Aqueous sediment sample sampling device

Abstract

The invention provides a water-based sediment sample sampling device, and relates to the technical field of material determination sampling, the water-based sediment sample sampling device comprises a sampling device body, the sampling device body is used for realizing the purposes of storing and re-sampling collected water-based sediments, the sampling device body comprises a sample tank, a locking mechanism and an equal-ratio sampling assembly, an opening is formed in the top of the sample tank, a linkage sliding block is embedded in the opening, and a long screw rod is inserted in the linkage sliding block. The device is used for storing the collected water-based sediments for a long time and sampling the stored water-based sediments again from the device provided by the invention at any time, the solid-liquid ratio of a small amount of samples extracted at the time can be kept fixed during sampling at each time, the effectiveness of each sample sampled for multiple times is improved, and the sampling efficiency is improved. Meanwhile, the separation effect on the samples in the divided range in the sampling process is further improved, the leakage probability is reduced, and the effectiveness of multiple times of sampling is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of material determination sampling, and specifically to a sampling device for aqueous sediment samples. Background Art

[0002] Aqueous sediments refer to the particulate matter transported or precipitated in the river channel, which record important information on the formation and evolution of the continental crust. After the aqueous sediments are collected, they will be stored. When detection experiments need to be carried out during the long-term storage process, a small amount of sampling is directly performed on the large amount of aqueous sediments collected and stored, and the inspection is carried out on the samples taken from this small part. Therefore, the same batch of aqueous sediments can be sampled multiple times, and this process requires the use of storage equipment for a large amount of aqueous sediments and a sampling device during the storage process.

[0003] In the prior art, for the sampling process of the collected aqueous sediments, it can be directly extracted from the inside of the sample tank by a suction device. However, during the long-term storage of the aqueous sediments, precipitation will occur. Therefore, affected by this phenomenon, it is difficult for conventional sampling devices to directly extract the precipitated part at the bottom layer and the surface solution part of the aqueous sediments in equal proportion. For example, if the solid-liquid ratio of this batch of aqueous sediments is 1:10, when using a traditional sampling device to extract this batch of aqueous sediments, if the extraction point is too high, it will result in excessive liquid extraction, and ultimately the solid-liquid ratio of the sample extracted this time will be less than 1:10. Especially when sampling continuously for multiple times, the first extraction will cause the precipitated part at the bottom layer to be stirred and unable to quickly spread flat in the bottom area, resulting in the inability to obtain a sample with the same solid-liquid ratio as the first extraction for the second extraction. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide a sampling device for aqueous sediment samples to solve the problems raised in the above background art. The present invention is used for long-term storage of the collected aqueous sediments and for re-sampling the stored aqueous sediments from the device provided by the present invention at any time. Each sampling can ensure that the solid-liquid ratio of the small amount of sample extracted this time remains fixed, improving the effectiveness of each sample for multiple samplings. At the same time, it further improves the separation effect of the samples within the divided range during the sampling process, reduces the leakage probability, and improves the effectiveness of multiple samplings.

[0005] To achieve the above object, the present invention is realized through the following technical solutions: a water system sediment sample sampling device, including a sampling device body, the sampling device body includes a sample tank, a locking mechanism and an equal ratio sampling component. An opening is provided at the top of the sample tank, a linkage slider is embedded inside the opening, a long screw rod is inserted inside the linkage slider, support rings are sleeved at both ends of the sample tank, brackets are welded to the bottom of the support rings, a bottom plate is integrally formed at the bottom of the brackets, a locking mechanism is installed on the surface of the bottom plate, the top of the locking mechanism abuts against the bottom end of the sample tank, an equal ratio sampling component is inserted inside the sample tank, a sampling plate and a partition plate are installed at the end of the equal ratio sampling component, and both the sampling plate and the partition plate are integrally in a semi-circular structure. The long screw rod is inserted downward from the inside of the opening into the inside of the sample tank, and the end of the long screw rod is used to dock with the sampling plate or the partition plate.

[0006] Further, sealing sleeves are provided at both ends of the sample tank, the equal ratio sampling component passes through the inside of the sealing sleeves, a second chute is provided inside the bottom plate, and a positioning stop rod is integrally formed on the surface of the bottom plate. A locking hole is provided at the bottom end of the surface of the sample tank.

[0007] Further, the number of the openings is two, and a sealing cover plate is connected to one end of each opening, and one end of the opening abuts against one side of the support ring, and a gap is provided between the other end of the opening and the support ring on the other side.

