the power is turned on, the transmitter 61 emits a horizontal light 63 that passes through the transparent tank body and is received by the receiver 62. At this time, the photoelectric indicator 82 on the control handle 8 is always green. If the horizontal light 63 is blocked by the float 58 and the receiver 62 cannot receive the light, the photoelectric indicator 82 on the control handle 8 is always red. At this time, it indicates that the water level of the water sample has risen to the predetermined water level and the water sample collection is completed.

[0045] In order to seal the water inlet 52 tightly to prevent leakage, the sealing member is spherical and made of rubber; the diameter of the sealing member is larger than the inner diameter of the water inlet 52, and there is a rubber sealing ring on the outside of the water inlet 52. The sealing member can be a rubber ball 21. The steel wire rope 23 is connected to the wheel disc 31 of the driving motor 3, and the two ends of the rubber tube 24 are respectively connected to the two rubber balls 21. When there is no external force, the rubber tube 24 will drag the two rubber balls 21 in a direction close to each other, so that the two rubber balls 21 tightly seal the water inlets 52 on both sides.

[0046] Regarding the structure of the support frame 1, the support frame 1 includes a plurality of horizontal beams extending in the horizontal direction and a plurality of longitudinal beams extending in the vertical direction. The plurality of horizontal beams are welded to the longitudinal beams, and are all stainless steel pipes. The water sample storage structure is fixed to the first horizontal beam 12; the first rod body 221 is rotatably connected to the second horizontal beam 14. A clamp is welded on the first horizontal beam 12, and a clamp is welded on the second horizontal beam 14, and the clamp fixes the water storage tank body 5. The second horizontal beam 14 is provided with a fixing hole 16, and the first rod body 221 is fixed to the second horizontal beam 14 through the fixing hole 16, and serves as a movable fulcrum. There are two lifting rings 17 on the first horizontal beam 12, which can be connected with ropes. A counterweight 19 is installed at the bottom of the support frame 1.

[0047] In a specific implementation process, first connect the lifting ring 17 to the rope, and match the supporting frame 1 with an appropriate counterweight 19. Check the collection device to ensure that the water inlet 52 is in a closed state, that is, the two rubber balls 21 tightly seal the two water inlets 52 under the action of the rubber tube 24; ensure that the vent 51, the drain hole 55 and the sealing cover 56 are in a closed state. Put the collection device into the water, turn on the main power switch 83 on the control handle 8, the display screen 81 displays the real-time water depth and water temperature at the location of the collection device, and the photoelectric indicator 82 is always green. At this time, the water storage tank body 5 of the collection device is in a completely sealed state. Loosen the rope appropriately, the collection device sinks into the water under the action of gravity, and the display screen 81 shows the changes in the water depth and surrounding water temperature of the device. When the collection device reaches the predetermined sampling depth or water temperature layer, stop loosening the rope. After the water depth or water temperature on the display screen 81 is stable, long press the motor power button 84, and then the drive motor 3 starts to work, driving the wheel 31 to rotate half a circle, pulling the wire rope 23, driving the transmission rod to move, and pulling the two rubber balls 21 away from the water inlet 52. Water enters the channel 53 from the water inlet hole 54, and then enters the water storage tank body 5 through the water inlet 52. The air in the tank body is also discharged through the two water inlets 52. After the water enters the water storage tank body 5, the float 58 floats up. When the float 58 reaches the top position of the tank body, the sensing light of the photoelectric sensor 6 is cut off. At this time, the photoelectric indicator light 82 on the control handle 8 turns off green and lights up red, indicating that the tank body has been filled with water. At this time, release the motor power button 84, the drive motor 3 loses power, and the two rubber balls 21 are pulled back to the water inlet 52 under the elastic force of the rubber tube 24, so that the water inlet 52 is sealed. After the collection device is pulled back to the water surface, the vent hole 51 is opened at a suitable location, and then the water hole 55 is opened to transfer the water in the water storage tank body 5 to a suitable container for storage, thus completing a water sample sampling work of accurate depth or water temperature. When performing the second sampling, the sealing cover 56 can be opened to clean the inside to avoid water sample contamination. After the cleaning is completed, the second operation can be performed.

