Automatic water body stratified sampling device and method

Abstract

The invention discloses an automatic water body stratified sampling device and method, and relates to the technical field of water body sampling, the automatic water body stratified sampling device comprises a plurality of sampling boxes, the sampling boxes are fixedly connected through connecting assemblies, partition plates are fixedly arranged in the sampling boxes, and sliding check blocks are arranged at the positions, corresponding to water inlet holes, of the inner sides of the sampling boxes in a matched mode; a water inlet channel is formed in the sliding check block, a water inlet pipe is arranged at the position, corresponding to one end of the water inlet channel, of the bottom end of the sliding check block in a communicating mode, a connecting pipe is fixedly arranged on the sampling box, and a sampling mechanism for conveniently driving the sliding check block to move is arranged in the connecting pipe. A plurality of limiting sliding rods are arranged at the bottom end of the sampling box, so that a plurality of sampling boxes are fixedly connected conveniently, and a sliding stop block moves in the length direction of a guide sliding groove under the action of a sliding plate, a push rod, a second rack, a gear and a first rack, so that water body sampling is automatically completed.

Description

Technical Field

[0001] The invention relates to the technical field of water body sampling, and in particular to an automatic water body stratified sampling device and method. Background Art

[0002] Water quality sampling is an important part of water quality monitoring, which requires accurate extraction of water samples at specific time and spatial locations. When sampling deep water, it is often necessary to sample multiple layers according to the depth gradient. At present, when performing stratified sampling, a water sampling container is generally lowered to a specified depth. The water sampling container is provided with a one-way openable and closable cover, which is opened during the lowering process and closed during the lifting process to achieve sampling. This sampling method can only take samples of one depth at a time. When performing stratified sampling, the container needs to be lowered for sampling multiple times, resulting in low sampling efficiency.

[0003] Chinese patent: CN115326491B discloses a stratified water sampler for water environment detection. The sampler is provided with a plurality of clips on a vertical tube, and each clip is provided with a water sampling container. The water sampling container is placed in water, and a handle is pulled to open a plurality of flaps at the same time, and the air pump is turned on at the same time, so as to perform sampling. However, when the above sampler is in use, the sampling depth is limited by the length of the vertical tube, so that it is not easy to sample deeper water bodies, and during the sampling process, the handle needs to be manually pulled to perform sampling, which makes it inconvenient to realize automatic sampling during sampling.

[0004] Based on this, an automated water stratification sampling device and method are now provided, which can eliminate the drawbacks of existing devices. Summary of the invention

[0005] The object of the present invention is to provide an automated water layer sampling device and method to solve the problem in the background art that it is inconvenient to sample deeper water bodies and to perform automatic sampling.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] 1. An automated water stratification sampling device, comprising a sampling box, a plurality of sampling boxes being fixedly connected by a connecting assembly, a hanging ring being fixedly provided on the upper end of the sampling box, a partition being fixedly provided inside the sampling box, a bottom end of the partition and the bottom end of the sampling box being combined into a water storage chamber, a drainage pipe being connected to one side of the bottom end of the sampling box, an electromagnetic valve being provided on the drainage pipe, a water inlet hole being provided on one side of the sampling box, a sliding block being provided at a position corresponding to the position of the water inlet hole on the inner side of the sampling box, one side of the sliding block being tightly attached to the inner side of the sampling box, guide groove rods being slidably provided on guide rods on both sides of the sliding block, the guide groove rods being fixedly provided on the inner side of the sampling box, a water inlet channel being provided inside the sliding block, a water inlet pipe being connected to a position corresponding to one end of the water inlet channel, the water inlet pipe being slidably provided in the circular through-hole at the upper end of the partition, a connecting pipe being fixedly provided on the sampling box, a sampling mechanism being provided inside the connecting pipe for facilitating the movement of the sliding block.

[0008] On the basis of the above technical solution, the present invention also provides the following optional technical solution:

[0009] In an optional scheme: the connecting component includes a fixing frame, the upper end of the sampling box is symmetrically provided with a fixing frame, the fixing frame is U-shaped, the upper inner end of the fixing frame is symmetrically provided with a limiting slide bar, the limiting slide bar is slidably arranged in a rectangular through-hole on one side of a fixed tube, the fixed tube is fixed at the bottom end of the sampling box, the bottom end of the limiting slide bar is fixedly provided with a mounting plate, and a reset spring is fixedly provided between one side of the mounting plate and one side inside the fixed tube.