[0008] Further, the sample tank is integrally in a columnar structure, arc-shaped observation windows are provided at both ends of the surface of the sample tank, and a sampling pipeline is connected to one end of the bottom of the sample tank.

[0009] Further, the locking mechanism includes a sliding plate, a supporting plate and a spring rod. A convex strip is integrally formed at the bottom of the sliding plate, a lifting sleeve is welded on the surface of the sliding plate, and a supporting plate is welded to the top of the lifting sleeve.

[0010] Further, the supporting plate is integrally in an arc-shaped structure, and first balls are embedded on the surface of the supporting plate. A spring rod is inserted inside the lifting sleeve, a limiting convex ring is integrally formed at the top side of the spring rod, and a second ball is embedded at the top end of the spring rod.

[0011] Further, the sliding plate is embedded inside the second chute through the convex strip at the bottom, the supporting plate abuts against the surface of the sample tank through the first balls on the surface, the top end of the spring rod passes upward from the inside of the lifting sleeve, and the second ball is used to be embedded inside the locking hole.

[0012] Furthermore, the equal-ratio sampling assembly includes a first push rod, a second push rod, a sampling plate and a partition plate. Docking columns are integrally formed at the ends of the first push rod and the second push rod. Rubber strips are attached to the sides of the sampling plate and the partition plate, and slots and extrusion grooves are formed on the sides of the sampling plate and the partition plate.

[0013] Furthermore, arc-shaped grooves are formed in the middle of the sampling plate and the partition plate. A sealing film is bonded to the side of the arc-shaped groove. Insertion layers are formed on the inner wall of the arc-shaped groove. Insertion plates are integrally formed on the sides of the docking columns. The insertion plates are embedded inside the insertion layers. Magnetic attraction plates are attached to the ends of the docking columns. First sliding grooves are provided on the inner walls of the openings. Threaded sleeves are formed inside the linkage sliders. The long screw passes through the inside of the threaded sleeve. The end of the long screw is embedded inside the slot or the extrusion groove. The sampling plate and the partition plate are both attached to the inner wall of the sample tank through the rubber strips on the sides. The first push rod and the second push rod are attached to each other by magnetic attraction.

[0014] Furthermore, this sampling device is used for storing the collected water system sediments and the process of re-sampling. The collected water system sediments are directly stored in the sample tank for long-term retention, and when it is necessary to use the stored water system sediments, sampling is directly carried out from the inside of the sample tank.

[0015] Advantages of the present invention:

[0016] 1. This water system sediment sample sampling device can control the rotation of the sample tank with the help of the movable support structures at both ends, and with the help of this rotation effect, all the samples inside the sample tank can be quickly mixed and tiled, and the sediment part can also be evenly distributed at every position inside the sample tank. The rotation process can also cooperate with the moving state of the locking mechanism to avoid the blocking problem caused by the top opening, with higher flexibility.

[0017] 2. This water system sediment sample sampling device is internally equipped with two groups of equal-ratio sampling assemblies. Each time sampling is carried out, one of the sampling plates can be pulled, and the other sampling plate blocks the samples that are not within the scope of this sampling. With the help of this structure, even if sampling is carried out multiple times, it can ensure that the solid-liquid ratio of each sampling remains the same, improving the effectiveness of each sample in multiple samplings.

[0018] 3. Every time this water system sediment sample sampling device conducts sampling, it can increase the extrusion force between the bottom sampling plate and the bottom end of the inner wall of the sample tank with the help of the long screw at the top, further improving the separation effect of the samples within the divided range during the sampling process, and effectively reducing the probability of penetration between the samples of this sampling and other samples. Description of the Drawings

[0019] Figure 1 This is a schematic structural diagram of the external shape of the sampling device for aqueous sediment samples of the present invention;

[0020] Figure 2 This is a structural diagram of the interior of the sample can of the present invention;

[0021] Figure 3 This is an internal cross-sectional view of the sample can of the present invention when no sampling is carried out;

[0022] Figure 4 This is an internal cross-sectional view of the sample can during the sampling process of the present invention;

[0023] Figure 5 is Figure 3 an enlarged view of area A in

[0024] Figure 6 This is a schematic structural diagram of the locking mechanism part of the present invention;

[0025] Figure 7 This is an exploded view of the end of the equal-ratio sampling assembly of the present invention;

