Sediment stratified sampling device and method

Abstract

The invention relates to the technical field of sampling devices, and provides a bottom mud stratified sampling device and method.The device comprises a barrel, the cross section of the barrel is rectangular, the bottom of the barrel is provided with an opening, the inner wall of the bottom of the barrel is provided with a pair of opening sealing pieces capable of being opened and closed, and the end of the barrel extends to form a tool bit; wherein the tool bit comprises a movable blade and a fixed blade which are overlapped, the movable blade and the fixed blade are both in a sawtooth shape, and the movable blade can rub the fixed blade in a reciprocating mode to conduct cutting; an opening is formed in the bottom of the sampling box, the sampling box is detachably embedded in the cylinder body, a plurality of insertion seams used for insertion of the separation blades are formed in the side wall of the sampling box, and at least one detachable side plate is arranged between every two adjacent insertion seams; and the moving rod is connected to the top of the barrel and used for moving the barrel. The tool bit can cut various fibrous attachments covering the upper layer of bottom mud. The bottom mud can be layered by inserting the separation blade into the insertion seam of the sampling box, and the bottom mud which is kept in the original state can be respectively taken out by opening the side plate, so that the accuracy is improved.

Description

Technical Field

[0001] The invention relates to the technical field of sampling devices, and in particular to a sediment stratification sampling device and method. Background Art

[0002] In the fields of environmental science, ecology, and water conservancy engineering, sampling the sediments of rivers, lakes, and other water bodies in their original state is an important means of assessing water quality, ecological conditions, and the degree of sediment pollution. However, since the sediments are often semi-fluid and the upper layer is often covered with impurities such as plant roots, debris, and fibers, traditional sampling tools can easily destroy the original state of the sediments during the sampling process, resulting in inaccurate sampling results. Summary of the invention

[0003] In order to solve the technical problem that the traditional sampling tools in the prior art are easy to destroy the original state of the bottom mud during the sampling process, resulting in inaccurate sampling results, the embodiment of the present invention provides a bottom mud layered sampling device and method. The technical solution is as follows:

[0004] On the one hand, a sediment stratification sampling device is provided, the device comprising:

[0005] A cylinder, wherein the cross section of the cylinder is rectangular, the bottom of the cylinder is open, and the inner wall of the bottom of the cylinder is provided with a pair of seals that can be opened and closed, and a cutter head extends from the end of the cylinder;

[0006] Wherein, the cutter head comprises a superimposed moving blade and a stationary blade, and both the moving blade and the stationary blade are serrated, and the moving blade can reciprocate and rub against the stationary blade to perform cutting;

[0007] A sampling box, wherein the bottom of the sampling box has an opening, and the sampling box is detachably embedded in the cylinder, and a plurality of slots for inserting baffles are arranged on the side wall of the sampling box, and at least one detachable side panel is arranged between two adjacent slots;

[0008] A moving rod is connected to the top of the cylinder and is used to move the cylinder.

[0009] Optionally, the device comprises a drive mechanism;

[0010] The driving mechanism comprises a motor and a transmission member, wherein the motor is arranged on the moving rod, and the motor is connected to the moving blade through the transmission member and drives the moving blade to reciprocate.

[0011] Optionally, a handle is provided on the moving rod, a switch is provided on the handle, and the switch is communicatively connected with the motor.

[0012] Optionally, the sealing member comprises a multi-jointed movable door sheet, a traction rope and a reset member connected in series, the traction rope connects the movable door sheet and the handle, and guide rails are arranged on the bottom inner wall and the side wall of the cylinder;

[0013] The reset member can drive the movable door piece to open along the guide rail, and the traction rope can drive the movable door piece to close along the guide rail.

[0014] Optionally, the guide rail is arranged in a gap between the barrel and the sampling box.

[0015] Optionally, the cross section of the sampling box is rectangular;

[0016] A locking piece is arranged on the inner wall of the bottom of the cylinder body for fixing the sampling box.

[0017] Optionally, the sampling box and the top of the cylinder are both provided with air outlets.

[0018] Optionally, a limit plate is provided on the top of the cylinder, and the size of the limit plate is larger than the cross-sectional size of the cylinder.