[0010] In an optional solution: the two limit sliding rods on the same side are both arranged on a connecting frame.

[0011] In an optional scheme: the sampling mechanism includes a first rack, the first rack is fixedly arranged on one side of the sliding stopper, the first rack is cooperated with a gear, the rotating shafts at both ends of the gear are rotatably arranged in the mounting groove inside the sampling box, the gear is cooperated with a second rack, the second rack is fixedly arranged on the upper end of the push rod, one end of the push rod is fixedly provided with a sliding plate, the sliding plate is slidably arranged inside the connecting pipe, one end of the sliding plate is fixedly connected to one end of the adjusting spring, the other end of the adjusting spring is fixedly connected to one side of the adjusting plate, the adjusting plate is slidably arranged inside the connecting pipe, a threaded rod is cooperated with in the threaded hole on one side of the adjusting plate, one end of the threaded rod is provided with an external thread, one end of the threaded rod is rotatably arranged in the mounting groove on one side of the sampling box, an exhaust pipe is connected to the inside of the water storage chamber, and a one-way valve is cooperated on the exhaust pipe.

[0012] In an optional solution: a ruler is fixedly provided on one side of the adjustment plate, and a plurality of scale values ​​are provided on the ruler.

[0013] In an optional scheme: a floating block is provided inside the sampling box, and the floating block is fixed at one end of a sliding column. A sliding support plate is slidably provided on the sliding column, and the sliding support plate is fixed on the inside of the sampling box. A push plate is fixed at the other end of the sliding column. A mounting hole is provided at the upper end of the partition plate corresponding to the position of the push plate, and a button pressure sensor is fixed in the mounting hole.

[0014] In an optional solution: a filter plate is fixedly provided inside the water inlet hole of the sampling box.

[0015] In an optional solution: a counterweight block is provided at the bottom end of the sampling box at the lowermost side, and a fixing frame is symmetrically provided at the upper end of the counterweight block.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The present invention symmetrically arranges a fixing frame at the upper end of the sampling box and arranges a plurality of limiting sliding rods at the bottom end of the sampling box, thereby facilitating the fixed connection of the plurality of sampling boxes, facilitating the increase or decrease of the number of sampling boxes according to the use requirements, thereby increasing the practicality of the water body stratification sampling device, and slidably arranges a sliding block inside the sampling box, wherein a water inlet channel is arranged inside the sliding block, and the sliding block is moved along the length direction of the guide slide groove under the action of the sliding plate, the push rod, the second rack, the gear and the first rack, so that the water body sampling is automatically completed, and when the water body pressure exceeds the set elastic force of the connecting pipe, the water inlet channel exceeds the water inlet hole, thereby preventing the water body from continuing to enter the water storage chamber, and by arranging the threaded rod and the adjusting plate, it is convenient to adjust the elastic force of the adjusting spring when sampling water bodies at different depths, and by arranging the floating block and the button pressure sensor, it is convenient to remind the staff that the sampling inside the water storage chamber is completed, thereby facilitating the actual use of the water body stratification sampling device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the present invention.

[0019] Figure 2 This is a schematic diagram of the installation of the one-way valve of the present invention.

[0020] Figure 3 This is a schematic diagram of the internal structure of the sampling box of the present invention.

[0021] Figure 4 It is a schematic diagram of the structure of the sliding stopper of the present invention.

[0022] Figure 5 It is a schematic diagram of the internal structure of the connecting pipe of the present invention.

[0023] Figure 6 It is a schematic diagram of the structure of the limiting sliding rod of the present invention.