[0048] In summary, the present invention can seal the water inlet on the water storage tank body before and after water sample collection, so as to prevent water from non-water sample collection positions from entering the water storage tank body and causing pollution to the collected samples and the analysis and measurement results of the collected samples. At the same time, it can obtain information such as the water depth and water temperature of the water sample collection position in real time to ensure the accuracy of the water sample collection position, and can open the water inlet on the water storage tank body when the water sample collection position of the precise depth or precise water temperature is reached to collect the water sample of the layer, thereby improving the accuracy of the collected samples. The present invention realizes the collection of water samples at the layer of precise depth or precise water temperature and avoids the water sample from being polluted by water from water layers of different depths during the collection process, meeting the needs of the vertical distribution research of the physical and chemical indicators of lake water bodies.

[0049] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not limitations on the implementation methods of the present invention. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made on the basis of the above description. It is impossible to list all the implementation methods here. All obvious changes or modifications derived from the technical solution of the present invention are still within the protection scope of the present invention.

Claims

1. A water sample collection device, characterized in that: include: Support frame; A water sample storage structure disposed on the support frame, the water sample storage structure comprising a water inlet; A driving mechanism disposed on the supporting frame; A blocking member connected to the driving mechanism and used for blocking the water inlet; A controller; a first sensor disposed on the support frame and a second sensor disposed on the water sample storage structure; The first sensor is used to detect the water depth and temperature information at the location of the collection device and output it to the controller; the second sensor is used to output a detection signal to the controller when it detects that the water sample in the water sample storage structure reaches a predetermined water level; The controller is configured to send an opening signal to the driving mechanism based on the water depth and temperature information, or send a closing signal to the driving mechanism upon receiving a detection signal from the second sensor; The driving mechanism is configured to drive the blocking member to move away from the water inlet to open the water inlet when receiving the opening signal, or to drive the blocking member to move toward the water inlet to close the water inlet when receiving the closing signal.

2. The water sample collection device according to claim 1, characterized in that: The water sample storage structure includes a water storage tank body with a water inlet and a cylindrical structure formed around the water inlet of the water storage tank body; the cylindrical structure includes a channel connected to the water inlet of the water storage tank body; the blocking member can be slidably arranged in the channel and fits with the inner wall of the channel; a plurality of water inlet holes connected to the channel are formed on the circumferential side wall of the cylindrical structure.

3. The water sample collection device according to claim 2, characterized in that: The driving mechanism includes a driving motor fixed on a supporting frame, a wheel fixed to a rotating shaft of the driving motor, and a transmission rod rotatably arranged on the supporting frame; the driving motor is electrically connected to a controller; one end of the transmission rod is connected to a blocking member, and the other end is connected to the wheel through a connecting member.

4. The water sample collection device according to claim 3, characterized in that: The water storage tank body comprises two water inlets arranged opposite to each other, both water inlets are provided with a cylindrical structure, and both channels of the two cylindrical structures are provided with a blocking member; The driving mechanism comprises two connecting members which can be respectively wound on the same wheel disc and two transmission rods which are respectively connected to the two connecting members; the two transmission rods are respectively connected to the blocking members in the two cylindrical structures.

5. The water sample collection device according to claim 4, characterized in that: The driving mechanism also includes an elastic part located in the water storage tank body, and the two ends of the elastic part are respectively connected to two sealing parts; the driving motor is used to no longer provide the sealing part with the power required to avoid the water inlet and the water inlet hole when receiving the closing signal, and the two sealing parts are respectively pulled by the elastic part toward the water inlet to seal the water inlet.

6. The water sample collection device according to claim 3, characterized in that: The transmission rod includes a first rod body with one end connected to the wheel plate through a connecting piece and a second rod body rotatably connected to the other end of the first rod body; one end of the second rod body is rotatably connected to the first rod body, and the other end is fixed to the blocking piece; the middle section of the first rod body is rotatably connected to the support frame.

7. The water sample collection device according to claim 2, characterized in that: The water sample collection device also includes a vertically arranged slide bar arranged inside the water storage tank body, and a float ball slidably arranged on the slide bar; the second sensor is used to output a detection signal to the controller when the float ball is detected.

8. The water sample collection device according to claim 7, characterized in that: The water storage tank body is made of transparent material; the second sensor includes a transmitter and a receiver respectively arranged on both sides of the water storage tank body; the transmitter is used to emit horizontal light; the receiver is used to receive the horizontal light emitted by the transmitter, and outputs a detection signal to the controller when no horizontal light is received.

9. The water sample collection device according to claim 1, characterized in that: The blocking piece is spherical and made of rubber; the diameter of the blocking piece is larger than the inner diameter of the water inlet.

10. The water sample collection device according to claim 1, characterized in that: The driving mechanism, the first sensor and the second sensor are all electrically connected to the controller.

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