[0019] Optionally, a scale mark is provided on the outer wall of the sampling box to indicate the sampling depth.

[0020] On the other hand, a method for stratified sediment sampling is provided, the method comprising:

[0021] Make sure the sealing piece is in the open state;

[0022] The moving blade is driven to reciprocate, so that the moving blade and the stationary blade rub against each other and cut the attachments on the upper layer of the bottom mud;

[0023] The moving rod is used to drive the cylinder to be inserted into the bottom mud to be sampled to reach the preset sampling depth;

[0024] Close the sealing piece;

[0025] Use a moving rod to drive the cylinder to move out of the bottom mud;

[0026] Insert a baffle into the slot of the sampling box, and the baffle divides the extracted sediment into different layers;

[0027] Take the sampling box out of the cylinder;

[0028] Open the side panels and take out the bottom mud located in different layers.

[0029] The beneficial effects brought about by the technical solution provided by the embodiment of the present invention include at least:

[0030] The bottom mud layered sampling device provided by the embodiment of the present invention can cut various plant roots, debris, plant fibers, etc. covering the upper layer of the bottom mud by arranging a cutter head at the bottom of the cylinder during use. A baffle is inserted into the slot of the sampling box, and the baffle can divide the bottom mud contained in the sampling box into different layers. After that, the side plate is opened to take out the bottom mud in different layers in its original state, thereby improving the accuracy of the sampling result. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0032] Figure 1 It is a structural schematic diagram of a sediment stratification sampling device provided by an embodiment of the present invention;

[0033] Figure 2 It is a schematic cross-sectional structure diagram of a sediment stratified sampling device provided by an embodiment of the present invention;

[0034] Figure 3 It is a flow chart of a sediment stratification sampling method provided by an embodiment of the present invention.

[0035] Reference numerals:

[0036] 1. Cylinder; 11. Sealing piece; 12. Cutting head; 13. Guide rail; 14. Traction rope; 15. Stopper; 16. Limiting plate;

[0037] 2. Sampling box; 21. Insertion slit; 22. Side panel;

[0038] 3. Move the rod;

[0039] 4. Driving mechanism;

[0040] 5. Handle. DETAILED DESCRIPTION

[0041] The technical solution of the present invention is described below in conjunction with the accompanying drawings.

[0042] In the embodiments of the present invention, words such as "exemplarily" and "for example" are used to indicate examples, illustrations or explanations. Any embodiment or design described as "example" in the present invention should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of the word "example" is intended to present the concept in a specific way. In addition, in the embodiments of the present invention, the meaning expressed by "and / or" can be both, or it can be either of the two.

[0043] In order to make the technical problems, technical solutions and advantages to be solved by the present invention more clear, a detailed description will be given below with reference to the accompanying drawings and specific embodiments.

[0044] The embodiment of the present invention provides a sediment stratification sampling device, Figure 1 It is a structural schematic diagram of a sediment stratification sampling device provided by an embodiment of the present invention; Figure 2 is a schematic diagram of the cross-sectional structure of a sediment stratification sampling device provided by an embodiment of the present invention, see Figure 1 to Figure 2 The device comprises: a cylinder 1, a sampling box 2 and a moving rod 3. The sampling box 2 is arranged inside the cylinder 1, and the moving rod 3 is connected to the top of the cylinder 1.

[0045] The cross section of the cylinder 1 is rectangular, the bottom of the cylinder 1 is open, and the bottom inner wall of the cylinder 1 is provided with a pair of openable and closable sealing members 11, which may be used to close or open the bottom of the cylinder 1 during sampling or cutting so as to control the entry and exit of substances.

[0046] A cutter head 12 extends from the end of the cylinder 1. The cutter head 12 includes a superimposed moving blade and a static blade, and both the moving blade and the static blade are serrated. The moving blade can reciprocate and rub against the static blade to cut, that is, cut like a barber. Specifically, the cutter head 12 can cut various plant roots, debris, plant fibers covering the upper layer of the bottom mud, and other various plastic fibers that affect the sampling tool when it cuts into the bottom mud and causes damage to the original bottom mud.