[0026] In the figure: 1, sample can; 2, support ring; 3, opening; 4, bracket; 5, bottom plate; 6, locking mechanism; 7, equal-ratio sampling assembly; 8, observation window; 9, first push-pull rod; 10, second push-pull rod; 11, sampling plate; 12, partition board; 13, long screw; 14, docking column; 15, slot; 16, knob; 17, linkage slider; 18, first chute; 19, rubber strip; 20, threaded sleeve; 21, second chute; 22, positioning stop bar; 23, sliding plate; 24, convex strip; 25, lifting sleeve; 26, support plate; 27, first ball; 28, spring rod; 29, limit convex ring; 30, conical column; 31, second ball; 32, extrusion groove; 33, arc groove; 34, sealing film; 35, plug-in sandwich; 36, plug-in board; 37, magnetic attraction plate; 38, sealing sleeve; 39, sealing cover plate; 40, locking hole. Detailed implementation manners

[0027] To make the technical means, creative features, achieved purposes and effects of the present invention easy to understand, the present invention will be further described below in conjunction with specific implementation manners.

[0028] Please refer to Figures 1 to 7 , the present invention provides the following technical solutions: A sampling device for aqueous sediment samples. This sampling device for aqueous sediment samples can be used for long-term storage of aqueous sediment samples collected in the same batch, and the storage process is directly placed in the sample can 1. At the same time, this device can also be used to extract a small amount of samples from this batch of aqueous sediment samples again for temporary detection and research during the above-mentioned long-term storage process.

[0029] The sampling device provided in this embodiment includes a sampling device body, and the sampling device body includes a sample tank 1, a locking mechanism 6, and a proportional sampling assembly 7. An opening 3 is provided at the top of the sample tank 1. A linkage slider 17 is embedded in the opening 3. A long screw 13 is inserted into the linkage slider 17. Support rings 2 are sleeved at both ends of the sample tank 1. A bracket 4 is welded to the bottom of the support ring 2. A bottom plate 5 is integrally formed at the bottom of the bracket 4. A locking mechanism 6 is installed on the surface of the bottom plate 5. The top of the locking mechanism 6 abuts against the bottom end of the sample tank 1. A proportional sampling assembly 7 is inserted into the sample tank 1. A sampling plate 11 and a partition plate 12 are installed at the end of the proportional sampling assembly 7. Both the sampling plate 11 and the partition plate 12 are integrally in a semi-circular structure. The long screw 13 is inserted downward from the inside of the opening 3 into the inside of the sample tank 1, and the end of the long screw 13 is used to dock with the sampling plate 11 or the partition plate 12. This sampling device is used to perform rapid multiple sampling processes on a large amount of water system sediment samples stored in the sample tank 1.

[0030] When the present invention is in use, the sample is stored inside the sample tank 1, and the storage capacity should not exceed the bottom area of the push rod of the proportional sampling assembly 7 inside. When performing multiple samplings subsequently, first move the locking mechanism 6 to Figure 1 the leftmost area in []. At this time, manually control the sample tank 1 to swing reciprocally. By means of the rotation effect, the internal water system sediment and solution parts are evenly dispersed toward the side. Then let it stand for a period of time, and then manually control the proportional sampling assembly 7 to move. Determine the number of samplings and the proportion of each sampling in the total sample. In this embodiment, it is set to perform two samplings, and each sampling accounts for one-third of the total sample capacity to explain the sampling process. Then control the locking mechanism 6 to lock the sample tank 1, and then simultaneously pull the first push rod 9 and the second push rod 10 at both ends to control the sampling plate 11 and the partition plate 12 to move synchronously to one-third of the sample tank 1. Control the rotation and pulling of the closed sampling assembly in sequence until the first sampling process is completed. Then, control the sampling plate 11 and the partition plate 12 to move to two-thirds of the sample tank 1 again, repeat the sampling process, and then complete the sampling work of two one-third sample volumes successively.

[0031] In this embodiment, sealing sleeves 38 are provided at both ends of the sample tank 1, the equal-ratio sampling assembly 7 passes through the inside of the sealing sleeve 38, a second chute 21 is provided inside the bottom plate 5, and a positioning stop rod 22 is integrally formed on the surface of the bottom plate 5. A locking hole 40 is provided at the bottom end of the surface of the sample tank 1. There are two openings 3, and a sealing cover plate 39 is connected to one end of each opening 3. One end of the opening 3 abuts against one side of the support ring 2, and a gap is provided between the other end of the opening 3 and the support ring 2 on the other side. The sample tank 1 is integrally in a columnar structure, and arc-shaped observation windows 8 are provided at both ends of the surface of the sample tank 1, and a sampling pipeline is connected to one end of the bottom of the sample tank 1.

