A water quality stratified sampling and sample preparation device

Abstract

The present invention discloses a water quality stratified sampling and sample preparation device, which relates to the technical field of water quality sampling, including a connecting rod and a sampling tank, wherein the sampling tank is arranged below the connecting rod, and the sampling tank performs sampling operation through a sampling mechanism, and also includes a connecting mechanism and a discharging mechanism. The present invention sets a sampling mechanism, and when sampling is performed, multiple sampling tanks are sequentially installed below the connecting rod, and the sampling tank is placed in water. When the sampling tank moves to a suitable depth, the motor drives the movable plate to move upward, and the external water enters the sampling tank through the sampling port for collection operation, until the movable plate moves to the top of the inner wall of the sampling tank, at which time the first rotating plate is displaced to block the sampling port, so as to facilitate simultaneous sampling of water at different depths, and different numbers of sampling tanks can be changed according to different sampling depths for sampling operation, thereby performing stratified sampling and analysis of the water area.

Description

Technical Field

[0001] The invention relates to the technical field of water quality sampling, in particular to a water quality stratified sampling and sample preparation device. Background Art

[0002] Water quality is the abbreviation of water quality, which indicates the physical (such as color, turbidity, odor, etc.), chemical (inorganic and organic content) and biological (bacteria, microorganisms, plankton, benthic organisms) characteristics of water and its composition. Collect water samples from polluted water bodies and analyze and measure them to obtain basic data on water pollution. The water samples used for analysis should be representative and reflect the chemical composition and characteristics of the water body. The sampling method, location, time, number of times, etc. are all determined according to the characteristics of the water body and the purpose of analysis.

[0003] However, when sampling water quality, it is usually necessary to sample different depths at one location, which requires multiple samplings, which is inefficient and labor-intensive. In order to facilitate stratified water sampling, a water quality stratified sampling and sample preparation device is provided. Summary of the invention

[0004] The purpose of the present invention is to provide a water quality stratified sampling and sample preparation device in order to facilitate stratified sampling of water.

[0005] To achieve the above object, the present invention provides the following technical solutions: a water quality stratified sampling and preparation device, comprising a connecting rod and a sampling tank, wherein the sampling tank is arranged below the connecting rod, the sampling tank performs sampling operation through a sampling mechanism, the connecting rod and the sampling tank and the two sampling tanks are connected through a connecting mechanism, and the water sample obtained in the sampling tank is discharged through a discharging mechanism;

[0006] The sampling mechanism includes a motor, which is installed on the top of the connecting rod, and the output end of the motor is connected to a connecting shaft. The interior of the sampling tank is rotatably connected to a first threaded rod, and the outer wall of the first threaded rod is connected to a movable plate, and the movable plate is slidably connected to the inner cavity of the sampling tank. A water outlet is provided at the top of the sampling tank, and a sampling port is provided on one side of the outer wall of the sampling tank. The interior of the sampling tank is slidably connected to an extrusion rod extending to the inner cavity of the sampling tank, and the interior of the sampling tank is located on the outer wall of the extrusion rod and is rotatably connected to a first spur gear, and the interior of the sampling tank is located on the outer wall of the first spur gear and is slidably connected to a pressing rod, and the bottom end of the pressing rod is fixedly connected to a displacement plate, a first spring is connected between the displacement plate and the sampling tank, and the bottom end of the displacement plate is rotatably connected to the first rotating plate.