[0024] Notes on figure numbers: 11 sampling box, 12 sliding block, 13 water inlet pipe, 14 exhaust pipe, 15 one-way valve, 16 filter plate, 17 drain pipe, 18 solenoid valve, 19 first rack, 20 gear, 21 second rack, 22 push rod, 23 sliding plate, 24 connecting pipe, 25 threaded rod, 26 adjustment plate, 27 adjustment spring, 28 scale, 29 float, 30 button pressure sensor, 31 fixing frame, 32 limit slide rod, 33 connecting frame, 34 reset spring, 35 counterweight, 36 lifting ring. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0026] Example 1

[0027] In one embodiment, Figure 1-Figure 6 As shown, an automatic water layered sampling device includes a sampling box 11, a plurality of the sampling boxes 11 are fixedly connected by a connecting assembly, a lifting ring 36 is fixedly provided on the upper end of each sampling box 11, a partition is fixedly provided inside the sampling box 11, the bottom end of the partition and the bottom end of the sampling box 11 are combined into a water storage chamber, a drainage pipe 17 is connected to one side of the bottom end of the sampling box 11, an electromagnetic valve 18 is provided on the drainage pipe 17, a water inlet hole is provided on one side of the sampling box 11, a sliding block 12 is provided on the inner side of the sampling box 11 corresponding to the position of the water inlet hole, and one side of the sliding block 12 is connected to the sampling box 11 is tightly attached to the inner side, guide groove rods are slidably provided on the guide rods on both sides of the sliding block 12, and the guide groove rods are fixedly arranged on the inner side of the sampling box 11. A water inlet channel is arranged inside the sliding block 12, and a water inlet pipe 13 is connected to the corresponding position of the bottom end of the sliding block 12 and one end of the water inlet channel. The water inlet pipe 13 is slidably arranged in the circular perforation at the upper end of the partition, and a connecting pipe 24 is fixed on the sampling box 11. A sampling mechanism is arranged inside the connecting pipe 24 to facilitate the movement of the sliding block 12. The sliding block 12 is conveniently driven to move by the sampling mechanism, so that one end of the water inlet channel coincides with the water inlet hole;

[0028] The connecting assembly includes a fixing frame 31, and the upper end of the sampling box 11 is symmetrically provided with a fixing frame 31, and the fixing frame 31 is set in a U shape. The upper end of the inner side of the fixing frame 31 is symmetrically provided with a limit slide bar 32, and the limit slide bar 32 is slidably set in a rectangular perforation on one side of the fixed tube. The fixed tube is fixed at the bottom end of the sampling box 11, and a mounting plate is fixed at the bottom end of the limit slide bar 32. A reset spring 34 is fixed between one side of the mounting plate and one side inside the fixed tube. When in use, when it is necessary to connect several sampling boxes 11 together, , align the limiting slide bar 32 at the bottom end of one sampling box 11 with the fixing frame 31 at the top end of the other sampling box 11, and then make one end of the limiting slide bar 32 close to the upper end of the fixing frame 31, and the bottom end of one end of the limiting slide bar 32 is set in an arc shape, so that one end of the limiting slide bar 32 slides inside the box fixing tube, and when one end of the limiting slide bar 32 is separated from one side of the fixing frame 31, under the action of the return spring 34, the limiting slide bar 32 slides to the initial position, and at the same time, the upper end of the limiting slide bar 32 is close to the inner upper end of the fixing frame 31, so that the two sampling boxes 11 are fixedly connected.

[0029] The two limiting slide bars 32 on the same side are both arranged on a connecting frame 33. During use, when the sampling box 11 needs to be disassembled, the two connecting frames 33 are pulled so that several limiting slide bars 32 are simultaneously separated from the inner upper end of the fixing frame 31, thereby removing the sampling box 11.

