A water sampling device and sampling method

Abstract

A water sampling device and method, belonging to the field of liquid sampling technology, is disclosed. The water sampling device includes: a shell with a longitudinal structure, a closable door panel on one side of the shell, and through holes on all sides of the shell; a sampling assembly including a connecting frame inside the shell, on which multiple detachable sampling canisters are mounted, spaced longitudinally, with an opening at the top of each canister, and a cover plate rotatably mounted at the opening. The rotation axis of the cover plate is located at the edge of the opening of the sampling canister and is horizontal. An extension plate is provided outside the cover plate corresponding to the rotation axis, with its extension direction consistent with the radial direction of the cover plate and perpendicular to the rotation axis of the cover plate. A longitudinally movable lever is provided on one side inside the shell, with the end of the lever coinciding with the horizontal projection of the extension plate. This solution can collect water samples from different depths at once, which helps to improve sampling efficiency.

Description

Technical Field

[0001] This invention belongs to the field of liquid sampling technology, and particularly relates to a water sampling device and sampling method. Background Technology

[0002] In water environment monitoring and marine oil pollution monitoring, water sample collection is a crucial step in data acquisition and water quality analysis. Existing water sampling methods mainly include manual sampling, ship-assisted sampling, and fixed water sampling devices. Operators need to be directly close to the water body or travel by boat to collect samples, which presents problems such as high operational risks, low work efficiency, and susceptibility to water contamination. Especially in oil-contaminated water bodies or hazardous environments, the safety and operability of manual sampling are severely limited.

[0003] To ensure the accuracy of the samples, sampling is usually performed at different depths. Patent application number CN214584246U discloses a water sampling device that can adjust the extension size of the sampling device according to the sampling depth. However, when sampling water at different depths, it is necessary to perform sampling in batches and multiple times, which is quite troublesome. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a water sampling device and method that can collect water samples from different depths at a time, thereby improving sampling efficiency.

[0005] In order to achieve the objective of this invention, the following solution is proposed:

[0006] A water sampling device, comprising:

[0007] The outer shell has a longitudinal structure, with an openable and closable door panel on one side and through holes on all sides.

[0008] The sampling assembly includes a connecting frame located inside the housing, on which multiple detachable sampling canisters are provided. The sampling canisters are spaced longitudinally, with an opening at the top of each canister. A cover plate is rotatably provided at the opening, and the rotation axis of the cover plate is located at the edge of the opening of the sampling canister and is in a horizontal state. An extension plate is provided outside the cover plate corresponding to the rotation axis, and its extension direction is consistent with the radial direction of the cover plate and perpendicular to the rotation axis of the cover plate. A lever that moves longitudinally is provided on one side inside the housing, and the end of the lever that is opposite to the extension plate coincides in the horizontal projection.

[0009] The connecting frame includes a base plate and multiple columns vertically mounted on the top surface of the base plate. The outer side of the sampling tank has mounting holes corresponding to the columns, through which the columns pass. The columns are conical rod structures, with the outer diameter of the upper end smaller than that of the lower end. The diameter of the mounting holes increases from top to bottom of the sampling tank.

[0010] The water sampling method is implemented using the aforementioned water sampling device. After sampling is completed, the bottom cover is pushed up by a lever until the upper and lower adjacent sampling tanks come into contact with each other.

[0011] The beneficial effects of this invention are as follows:

[0012] 1. This scheme has multiple sampling tanks spaced longitudinally, and the cover plates of the sampling tanks are opened sequentially by a longitudinally moving lever, so that the water sampling device of this scheme can collect water samples at different depths in one immersion, effectively improving the sampling efficiency.

[0013] 2. Each sampling container is equipped with an individual cover, and the cover closes automatically after each sampling is completed, which effectively ensures the accuracy of the sample and prevents impurities from entering. Attached Figure Description

[0014] The accompanying drawings described herein are merely illustrative of selected embodiments, not all possible implementations, and are not intended to limit the scope of the invention.

[0015] Figure 1 A schematic diagram of one application state of the water sampling device of this application is shown.

[0016] Figure 2 A cross-sectional view of the water sampling device of this application is shown.

[0017] Figure 3 It shows Figure 2 A magnified view of a portion of point A in the middle.

[0018] Figure 4 A schematic diagram of the internal structure of the water sampling device of this application is shown.

[0019] Figure 5 It shows Figure 4 A magnified view of a section at point B.