[0007] As a further solution of the present invention: the connecting mechanism includes a lower connecting seat and an upper connecting seat, the lower connecting seat is fixedly connected to the bottom end of the connecting rod and the sampling tank, the upper connecting seat is fixedly connected to the top end of the sampling tank, the bottom end of the first threaded rod is fixedly connected to a docking plate, the bottom end of the docking plate is provided with a plug hole, the top end of the first threaded rod is fixedly connected to a ratchet, the top end of the ratchet is fixedly connected to a plug rod, the bottom end of the lower connecting seat is fixedly connected to a mounting block, the interior of the mounting block is slidably connected to a fixed block extending from the mounting block, a second spring is connected between the fixed block and the mounting block, and the top end of the fixed block is fixedly connected to a vertical The outer wall of the lower connecting seat is rotatably connected to a rotating column, and the bottom end of the rotating column is fixedly connected to a second threaded rod, the interior of the mounting block is located above the fixed block and is slidably connected to a positioning rod, the second threaded rod extends to the interior of the positioning rod, a mounting groove is provided at the top of the upper connecting seat, the interior of the upper connecting seat is located on one side of the ratchet and is slidably connected to a clamping block, a third spring is connected between the clamping block and the upper connecting seat, the interior of the upper connecting seat is located at the bottom end of the clamping block and is rotatably connected to a second spur gear, the interior of the upper connecting seat is located at the bottom end of the second spur gear and is slidably connected to a displacement block, and the displacement block extends to the inner cavity of the mounting groove.

[0008] As a further solution of the present invention: the discharging mechanism includes a groove, the groove is opened at the bottom end of the inner wall of the sampling port, the outer wall of the sampling tank is located on one side of the groove and is rotatably connected to a second rotating plate, the outer wall of the second rotating plate is opened with a through hole, the sampling tank and the through hole are connected with a mounting hole, and the inner wall of the mounting hole is threadedly connected with a bolt.

[0009] As a further solution of the present invention: the outer wall of the movable plate is fitted with the inner wall of the sampling tank, and a first threaded hole is formed on the outer wall of the movable plate, and the first threaded hole matches the first threaded rod.

[0010] As a further solution of the present invention: the outer walls of the extrusion rod and the pressing rod are both provided with a first tooth groove, and the first tooth groove is meshed with the first spur gear.

[0011] As a further solution of the present invention: the inner wall of the insertion hole is in contact with the outer wall of the insertion rod.

[0012] As a further solution of the present invention: the outer wall of the mounting block is in contact with the inner wall of the mounting groove, and one end of the fixing block extending out of the mounting block is provided with a first inclined surface.

[0013] As a further solution of the present invention: a second threaded hole is formed at the top end of the positioning rod, and the second threaded hole matches the second threaded rod.

[0014] As a further solution of the present invention: one end of the clamping block is engaged with the ratchet, the outer walls of the clamping block and the displacement block are provided with a second tooth groove, the second tooth groove is meshed with the second spur gear, and one end of the displacement block extending to the inner cavity of the installation groove is provided with a second inclined surface.

[0015] As a further solution of the present invention: the inner wall of the groove fits with the outer wall of the first rotating plate, and the inner wall of the through hole matches with the outer wall of the screw rod of the bolt.

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

[0017] 1. By setting up a sampling mechanism, when sampling, multiple sampling tanks are installed in sequence under the connecting rod, and the sampling tanks are placed in water. When the sampling tanks move to a suitable depth, the motor drives the movable plate to move upward, and the external water enters the sampling tank through the sampling port for collection until the movable plate moves to the top of the inner wall of the sampling tank. At this time, the first rotating plate moves to block the sampling port, which is convenient for synchronous sampling of water at different depths. According to different sampling depths, different numbers of sampling tanks can be changed for sampling operations, so as to perform layered sampling and analysis of the water area.

[0018] 2. By setting up a connecting mechanism, the lower connecting seat is fitted with the upper connecting seat, and the mounting block is inserted into the mounting groove until the lower end of the fixed block moves out of the mounting groove. The fixed block is displaced out of the mounting block under the elastic force of the second spring and contacts the bottom outer wall of the upper connecting seat, thereby performing a fixing operation between the lower connecting seat and the upper connecting seat. After that, the rotating column is rotated to drive the positioning rod to move. The positioning rod moves and contacts the vertical plate to prevent the vertical plate from moving, thereby reinforcing the fixed block, which is convenient for rapid installation and disassembly of the sampling tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the present invention;

[0020] Figure 2 It is a schematic diagram of the internal structure of the connecting rod of the present invention;

[0021] Figure 3 It is a schematic diagram of the internal structure of the sampling tank of the present invention;

[0022] Figure 4 It is a schematic diagram of the installation of the movable plate of the present invention;

[0023] Figure 5 It is a schematic diagram of the installation of the first rotating plate and the second rotating plate of the present invention;

[0024] Figure 6It is a schematic diagram of the internal structure of the lower connecting seat of the present invention;

[0025] Figure 7 It is a schematic diagram of the internal structure of the upper connecting seat of the present invention.