[0032] Specifically, the entire sample tank 1 is in a horizontal columnar structure. Since both ends are supported by the support ring 2, when the locking mechanism 6 is moved to avoid one end of the opening 3, the sample tank 1 can be directly manually controlled to swing back and forth, and the aqueous sediment inside can be shaken evenly by means of the swinging effect of the sample tank 1. During this process, the sealing cover plate 39 at the top needs to partially close the opening 3 to reduce the probability of the internal sample splashing out. After standing for a period of time, it is judged whether the liquid inside is level through the observation windows 8 at both ends. After preparation, subsequent multiple consecutive sampling processes can be carried out by means of the equal-ratio sampling assembly 7.

[0033] In this embodiment, the locking mechanism 6 includes a sliding plate 23, a support plate 26 and a spring rod 28. A convex strip 24 is integrally formed at the bottom of the sliding plate 23, a lifting sleeve 25 is welded on the surface of the sliding plate 23, and a support plate 26 is welded on the top of the lifting sleeve 25. The support plate 26 is integrally in an arc-shaped structure, and a first ball 27 is embedded on the surface of the support plate 26. A spring rod 28 is inserted into the inside of the lifting sleeve 25. A limit convex ring 29 is integrally formed at the top side of the spring rod 28, and a second ball 31 is embedded at the top end of the spring rod 28. The sliding plate 23 is inserted into the inside of the second chute 21 through the convex strip 24 at the bottom, the support plate 26 abuts against the surface of the sample tank 1 through the first ball 27 on the surface, the top end of the spring rod 28 passes upward through the inside of the lifting sleeve 25, and the second ball 31 is used to be embedded into the locking hole 40. With the movable support structures at both ends, the swinging movement of the sample tank 1 can be controlled, and all the samples inside the sample tank 1 can be quickly mixed and laid flat by means of this swinging effect, and the sediment part can also be evenly distributed at every position inside the sample tank 1. The swinging process can also cooperate with the moving state of the locking mechanism 6 to avoid the blocking problem caused by the top opening 3, with higher flexibility.

[0034] Specifically, since the entire sample tank 1 needs to shake the internal sample solution in a swinging or rotating manner, during the shaking process, only the supporting effect is provided by the locking mechanism 6 at the bottom. During this process, it is necessary to pull the sliding plate 23 at the bottom to drive the lifting sleeve 25, the support plate 26, and the spring rod 28 structure at the top to move. When the shaking is completed and sampling is to be performed, the sliding plate 23 needs to be pulled to move the locking mechanism 6 to the middle position of the sample tank 1. At this time, the spring rod 28 inside pushes the second ball 31 at the top upward and embeds it into the locking hole 40, so that the entire sample tank 1 can be clamped by the cooperation of the locking hole 40 and the second ball 31, preventing the sample tank 1 from rotating again during the subsequent process.

[0035] In this embodiment, the equal-ratio sampling assembly 7 includes a first push rod 9, a second push rod 10, a sampling plate 11, and a partition plate 12. Docking posts 14 are integrally formed at the ends of the first push rod 9 and the second push rod 10. Rubber strips 19 are attached to the sides of the sampling plate 11 and the partition plate 12, and slots 15 and extrusion grooves 32 are provided on the sides of the sampling plate 11 and the partition plate 12. Arc-shaped grooves 33 are provided in the middle of the sampling plate 11 and the partition plate 12. A sealing film 34 is bonded to the side of the arc-shaped groove 33. Insertion layers 35 are provided on the inner wall of the arc-shaped groove 33. Insertion plates 36 are integrally formed on the sides of the docking posts 14, and the insertion plates 36 are embedded in the insertion layers 35. Magnetic attraction plates 37 are attached to the ends of the docking posts 14. A first sliding groove 18 is provided on the inner wall of the opening 3. A threaded sleeve 20 is provided inside the linkage slider 17, and the long screw rod 13 passes through the threaded sleeve 20. The end of the long screw rod 13 is embedded in the slot 15 or the extrusion groove 32. The sampling plate 11 and the partition plate 12 are both attached to the inner wall of the sample tank 1 through the rubber strips 19 on the sides. The first push rod 9 and the second push rod 10 are attached to each other by magnetic attraction through the magnetic attraction plates 37. Two groups of equal-ratio sampling assemblies 7 are installed inside. Each time sampling is performed, one of the sampling plates 11 can be pulled, and the other sampling plate 11 blocks the samples that are not within the sampling range for this time. With this structure, even if sampling is performed multiple times, it can ensure that the solid-liquid ratio of each sampling remains consistent, improving the effectiveness of each sample for multiple samplings.