[0020] The markings in the diagram are: outer casing-1, door panel-11, lead screw-12, guide rail-13, motor-14, connector-15, annular groove-151, lever-2, connecting frame-3, base plate-31, column-32, sampling tank-4, cover plate-41, extension plate-411, winch mechanism-5, quick release disc-6, insertion rod-61, compression spring-62. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the implementation methods of the present invention will be described in detail below with reference to the accompanying drawings. However, the embodiments described in this invention are only some embodiments of the present invention, and not all embodiments.

[0022] Example 1, such as Figure 2 , Figure 4 As shown, a water sampling device includes: a housing 1 and a sampling component.

[0023] Specifically, such as Figure 2 , Figure 4 As shown, the outer shell 1 is arranged in a longitudinal structure to facilitate water entry; one side of the outer shell 1 is provided with an openable and closable door panel 11, and through holes are provided on all sides of the outer shell 1 for liquid to flow through, so that water samples can enter the device.

[0024] Specifically, such as Figure 2 , Figure 4 and Figure 5 As shown, the sampling assembly includes a connecting frame 3 located inside the housing 1. Multiple detachable sampling canisters 4 are mounted on the connecting frame 3, spaced longitudinally. Each sampling canister 4 has an opening at its top, and a cover plate 41 is rotatably mounted at the opening. A rubber ring or sealing gasket at the bottom of the cover plate 41 effectively improves the sealing effect. The rotation axis of the cover plate 41 is located at the edge of the opening of the sampling canister 4 and is horizontal. An extension plate 411 is provided outside the cover plate 41 corresponding to the rotation axis. Its extension direction is consistent with the radial direction of the cover plate 41 and perpendicular to the rotation axis of the cover plate 41. The terms describing orientation, such as "longitudinal" and "horizontal," used above are defined in the context of the sampler in the sampling state. Inside the outer casing 1, there is a longitudinally movable lever 2 on one side. The end of the lever 2 that is opposite to the extension plate 411 coincides with the horizontal projection. Therefore, when the lever 2 moves downward, the end of the lever 2 can push the extension plate 411 to swing downward, thereby causing the cover plate 41 to swing upward around the rotation axis to open the opening of the sampling tank 4, so that the water can automatically flow into the sampling tank 4. When the lever 2 separates from the extension plate 411 during the downward movement, the cover plate 41 will automatically descend to close the opening of the sampling tank 4.

[0025] Preferably, a torsion spring can be provided on the rotation shaft of the cover plate 41 to apply pressure to the cover plate 41 to close the opening of the sampling can 4; as another option, the weight of the cover plate 41 can also be increased so that it automatically closes under the action of gravity.

[0026] Specifically, the lever 2 can be placed at the bottom of a rod with the upper end of the rod protruding above the water surface. The operator can move the rod longitudinally on the water surface to drive the lever 2 to move. Alternatively, a telescopic motor can be provided at the upper end of the outer casing 1 to drive the lever 2 to move. The telescopic motor is installed with a waterproof and sealed structure.

[0027] During sampling, the sampling device is placed in the water using a telescopic rod or cable. The immersion depth of the sampling device is controlled by adjusting the downward extension length of the telescopic rod or the release length of the cable. Once the predetermined depth is reached, the lever 2 is moved downward. Initially, lever 2 is positioned above the uppermost sampling tank 4. As lever 2 moves downward, it pushes the uppermost cover plate 41 to open, allowing water to automatically flow into the uppermost sampling tank 4. Then, lever 2 continues to descend, separating it from the extension plate 411, which in turn causes the cover plate 41 to close the opening of the sampling tank 4 again. This completes the collection of the first depth sample.

[0028] Then, the sampling device is raised or lowered to a predetermined depth, and the second depth sample is collected using the same method described above. This process is repeated to collect samples from multiple depths in sequence. This scheme allows the sampling device to complete sample collection from multiple depths in a single descent, avoiding repeated deployment and retrieval, thus effectively improving sampling efficiency. Furthermore, before and after sampling, the sampling tank 4 is sealed by the cover plate 41, effectively preventing water from adhering to the inside of the sampling tank 4 beyond the sampling depth and ensuring sample accuracy by preventing water sample mixing. This scheme places the sampling tank 4 inside the outer shell 1 with a through-hole, which not only meets the sampling requirements, allowing the sample to smoothly enter the outer shell 1 through the through-hole and then into the sampling tank 4, but also effectively reduces the risk of debris such as aquatic plants entering the sampling tank 4, preventing interference with the closing of the cover plate 41.