[0026] In the figure: 1, connecting rod; 2, sampling tank; 3, sampling mechanism; 301, motor; 302, connecting shaft; 303, first threaded rod; 304, movable plate; 305, water outlet; 306, sampling port; 307, extrusion rod; 308, first straight gear; 309, pressing rod; 310, displacement plate; 311, first spring; 312, first rotating plate; 4, discharging mechanism; 401, groove; 402, second rotating plate; 403, through hole; 404, mounting hole ; 405, bolt; 5, connecting mechanism; 501, lower connecting seat; 502, upper connecting seat; 503, docking plate; 504, socket; 505, ratchet; 506, plug rod; 507, mounting block; 508, fixing block; 509, second spring; 510, vertical plate; 511, rotating column; 512, second threaded rod; 513, positioning rod; 514, mounting groove; 515, block; 516, third spring; 517, second spur gear; 518, displacement block. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal connection of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The following is an explanation of an embodiment of the present invention based on the overall structure of the present invention.

[0029] See also Figures 1 to 7 In an embodiment of the present invention, a water quality stratified sampling and sample preparation device comprises a connecting rod 1 and a sampling tank 2, wherein the sampling tank 2 is arranged below the connecting rod 1, and the sampling tank 2 performs sampling operation through a sampling mechanism 3, and the connecting rod 1 and the sampling tank 2 and the two sampling tanks 2 are connected through a connecting mechanism 5, and the water sample obtained in the sampling tank 2 is discharged through a discharging mechanism 4, and the sampling mechanism 3 comprises a motor 301, and the motor 301 is installed at the top of the connecting rod 1, and the output end of the motor 301 is connected to a connecting shaft 302, and the interior of the sampling tank 2 is rotatably connected to a first threaded rod 303, and the outer wall of the first threaded rod 303 is connected to a movable plate 304, and the movable plate 304 is connected to the outer wall of the first threaded rod 303. The movable plate 304 is slidably connected to the inner cavity of the sampling tank 2, a water outlet 305 is provided at the top of the sampling tank 2, a sampling port 306 is provided on the outer wall of one side of the sampling tank 2, an extrusion rod 307 extending to the inner cavity of the sampling tank 2 is slidably connected inside the sampling tank 2, the outer wall of the extrusion rod 307 inside the sampling tank 2 is rotatably connected to the first straight gear 308, the outer wall of the first straight gear 308 inside the sampling tank 2 is slidably connected to a pressing rod 309, the bottom end of the pressing rod 309 is fixedly connected to a displacement plate 310, a first spring 311 is connected between the displacement plate 310 and the sampling tank 2, and the bottom end of the displacement plate 310 is rotatably connected to the first rotating plate 312.