[0036] Specifically, after moving the first push rod 9 and the second push rod 10 to drive the sampling plate 11 and the partition plate 12 to the one-third position of the sample tank 1, in this initial stage, both the sampling plate 11 and the partition plate 12 are in a vertically upward state, that is Figure 3In the state shown, the long screw rod 13 is inserted into the interior of the slot 15 to synchronously drive the linkage slider 17 to move along the opening 3. After moving into place, the long screw rod 13 can be taken out from the opening 3, and the first push rod 9 and the second push rod 10 are manually controlled to drive the sampling plate 11 and the partition plate 12 to rotate until the sampling plate 11 and the partition plate 12 are inserted into the one-third position of the sample inside the sample tank 1, forming Figure 4 In this state, at this time, the pressure of the sampling plate 11 and the partition plate 12 on the inner wall of the sample tank 1 is increased by the long screw rod 13, and only the first push rod 9 is pulled to pull one end of the sampling plate 11 towards the sampling pipeline, opening the sealing structure on the sampling pipeline, and then one-third of the sample inside the sample tank 1 can be completely discharged from the inside of the sampling pipeline along with the push of the sampling plate 11. After discharging, the sampling plate 11 and the partition plate 12 are fitted again, and the partition plate 12 is controlled to rotate again to Figure 3 In this state, it vertically moves upward along the sample tank 1 to the two-thirds position. At this time, the above process is repeated to rotate the partition plate 12 to Figure 4 In this state, and the sampling plate 11 is controlled to move to fit with the partition plate 12 again, and then the one-third sample divided this time can be pushed out continuously.

[0037] During each sampling, the extrusion force between the bottom sampling plate 11 and the bottom end of the inner wall of the sample tank 1 can be increased by means of the long screw rod 13 at the top, which further improves the separation effect of the sample within the divided range during the sampling process, and also effectively reduces the probability of penetration between the sample taken this time and other samples. Specifically, after the long screw rod 13 is withdrawn from the interior of the slot 15, the sampling plate 11 and the partition plate 12 can be manually controlled to rotate. After rotating to be vertically downward, as Figure 4 shown, at this time, the long screw rod 13 is re-inserted into the interior of the sampling plate 11 and the partition plate 12, and it will directly abut against the inside of the extrusion groove 32. At this time, the entire sampling plate 11 and the partition plate 12 can be pressed against the inner wall of the sample tank 1 by means of this extrusion effect. Therefore, during the subsequent process of pulling the first push rod 9, the pressure between the sampling plate 11 and the sample tank 1 can be increased, improving the sealing performance. The docking column 14 also provides an expansion space for the movement of the sampling plate 11 and the partition plate 12 through the cooperation of the plug-in plate 36 and the plug-in sandwich layer 35, ensuring that this pressure can act on the rubber strip 19 smoothly to make it press against the inner wall of the sample tank 1.

[0038] Through the above sampling device, the purpose of storing the collected aqueous sediments for a long time is achieved. And during this storage time, the aqueous sediment samples of this batch can be sampled again in small amounts at any time from the sampling device provided by the present invention, and it is ensured that the solid-liquid ratio remains fixed each time a small amount of sampling is performed. Moreover, the solid-liquid ratio of the sample obtained each time a small amount of sampling is performed is also consistent with the overall solid-liquid ratio of the aqueous sediments. This enables each sample taken in small amounts to accurately reflect the actual parameters of this batch of aqueous sediments, without being interfered by the change in the solid-liquid ratio on subsequent use.

[0039] The above has shown and described the basic principles, main features and advantages of the present invention. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic features of the present invention, the present invention can be implemented in other specific forms.

[0040] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A water system sediment sample sampling device, comprising a sampling device body, characterized in that: The sampling device body comprises a sample tank (1), a locking mechanism (6) and a proportional sampling assembly (7); an opening (3) is provided at the top of the sample tank (1); a linkage slider (17) is embedded in the opening (3); a long screw (13) is inserted in the linkage slider (17); support rings (2) are sleeved at both ends of the sample tank (1); a bracket (4) is welded to the bottom of the support ring (2); a bottom plate (5) is integrally formed at the bottom of the bracket (4); a locking mechanism (6) is installed on the surface of the bottom plate (5); The locking mechanism (6) is provided with a top portion of the locking mechanism (6) against a bottom end of the sample tank (1); a geometric sampling assembly (7) is inserted into the interior of the sample tank (1); a sampling plate (11) and a baffle plate (12) are installed at the ends of the geometric sampling assembly (7); the sampling plate (11) and the baffle plate (12) are both semicircular in structure as a whole; the long screw (13) is inserted downward from the interior of the opening (3) into the inner side of the sample tank (1); and the end of the long screw (13) is used for docking with the sampling plate (11) or the baffle plate (12).