[0030] The sampling mechanism includes a first rack 19, which is fixedly arranged on one side of the sliding block 12. A gear 20 is provided on the first rack 19. The rotating shafts at both ends of the gear 20 are rotatably arranged in the mounting groove inside the sampling box 11. A second rack 21 is provided on the gear 20. The second rack 21 is fixedly arranged on the upper end of the push rod 22. A sliding plate 23 is fixedly arranged at one end of the push rod 22. The sliding plate 23 is slidably arranged inside the connecting pipe 24. One end of the sliding plate 23 is fixedly connected to one end of the adjusting spring 27. The adjusting spring 2 The other end of the adjusting plate 26 is fixedly connected to one side of the adjusting plate 26, and the adjusting plate 26 is slidably arranged inside the connecting pipe 24. A threaded rod 25 is matched in the threaded hole on one side of the adjusting plate 26, and one end of the threaded rod 25 is provided with an external thread. One end of the threaded rod 25 is rotatably arranged in the mounting groove on one side of the sampling box 11. An exhaust pipe 14 is connected to the inside of the water storage chamber, and a one-way valve 15 is matched on the exhaust pipe 14. When in use, when it is necessary to sample the water body in layers, the upper end ring 36 of the sampling box 11 at the top is connected to the external traction equipment, and then the sampling box 11 is adjusted according to the sampling depth. The threaded rod 25 is rotated, and the threaded rod 25 and the adjusting plate 26 are acted upon by the thread, so that the adjusting plate 26 moves along the axial direction of the threaded rod 25, thereby adjusting the elastic force of the adjusting spring 27. Subsequently, a plurality of sampling boxes 11 are slowly placed into the water through an external traction device. When the placement depth reaches a set distance of a sampling box 11, the sliding plate 23 slides inside the connecting pipe 24 under the action of the water pressure. The sliding plate 23 pushes the second rack 21 to move through the push rod 22, and the second rack 21 meshes with the gear 20, so that the gear 20 Rotate, the gear 20 and the first rack 19 mesh with each other, so that the first rack 19 drives the sliding block 12 to move along the length direction of the guide groove rod. When one end of the water inlet channel coincides with the water inlet hole, the sliding plate 23 stops moving, and water enters the water storage chamber through the water inlet pipe 13. At the same time, the gas in the water storage chamber is discharged through the exhaust pipe 14. When the sampling box 11 continues to sink, the water pressure increases, and the sliding plate 23 continues to move, so that one end of the water inlet channel exceeds the position of the water inlet hole, and the sliding block 12 closes the water inlet hole, thereby preventing water at other depths from entering the water storage chamber.

[0031] A ruler 28 is fixedly provided on one side of the adjustment plate 26, and a plurality of scale values ​​are provided on the ruler 28. When in use, it is convenient to adjust the elastic force of the adjustment spring 27 by the moving distance of the ruler 28, and the moving distance of the adjustment plate 26 can be confirmed by the scale value.

[0032] The sampling box 11 is equipped with a float 29 inside. The float 29 is fixed at one end of a sliding column. A sliding support plate is slidably provided on the sliding column. The sliding support plate is fixed on the inner side of the sampling box 11. A push plate is fixed at the other end of the sliding column. A mounting hole is provided at the upper end of the partition corresponding to the position of the push plate. A button pressure sensor 30 is fixed in the mounting hole. When in use, when the water level inside the water storage chamber rises, the float 29 floats on the water surface inside the water storage chamber. When the water level inside the water storage chamber reaches the set height, the float 29 squeezes the button pressure sensor 30 through the sliding column and the push plate. The output end of the button pressure sensor 30 is electrically connected to the external control component, so that the staff can understand the liquid level inside the water storage chamber.

[0033] A filter plate 16 is fixedly provided inside the water inlet hole of the sampling box 11, which is convenient for reducing impurities from entering the water storage chamber when sampling water.

[0034] Example 2

[0035] The difference from Example 1 is that a counterweight block 35 is provided at the bottom end of the sampling box 11 at the lowermost side, and a fixing frame 31 is symmetrically provided on the upper end of the counterweight block 35. When in use, the counterweight block 35 is installed to the bottom end of the sampling box 11 at the bottom, and the fixing frame 31 is fixed by a plurality of limiting slide bars 32 at the bottom end of the sampling box 11, thereby fixing the counterweight block 35, which is convenient for increasing the total amount of the sampling box 11 when sampling.