[0030] In this embodiment: when sampling, multiple sampling tanks 2 are installed in sequence below the connecting rod 1. At this time, the connecting shaft 302 and the first threaded rod 303 are connected by the cooperation of the parts in the connecting mechanism 5. The movable plate 304 is located in the sampling tank 2 to divide the inner cavity of the sampling tank 2 into an upper cavity and a lower cavity. The sampling tank 2 is placed in water, and the water enters the upper cavity through the water outlet 305. When the sampling tank 2 moves to a suitable depth, the motor 301 is started, and the motor 301 drives the connecting shaft 302 to rotate. The rotation of the connecting shaft 302 drives the first threaded rod 303 to rotate. The rotation of the first threaded rod 303 drives the movable plate 304 to move upward, and the water in the upper cavity passes through the upper cavity. The water is discharged from the water outlet 305, and the external water enters the lower cavity of the sampling tank 2 through the sampling port 306 for collection operation, until the movable plate 304 moves to the top of the inner wall of the sampling tank 2, at which time the movable plate 304 contacts the extrusion rod 307, pushing the extrusion rod 307 to move, and the displacement of the extrusion rod 307 drives the first straight gear 308 to rotate, and the rotation of the first straight gear 308 drives the lower pressure rod 309 to move, and the displacement of the lower pressure rod 309 drives the displacement plate 310 to move, causing the first spring 311 to stretch, and the displacement of the displacement plate 310 drives the first rotating plate 312 to move to block the sampling port 306, thereby completing the sampling operation of water at different depths. This design facilitates simultaneous sampling of water at different depths, and different numbers of sampling tanks 2 can be changed according to different sampling depths to perform sampling operations, thereby realizing stratified sampling and analysis of water areas.

[0031] Please refer to Figure 6 to Figure 7The connecting mechanism 5 includes a lower connecting seat 501 and an upper connecting seat 502, the lower connecting seat 501 is fixedly connected to the bottom end of the connecting rod 1 and the sampling tank 2, the upper connecting seat 502 is fixedly connected to the top of the sampling tank 2, the bottom end of the first threaded rod 303 is fixedly connected to a docking plate 503, the bottom end of the docking plate 503 is provided with a socket 504, the top end of the first threaded rod 303 is fixedly connected to a ratchet 505, the top end of the ratchet 505 is fixedly connected to a plug rod 506, the bottom end of the lower connecting seat 501 is fixedly connected to a mounting block 507, the interior of the mounting block 507 is slidably connected to a fixed block 508 extending from the mounting block 507, a second spring 509 is connected between the fixed block 508 and the mounting block 507, the top of the fixed block 508 is fixedly connected to a vertical plate 510, and the lower connecting seat 50 1 is rotatably connected with a rotating column 511, and a second threaded rod 512 is fixedly connected to the bottom end of the rotating column 511. A positioning rod 513 is slidably connected to the interior of the mounting block 507 above the fixed block 508, and the second threaded rod 512 extends to the interior of the positioning rod 513. A mounting groove 514 is provided at the top of the upper connecting seat 502. A clamping block 515 is slidably connected to the interior of the upper connecting seat 502 at one side of the ratchet 505, and a third spring 516 is connected between the clamping block 515 and the upper connecting seat 502. A second spur gear 517 is rotatably connected to the interior of the upper connecting seat 502 at the bottom end of the clamping block 515, and a displacement block 518 is slidably connected to the interior of the upper connecting seat 502 at the bottom end of the second spur gear 517. The displacement block 518 extends to the inner cavity of the mounting groove 514.

[0032] In this embodiment, when connecting the connecting rod 1 and the sampling tank 2 and between the two sampling tanks 2, the lower connecting seat 501 is fitted with the upper connecting seat 502, the mounting block 507 is inserted into the mounting groove 514, and the fixed block 508 is forced to move into the mounting block 507 until the lower end of the fixed block 508 moves out of the mounting groove 514. The fixed block 508 is moved out of the mounting block 507 by the elastic force of the second spring 509 and contacts the outer wall of the bottom of the upper connecting seat 502, thereby fixing the lower connecting seat 501 and the upper connecting seat 502. The rotation column 511 is then rotated, and the rotation of the rotation column 511 drives the second threaded rod 512 to rotate, and the rotation of the second threaded rod 512 drives the positioning rod 513 to move, and the positioning rod 513 moves and contacts with the vertical plate 510 to prevent the vertical plate 510 from moving, thereby reinforcing the fixed block 508; when separating, the rotation column 511 is rotated to drive the positioning rod 513 to separate from the vertical plate 510, and then the fixed block 508 is pushed to move into the installation block 507, thereby canceling the fixation between the lower connecting seat 501 and the upper connecting seat 502.