[0029] Preferably, the connecting frame 3 is detachably disposed inside the outer casing 1 to facilitate the disassembly and assembly of all sampling tanks 4 and to facilitate the removal of water samples from the sampling tanks 4; specifically, when the connecting frame 3 is disposed inside the outer casing 1, it can be fixed with screws.

[0030] Preferred, such as Figure 2 , Figure 4 and Figure 5 As shown, a longitudinally arranged lead screw 12 is provided on one side inside the housing 1, which passes through the lever 2 through a threaded structure. The inner wall of the housing 1 is provided with a guide rail 13 parallel to the lead screw 12. The outer end of the lever 2 is provided with a slot that slides with the guide rail 13 to prevent the lever 2 from rotating together with the lead screw 12. The upper end of the housing 1 is provided with a motor 14 that drives the lead screw 12 to rotate. Specifically, the motor 14 can be powered by ground power via a cable, or a battery can be sealed inside the housing 1 to power the motor 14.

[0031] Preferably, the water sampling device also includes a PCB main controller and a water pressure sensor located inside the housing 1. The PCB main controller is connected to the water pressure sensor and the motor 14. During sampling, the water pressure sensor is used to detect the water pressure to determine the diving depth of the water sampling device. After the diving depth reaches the set value of the internal program of the PCB main controller, the PCB main controller controls the motor 14 to rotate and controls the lowering position of the lever 2 by controlling the rotation time of the motor 14. The lever 2 opens the cover plate 41, and after a predetermined opening time, the motor 14 drives the lead screw 12 to rotate again, causing the lever 2 to continue to descend a predetermined distance. Then the water sampling device is raised or lowered. When the detection value of the water pressure sensor matches another set value again, the PCB main controller controls the motor 14 to rotate again and controls the lever 2 to descend again to perform sampling at a second depth position. By repeating the above process, sampling work for different water bodies can be completed.

[0032] Preferred, such as Figure 1 As shown, the outer casing 1 is connected to a cable of a winch mechanism 5, which is located at the bottom of the drone. In this solution, the drone is used to transfer the water sampling device to the water body above the sampling water body, and then the winch mechanism 5 is used to put the water sampling device into the water body, so that the water sampling device automatically submerges into the water for sampling under the action of gravity. This solution uses the drone to transfer the sampling device, which can effectively expand the sampling range, improve the convenience of sampling, and reduce the sampling risk in dangerous water areas. In addition, this solution can control the immersion depth of the sampling device through the winch mechanism 5 to achieve sampling work in water bodies at different depths.

[0033] Further preferred, such as Figure 3 , Figure 4 As shown, the top of the outer casing 1 is provided with a connector 15, and its outer periphery has an annular groove 151. The cable of the winch mechanism 5 is connected to a quick-release disc 6. The bottom of the quick-release disc 6 has a countersunk hole through which the connector 15 passes. A rod 61 passes through the side wall of the countersunk hole for connecting to the annular groove 151. When the front end of the rod 61 is inserted into the annular groove 151, the connector 15 is connected to the quick-release disc 6. When it is necessary to remove the water sampling device from the drone, it is only necessary to pull out the rod 61 to remove the front end of the rod 61 from the annular groove 151, so that the water sampling device can be quickly separated from the drone.

[0034] More specifically, such as Figure 3 As shown, a compression spring 62 is provided between the outer end of the insertion rod 61 and the outer wall of the quick-release plate 6 to apply pressure to the insertion rod 61 toward the inside of the countersunk hole, so that the front end of the insertion rod 61 can be pressed tightly in the annular groove 151 at all times to maintain the connection between the connector 15 and the quick-release plate 6.

[0035] Example 2: The connecting frame 3 of the water sampling device includes a base plate 31 and multiple columns 32 vertically arranged on the top surface of the base plate 31. The outer side of the sampling tank 4 is provided with mounting holes corresponding to the columns 32, and the columns 32 pass through the mounting holes.

[0036] Preferably, the sampling can 4 is equipped with a locking screw, the front end of which presses against the outer wall of the column 32, thereby fixing the sampling can 4 to the column 32, and the installation height of the sampling can 4 on the column 32 is adjustable. Preferably, the sampling can 4 can also be fixed to the column 32 using pins. As another preferred embodiment, spacer bushings can be fitted on the columns 32 between adjacent sampling can 4 to separate the sampling can 4, while the lowermost sampling can 4 is supported on the base plate 31.