[0036] The above embodiment discloses an automated stratified water sampling device, wherein, when stratified sampling of the water body is required, the limiting slide bar 32 at the bottom end of one sampling box 11 is aligned with the fixing frame 31 at the upper end of another sampling box 11, and then one end of the limiting slide bar 32 is tightly attached to the upper end of the fixing frame 31, and the bottom end of one end of the limiting slide bar 32 is arranged in an arc shape, so that one end of the limiting slide bar 32 slides inside the box fixing tube, and when one end of the limiting slide bar 32 is separated from one side of the fixing frame 31, under the action of the return spring 34, the limiting slide bar 32 slides to the initial position, and at the same time, the upper end of the limiting slide bar 32 is tightly attached to the inner upper end of the fixing frame 31, so that the two sampling boxes 11 are fixedly connected, and this method is repeated so that several sampling boxes 11 are connected. Together, the counterweight 35 is then installed to the bottom of the sampling box 11 at the bottom, and the fixing frame 31 is fixed by a plurality of limit slide bars 32 at the bottom of the sampling box 11, so that the counterweight 35 is fixed, and the upper end ring 36 of the sampling box 11 at the top is connected to the external traction equipment, and then according to the different sampling depths, the threaded rod 25 is rotated, and the threaded rod 25 and the adjustment plate 26 are acted on by the thread, so that the adjustment plate 26 moves along the axis direction of the threaded rod 25, thereby adjusting the elastic force of the adjustment spring 27, and then the plurality of sampling boxes 11 are slowly dropped into the water through the external traction equipment. When the dropping depth reaches the set distance of a sampling box 11, the sliding plate 23 is moved under the action of the water pressure. Sliding inside the connecting pipe 24, the sliding plate 23 pushes the second rack 21 to move through the push rod 22, the second rack 21 meshes with the gear 20, so that the gear 20 rotates, the gear 20 meshes with the first rack 19, so that the first rack 19 drives the sliding block 12 to move along the length direction of the guide groove rod, when one end of the water inlet channel coincides with the water inlet hole, the sliding plate 23 stops moving, water enters the water storage chamber through the water inlet pipe 13, and the gas in the water storage chamber is discharged through the exhaust pipe 14. When the water level inside the water storage chamber rises, the float 29 floats on the water surface inside the water storage chamber. When the water level inside the water storage chamber reaches the set height, the float 29 squeezes the button pressure sensor 30 through the sliding column and the push plate. The output end of the button pressure sensor 30 is electrically connected to the external control component to remind the staff that the water sample collection inside the water storage chamber is completed. Then the external traction equipment continues to increase the depth of the sampling box 11. When the sampling box 11 continues to sink, the water pressure increases, and the sliding plate 23 continues to move, so that one end of the water inlet channel exceeds the position of the water inlet hole. The sliding block 12 closes the water inlet hole to prevent water from the remaining depth from entering the water storage chamber. After sampling is completed, the sampling box 11 is taken out of the water, and then the two connecting frames 33 are pulled so that several limit slide bars 32 are simultaneously separated from the inner upper end of the fixed frame 31, thereby removing the sampling box 11 and opening the electromagnetic valve 18 to discharge the water sample inside the water storage chamber.

[0037] The above is only a specific implementation of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any person skilled in the art who is familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present disclosure, which should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. An automated water layered sampling device, comprising a sampling box (11), wherein a plurality of the sampling boxes (11) are fixedly connected via a connecting assembly, wherein a hanging ring (36) is fixedly provided at the upper end of each of the sampling boxes (11), wherein: A partition is fixedly provided inside the sampling box (11), and the bottom end of the partition is combined with the bottom end of the sampling box (11) to form a water storage chamber. A drainage pipe (17) is connected to one side of the bottom end of the sampling box (11), and an electromagnetic valve (18) is provided on the drainage pipe (17). A water inlet is provided on one side of the sampling box (11), and a sliding block (12) is provided on the inner side of the sampling box (11) at a position corresponding to the water inlet. One side of the sliding block (12) is in close contact with the inner side of the sampling box (11). (12) Guide groove rods are slidably provided on the guide rods on both sides, and the guide groove rods are fixedly arranged on the inner side of the sampling box (11). A water inlet channel is arranged inside the sliding block (12). A water inlet pipe (13) is arranged at a position corresponding to the bottom end of the sliding block (12) and one end of the water inlet channel. The water inlet pipe (13) is slidably arranged in a circular through hole at the upper end of the partition. A connecting pipe (24) is fixedly arranged on the sampling box (11), and a sampling mechanism is arranged inside the connecting pipe (24) for driving the sliding block (12) to move.

2. The automatic water layer sampling device according to claim 1, characterized in that: The connecting assembly comprises a fixing frame (31), the upper end of the sampling box (11) is symmetrically provided with a fixing frame (31), the fixing frame (31) is arranged in a U shape, the inner upper end of the fixing frame (31) is symmetrically provided with a limiting slide bar (32), the limiting slide bar (32) is slidably arranged in a rectangular through hole on one side of a fixing tube, the fixing tube is fixedly arranged at the bottom end of the sampling box (11), a mounting plate is fixedly arranged at the bottom end of the limiting slide bar (32), and a reset spring (34) is fixedly arranged between one side of the mounting plate and one side inside the fixing tube.