[0033] When the lower connecting seat 501 and the upper connecting seat 502 are docked, the insertion rod 506 is inserted into the insertion hole 504, so that the docking plate 503 and the ratchet 505 are docked, so that the connecting shaft 302 and the first threaded rod 303 can be rotated synchronously; at the same time, when the mounting block 507 is inserted into the mounting groove 514, the mounting block 507 contacts the displacement block 518, pushing the displacement block 518 to displace, and the displacement of the displacement block 518 drives the second spur gear 517 to rotate, and the rotation of the second spur gear 517 drives the clamping block 515 to displace and separate from the ratchet 505, causing the third spring 516 to be squeezed, so that the ratchet 505 can rotate; after the lower connecting seat 501 and the upper connecting seat 502 are separated, the clamping block 515 is engaged with the ratchet 505 by the elastic force of the third spring 516, thereby preventing the first threaded rod 303 from loosening, and facilitating the rapid installation and disassembly of the sampling tank 2.

[0034] Please refer to Figure 5 The discharging mechanism 4 includes a groove 401, which is opened at the bottom end of the inner wall of the sampling port 306. The outer wall of the sampling tank 2 is located on one side of the groove 401 and is rotatably connected with a second rotating plate 402. A through hole 403 is opened on the outer wall of the second rotating plate 402. A mounting hole 404 is opened at the position where the sampling tank 2 and the through hole 403 are connected. The inner wall of the mounting hole 404 is threadedly connected with a bolt 405.

[0035] In this embodiment: when the first rotating plate 312 moves downward, the first rotating plate 312 is inserted into the groove 401 to close the sampling port 306. When the water in the sampling tank 2 is taken out, the bolt 405 can be taken out from the mounting hole 404, and the fixation of the second rotating plate 402 is canceled. The second rotating plate 402 is rotated, and the second rotating plate 402 is separated from the first rotating plate 312, so that the first rotating plate 312 has a rotatable space. The first rotating plate 312 is rotated to open the sampling port 306, so that the water in the sampling tank 2 can be taken out for sampling.

[0036] Please refer to Figures 1 to 5 The outer wall of the movable plate 304 is in contact with the inner wall of the sampling tank 2 . A first threaded hole is formed on the outer wall of the movable plate 304 . The first threaded hole matches the first threaded rod 303 .

[0037] In this embodiment, the connection shaft 302 rotates to drive the first threaded rod 303 to rotate, and the first threaded rod 303 rotates to drive the movable plate 304 to slide in the sampling tank 2.

[0038] Please refer to Figures 1 to 5 The outer walls of the extrusion rod 307 and the lower pressing rod 309 are both provided with a first tooth groove, and the first tooth groove is meshed with the first spur gear 308 .

[0039] In this embodiment: the movable plate 304 contacts the extrusion rod 307, pushing the extrusion rod 307 to move, the displacement of the extrusion rod 307 drives the first spur gear 308 to rotate, the rotation of the first spur gear 308 drives the pressing rod 309 to move, and the displacement of the pressing rod 309 drives the displacement plate 310 to move.

[0040] Please refer to Figure 6 to Figure 7 , the inner wall of the insertion hole 504 fits with the outer wall of the insertion rod 506.

[0041] In this embodiment: when the lower connecting seat 501 and the upper connecting seat 502 are docked, the insertion rod 506 is inserted into the insertion hole 504, so that the docking plate 503 and the ratchet 505 are docked, so that the connecting shaft 302 and the first threaded rod 303 can rotate synchronously.

[0042] Please refer to Figure 6 to Figure 7 The outer wall of the mounting block 507 is in contact with the inner wall of the mounting groove 514 , and one end of the fixing block 508 extending out of the mounting block 507 is provided with a first inclined surface.