2. The water system sediment sampling device according to claim 1, characterized in that: Sealing sleeves (38) are provided at both ends of the sample tank (1), the proportional sampling assembly (7) passes through the inside of the sealing sleeve (38), a second slide groove (21) is provided inside the bottom plate (5), and a positioning blocking rod (22) is integrally formed on the surface of the bottom plate (5), and a locking hole (40) is provided at the bottom end of the surface of the sample tank (1).

3. The water system sediment sampling device according to claim 2, characterized in that: The number of the openings (3) is two, and one end of each opening (3) is connected to a sealing cover plate (39), and one end of the opening (3) is against one side of the support ring (2), and a gap is provided between the other end of the opening (3) and the support ring (2) on the other side.

4. The water system sediment sampling device according to claim 3, characterized in that: The sample tank (1) is of a columnar structure as a whole, and arc-shaped observation windows (8) are provided at both ends of the surface of the sample tank (1), and a sampling pipeline is connected to one end of the bottom of the sample tank (1).

5. The water system sediment sampling device according to claim 2, characterized in that: The locking mechanism (6) comprises a sliding plate (23), a supporting plate (26) and a spring rod (28); a convex strip (24) is integrally formed on the bottom of the sliding plate (23); a lifting sleeve (25) is welded on the surface of the sliding plate (23); and a supporting plate (26) is welded on the top of the lifting sleeve (25).

6. The water system sediment sampling device according to claim 5, characterized in that: The support plate (26) is an arc-shaped structure as a whole, and a first ball (27) is embedded on the surface of the support plate (26). A spring rod (28) is inserted inside the lifting sleeve (25). A limiting convex ring (29) is integrally formed on the top of the side of the spring rod (28), and a second ball (31) is embedded on the top of the spring rod (28).

7. The water system sediment sampling device according to claim 6, characterized in that: The sliding plate (23) is embedded in the second slide groove (21) through the convex strip (24) at the bottom, and the supporting plate (26) is pressed against the surface of the sample tank (1) through the first ball (27) on the surface. The top end of the spring rod (28) passes upward from the inside of the lifting sleeve (25), and the second ball (31) is used to be embedded in the inside of the locking hole (40).

8. The water system sediment sampling device according to claim 2, characterized in that: The proportional sampling assembly (7) comprises a first push-pull rod (9), a second push-pull rod (10), a sampling plate (11) and a baffle plate (12); the ends of the first push-pull rod (9) and the second push-pull rod (10) are integrally formed with docking posts (14); the sides of the sampling plate (11) and the baffle plate (12) are both attached with rubber strips (19); and the sides of the sampling plate (11) and the baffle plate (12) are provided with slots (15) and extrusion grooves (32).

9. The water system sediment sampling device according to claim 8, characterized in that: An arc-shaped groove (33) is provided in the middle of the sampling plate (11) and the blocking plate (12), a sealing film (34) is bonded to the side of the arc-shaped groove (33), a plug-in interlayer (35) is provided on the inner wall of the arc-shaped groove (33), a plug-in plate (36) is integrally formed on the side of the docking column (14), the plug-in plate (36) is embedded in the inside of the plug-in interlayer (35), a magnetic attraction plate (37) is attached to the end of the docking column (14), and a first sliding plate (37) is provided on the inner wall of the opening (3). The linkage slider (17) is provided with a threaded sleeve (20) inside, and the long screw (13) passes through the threaded sleeve (20); the end of the long screw (13) is embedded in the slot (15) or the extrusion slot (32), and the sampling plate (11) and the blocking plate (12) are both fitted with the inner wall of the sample tank (1) through the rubber strip (19) on the side, and the first push-pull rod (9) and the second push-pull rod (10) are adsorbed and fitted through the magnetic suction plate (37).

10. The water system sediment sampling device according to claim 1, characterized in that: The sampling device is used for storing and re-sampling collected water system sediments. The collected water system sediments are directly stored in a sample tank (1) for long-term retention, and when the stored water system sediments need to be used, sampling is directly performed from the inside of the sample tank (1).

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