3. The automatic water layer sampling device according to claim 2, characterized in that: The two limiting sliding rods (32) on the same side are both arranged on a connecting frame (33).

4. The automatic water layer sampling device according to claim 1, characterized in that: The sampling mechanism comprises a first rack (19), the first rack (19) is fixedly arranged on one side of the sliding stopper (12), a gear (20) is matched with the first rack (19), the rotating shafts at both ends of the gear (20) are rotatably arranged in the mounting groove inside the sampling box (11), a second rack (21) is matched with the gear (20), the second rack (21) is fixedly arranged on the upper end of the push rod (22), a sliding plate (23) is fixedly arranged at one end of the push rod (22), the sliding plate (23) is slidably arranged inside the connecting pipe (24), and the sliding plate (23) is slidably arranged inside the connecting pipe (24). One end of the plate (23) is fixedly connected to one end of the adjusting spring (27), and the other end of the adjusting spring (27) is fixedly connected to one side of the adjusting plate (26). The adjusting plate (26) is slidably arranged inside the connecting pipe (24). A threaded rod (25) is matched in a threaded hole on one side of the adjusting plate (26). One end of the threaded rod (25) is provided with an external thread. One end of the threaded rod (25) is rotatably arranged in a mounting groove on one side of the sampling box (11). An exhaust pipe (14) is connected to the inside of the water storage chamber, and a one-way valve (15) is matched on the exhaust pipe (14).

5. The automatic water layer sampling device according to claim 4, characterized in that: A scale (28) is fixedly provided on one side of the adjustment plate (26), and a plurality of scale values ​​are provided on the scale (28).

6. The automatic water layer sampling device according to claim 1, characterized in that: The sampling box (11) is provided with a floating block (29) inside, and the floating block (29) is fixedly arranged at one end of a sliding column, and a sliding support plate is slidably arranged on the sliding column, and the sliding support plate is fixedly arranged on the inner side of the sampling box (11), and a push plate is fixedly arranged at the other end of the sliding column, and a mounting hole is provided at the upper end of the partition plate corresponding to the position of the push plate, and a button pressure sensor (30) is fixedly arranged in the mounting hole.

7. The automatic water layer sampling device according to claim 1, characterized in that: A filter plate (16) is fixedly provided inside the water inlet hole of the sampling box (11).

8. The automatic water layer sampling device according to claim 1, characterized in that: The bottom end of the sampling box (11) at the lowermost side is provided with a counterweight block (35), and the upper end of the counterweight block (35) is symmetrically provided with a fixing frame (31).

9. A method for using the automatic water layer sampling device according to any one of claims 1 to 8, characterized in that: The steps include: Step 1: Connect several sampling boxes (11) together by cooperating a fixed frame (31) at the upper end of a sampling box with several limit slide bars (32) at the bottom end of another sampling box (11), install a counterweight (35) at the bottom end of the sampling box (11), and connect the upper end lifting ring (36) of the sampling box (11) at the top end to an external traction device; Step 2, rotate the threaded rod (25) to adjust the elastic force of the adjustment spring (27), slowly put a number of sampling boxes (11) into the water, and when the depth reaches the set distance of one sampling box (11), the sliding plate (23) slides inside the connecting pipe (24) under the action of water pressure, and the sliding plate (23) pushes the second rack (21) to move through the push rod (22). Under the cooperation of the second rack (21), the gear (20) and the first rack (19), when one end of the water inlet channel coincides with the water inlet hole, water enters the water storage chamber through the water inlet pipe (13), and at the same time, the gas in the water storage chamber is discharged through the exhaust pipe (14). After the sampling is completed, the floating block (29) squeezes the button pressure sensor (30) through the sliding column and the push plate; Step 3: After sampling is completed, the sampling box (11) is taken out of the water, and then the two connecting frames (33) are pulled so that a plurality of limit slide bars (32) are simultaneously separated from the inner upper end of the fixing frame (31), thereby removing the sampling box (11) and opening the electromagnetic valve (18) to discharge the water sample inside the water storage chamber.

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