[0043] In this embodiment: the mounting block 507 is inserted into the mounting groove 514, and the fixed block 508 is forced to move into the mounting block 507 until the lower end of the fixed block 508 moves out of the mounting groove 514. The fixed block 508 is moved out of the mounting block 507 by the elastic force of the second spring 509 and contacts the bottom outer wall of the upper connecting seat 502, thereby performing a fixing operation between the lower connecting seat 501 and the upper connecting seat 502.

[0044] Please refer to Figure 6 to Figure 7 A second threaded hole is formed at the top of the positioning rod 513 , and the second threaded hole matches the second threaded rod 512 .

[0045] In this embodiment, the rotating column 511 is rotated, and the rotation of the rotating column 511 drives the second threaded rod 512 to rotate, and the rotation of the second threaded rod 512 drives the positioning rod 513 to move.

[0046] Please refer to Figure 6 to Figure 7 One end of the clamping block 515 is engaged with the ratchet 505, and the outer walls of the clamping block 515 and the displacement block 518 are both provided with a second tooth groove, the second tooth groove is meshed with the second spur gear 517, and one end of the displacement block 518 extending to the inner cavity of the installation groove 514 is provided with a second inclined surface.

[0047] In this embodiment: when the mounting block 507 is inserted into the mounting groove 514, the mounting block 507 contacts the displacement block 518, pushing the displacement block 518 to move, and the displacement of the displacement block 518 drives the second spur gear 517 to rotate. The rotation of the second spur gear 517 drives the clamping block 515 to move and separate from the ratchet 505, causing the third spring 516 to be squeezed, so that the ratchet 505 can rotate.

[0048] Please refer to Figure 5 The inner wall of the groove 401 fits with the outer wall of the first rotating plate 312 , and the inner wall of the through hole 403 matches with the outer wall of the screw of the bolt 405 .

[0049] In this embodiment: the bolt 405 is taken out from the mounting hole 404, the fixation of the second rotating plate 402 is cancelled, and the second rotating plate 402 is rotated to separate the second rotating plate 402 from the first rotating plate 312, so that the first rotating plate 312 has a rotatable space.

[0050] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A water quality stratified sampling and preparation device, comprising a connecting rod (1) and a sampling tank (2), wherein the sampling tank (2) is arranged below the connecting rod (1), and is characterized in that: The sampling tank (2) performs sampling operation via a sampling mechanism (3); the connecting rod (1) and the sampling tank (2) and the two sampling tanks (2) are connected via a connecting mechanism (5); and the water sample obtained from the sampling tank (2) is discharged via a discharge mechanism (4); The sampling mechanism (3) comprises a motor (301), the motor (301) being mounted on the top end of the connecting rod (1), the output end of the motor (301) being connected to a connecting shaft (302), the interior of the sampling tank (2) being rotatably connected to a first threaded rod (303), the outer wall of the first threaded rod (303) being connected to a movable plate (304), the movable plate (304) being slidably connected to the inner cavity of the sampling tank (2), the top end of the sampling tank (2) being provided with a water outlet (305), the outer wall of one side of the sampling tank (2) being provided with a sampling port (306), and the sampling tank (2) being provided with a water outlet (305). ) is slidably connected to an extrusion rod (307) extending into the inner cavity of the sampling tank (2); the interior of the sampling tank (2) is rotatably connected to an outer wall of the extrusion rod (307) and a first spur gear (308); the interior of the sampling tank (2) is slidably connected to an outer wall of the first spur gear (308); the interior of the sampling tank (2) is slidably connected to a pressing rod (309); the bottom end of the pressing rod (309) is fixedly connected to a displacement plate (310); a first spring (311) is connected between the displacement plate (310) and the sampling tank (2); and the bottom end of the displacement plate (310) is rotatably connected to a first rotating plate (312).