[0037] In Example 3, based on Example 2, the water sampling device designs the column 32 as a conical rod structure, with the outer diameter of its upper end being smaller than that of its lower end. The diameter of the mounting holes of the sampling tanks 4 increases sequentially from top to bottom to match the different outer diameters of the column 32. This structure eliminates the need for pins, locking screws, or spacer bushings to fix the sampling tanks 4 at intervals on the column 32, and simplifies assembly and disassembly, allowing direct removal and installation from the top of the column 32. Furthermore, after water sampling is completed, moving the lever 2 to the bottom of the lowermost cover plate 41 and then moving the lever 2 upwards pushes the sampling tanks 4 upwards, causing adjacent sampling tanks 4 to overlap and contact each other, effectively preventing the cover plate 41 from opening. This helps ensure sample quality and prevents external water from contaminating the sample.

[0038] Example 4: A water sampling method is implemented using the water sampling device described in Example 3. After sampling is completed, the bottom cover plate 41 is pushed up by the lever 2 until all the adjacent sampling tanks 4 are in contact with each other.

[0039] The above description is merely a preferred embodiment of the present invention and is not intended to be the only or limiting of the invention. Those skilled in the art should understand that various changes or equivalent substitutions made to the present invention without departing from its scope are all within the protection scope of the present invention.

Claims

1. A water sampling device, characterized in that, include: The outer shell (1) is arranged in a longitudinal structure. One side of the outer shell (1) is provided with an openable and closable door panel (11). Through holes are provided on all sides of the outer shell (1). The sampling assembly includes a connecting frame (3) located inside the housing (1). The connecting frame (3) is provided with a plurality of detachable sampling canisters (4). The sampling canisters (4) are arranged longitudinally at intervals. The top of the sampling canister (4) is open. A cover plate (41) is rotatably provided at the opening. The rotation axis of the cover plate (41) is located at the edge of the opening of the sampling canister (4) and is in a horizontal state. An extension plate (411) is provided outside the cover plate (41) corresponding to the rotation axis. Its extension direction is consistent with the radial direction of the cover plate (41) and perpendicular to the rotation axis of the cover plate (41). A lever (2) that moves longitudinally is provided on one side inside the housing (1). The end of the lever (2) opposite to the extension plate (411) coincides in the horizontal projection. The connecting frame (3) includes a base plate (31) and multiple columns (32) vertically installed on the top surface of the base plate (31). The outer side of the sampling tank (4) is provided with mounting holes corresponding to the columns (32), and the columns (32) pass through the mounting holes. The column (32) is a conical rod structure, with the outer diameter of its upper end being smaller than that of its lower end. From top to bottom, the diameter of the mounting holes of each sampling tank (4) increases sequentially. After sampling is completed, use the lever (2) to push the bottom cover (41) up until the upper and lower adjacent sampling tanks (4) touch each other.

2. The water sampling device according to claim 1, characterized in that, The connecting bracket (3) is detachably located inside the outer casing (1).

3. The water sampling device according to claim 1, characterized in that, A longitudinally arranged lead screw (12) is provided on one side inside the outer casing (1), which passes through the lever block (2) through a threaded structure. The inner wall of the outer casing (1) is provided with a guide rail (13) parallel to the lead screw (12). The outer end of the lever block (2) is provided with a slot that slides with the guide rail (13). The upper end of the outer casing (1) is provided with a motor (14) that drives the lead screw (12) to rotate.

4. A water sampling device according to claim 3, characterized in that, It also includes a PCB main controller and a water pressure sensor located inside the housing (1), with the PCB main controller connected to the water pressure sensor and the motor (14).

5. A water sampling device according to claim 1, characterized in that, The outer shell (1) is connected to a cable of a winch mechanism (5), which is located at the bottom of the drone.

6. A water sampling device according to claim 5, characterized in that, The top of the outer casing (1) is provided with a connector (15), and its outer periphery has an annular groove (151). The cable of the winch mechanism (5) is connected to a quick-release plate (6). A countersunk hole through which the connector (15) passes is opened at the bottom of the quick-release plate (6). A plug rod (61) passes through the side wall of the countersunk hole for connecting the annular groove (151).

7. A water sampling device according to claim 6, characterized in that, A compression spring (62) is provided between the outer end of the insertion rod (61) and the outer wall of the quick-release disc (6) to apply pressure toward the inside of the countersunk hole to the insertion rod (61).

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