2. A water quality stratified sampling and sample preparation device according to claim 1, characterized in that: The connecting mechanism (5) comprises a lower connecting seat (501) and an upper connecting seat (502), wherein the lower connecting seat (501) is fixedly connected to the connecting rod (1) and the bottom end of the sampling tank (2), and the upper connecting seat (502) is fixedly connected to the top end of the sampling tank (2). The bottom end of the first threaded rod (303) is fixedly connected to a docking plate (503), and a socket (504) is provided at the bottom end of the docking plate (503). The top end of the first threaded rod (303) is fixedly connected to a A ratchet wheel (505), the top end of the ratchet wheel (505) is fixedly connected to a plug rod (506), the bottom end of the lower connecting seat (501) is fixedly connected to a mounting block (507), the interior of the mounting block (507) is slidably connected to a fixed block (508) extending from the mounting block (507), a second spring (509) is connected between the fixed block (508) and the mounting block (507), the top end of the fixed block (508) is fixedly connected to a vertical plate (510), and the lower connecting seat The outer wall of the upper connecting seat (501) is rotatably connected to a rotating column (511), the bottom end of the rotating column (511) is fixedly connected to a second threaded rod (512), the interior of the mounting block (507) is located above the fixed block (508) and is slidably connected to a positioning rod (513), the second threaded rod (512) extends to the interior of the positioning rod (513), the top end of the upper connecting seat (502) is provided with a mounting groove (514), the interior of the upper connecting seat (502) is located above the ratchet (5 05) is slidably connected to one side of the clamping block (515), a third spring (516) is connected between the clamping block (515) and the upper connecting seat (502), a second spur gear (517) is rotatably connected to the interior of the upper connecting seat (502) at the bottom end of the clamping block (515), a displacement block (518) is slidably connected to the interior of the upper connecting seat (502) at the bottom end of the second spur gear (517), and the displacement block (518) extends to the inner cavity of the mounting groove (514).

3. A water quality stratified sampling and sample preparation device according to claim 2, characterized in that: The discharging mechanism (4) comprises a groove (401), wherein the groove (401) is formed at the bottom end of the inner wall of the sampling port (306); the outer wall of the sampling tank (2) is located on one side of the groove (401) and is rotatably connected to a second rotating plate (402); a through hole (403) is formed on the outer wall of the second rotating plate (402); a mounting hole (404) is formed at a position where the sampling tank (2) and the through hole (403) meet; and a bolt (405) is threadedly connected to the inner wall of the mounting hole (404).

4. A water quality stratified sampling and sample preparation device according to claim 1, characterized in that: The outer wall of the movable plate (304) fits with the inner wall of the sampling tank (2), and a first threaded hole is formed on the outer wall of the movable plate (304), and the first threaded hole matches the first threaded rod (303).

5. A water quality stratified sampling and sample preparation device according to claim 1, characterized in that: The outer walls of the extrusion rod (307) and the pressing rod (309) are both provided with a first tooth groove, and the first tooth groove is meshed with the first spur gear (308).

6. A water quality stratified sampling and sample preparation device according to claim 2, characterized in that: The inner wall of the insertion hole (504) fits into the outer wall of the insertion rod (506).

7. A water quality stratified sampling and sample preparation device according to claim 2, characterized in that: The outer wall of the mounting block (507) fits into the inner wall of the mounting groove (514), and one end of the fixing block (508) extending out of the mounting block (507) is provided with a first inclined surface.

8. A water quality stratified sampling and sample preparation device according to claim 2, characterized in that: A second threaded hole is formed at the top end of the positioning rod (513), and the second threaded hole matches the second threaded rod (512).

9. A water quality stratified sampling and sample preparation device according to claim 2, characterized in that: One end of the clamping block (515) is engaged with the ratchet (505); outer walls of the clamping block (515) and the displacement block (518) are both provided with a second tooth groove, the second tooth groove is meshed with the second spur gear (517); and one end of the displacement block (518) extending to the inner cavity of the installation groove (514) is provided with a second inclined surface.

10. A water quality stratified sampling and sample preparation device according to claim 3, characterized in that: The inner wall of the groove (401) fits with the outer wall of the first rotating plate (312), and the inner wall of the through hole (403) matches with the outer wall of the screw rod of the bolt (405).

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