[0047] It should be noted that the widths of the moving blade and the static blade can be set as needed. For example, the widths of the moving blade and the static blade can both be 0.5 cm, which is not limited in this embodiment.

[0048] The sampling box 2 has an opening at the bottom, and the sampling box 2 is detachably embedded in the cylinder 1. The side wall of the sampling box 2 is provided with a plurality of slots 21 for inserting baffles, and there is at least one detachable side panel 22 between two adjacent slots 21. Specifically, the slot 21 can be in the shape of a long strip, and be of the same length as the corresponding side wall, so that the baffle can completely separate the bottom mud on both sides. The above-mentioned detachable side panel 22 can be made of a variety of waterproof and easy-to-tear materials, for example, the material can be a film or an easy-to-tear tape. The easy-to-tear tape is mostly made of plastic or paper, and a layer of adhesive is coated on the surface. The above-mentioned detachable side panel 22 can also be a plate body connected to the sampling box 2 by a hinge or other structure, which can be reused to reduce the cost of use.

[0049] The moving rod 3 is connected to the top of the barrel 1 and is used to move the barrel 1. Specifically, when in use, the operator can hold or use a device to clamp the moving rod 3 and move it downward, thereby driving the barrel 1 to move downward, so that the opening of the barrel 1 and the opening of the sampling box 2 are both facing downward, and move downward to take samples.

[0050] At the bottom of the river, due to long-term accumulation, there are often some plant roots, broken branches, rotten similar things, and fibrous attachments such as plastic or chemically synthesized wire bundles. During the sampling process, if this is not cut, the attachments will disturb the sediment layer, causing the sampling result to be not the original layer of sediment. Based on the device provided in this embodiment, when in use, determine that the sealing member 11 is in an open state; drive the moving blade to reciprocate so that the moving blade and the static blade rub and cut the attachments on the upper layer of the sediment; use the moving rod 3 to drive the cylinder 1 to insert into the sediment to be sampled to reach the preset sampling depth; close the sealing member 11; use the moving rod 3 to drive the cylinder 1 to move out of the sediment; use the baffle to insert the insertion slit 21 of the sampling box 2, and the baffle divides the removed sediment into different layers; remove the sampling box 2 from the cylinder 1; open the side panel 22 and remove the sediment in different layers.

[0051] When the device starts working, the sampling box 2 is first embedded in the device barrel 1. In the process of the device being pushed toward the bottom mud, the cutter head 12 is started, and the serrated cutter head 12 at the bottom of the device begins to move, which can cut various types of plant fibers and non-plant fibers in the bottom mud layer to prevent the bottom mud from jumping layers and destroying the original layers during the downward push. After the sampling box 2 is pushed to the full, the sealing member 11 is closed to seal the bottom opening of the device. The device is taken out of the bottom mud, and the sampling box 2 is taken out from the side of the barrel 1 according to the sample needs. The baffles are inserted at different depths to accurately separate the different layers of bottom mud. The detachable side panel 22 on the side of the sampling box 2 is disassembled to pour out the sample bottom mud.

[0052] The device is suitable for the presence of various plant fibers or roots on the riverbed mud, or the presence of various non-plant fibers in the mud, as well as softer mud or even semi-fluid mud.

[0053] The bottom mud layered sampling device provided by the embodiment of the present invention can cut various plant roots, debris, plant fibers, etc. covering the upper layer of the bottom mud by setting a cutter head 12 at the bottom of the cylinder 1. A baffle is inserted into the insertion slot 21 of the sampling box 2, and the baffle can divide the bottom mud contained in the sampling box 2 into different layers. After that, the side plate 22 is opened to take out the bottom mud in different layers in its original state, thereby improving the accuracy of the sampling result.

[0054] In an embodiment provided by the present invention, the device includes a driving mechanism 4; the driving mechanism 4 includes a motor and a transmission member, and the motor is arranged on the moving rod 3, and the motor is connected to the moving blade through the transmission member and drives the moving blade to reciprocate.

[0055] By arranging the motor on the moving rod 3, it is possible to avoid occupying the space inside the cylinder 1 and reduce the resistance during the sampling process. The above-mentioned transmission member converts the rotational power generated by the motor into the reciprocating motion required by the moving blade. The specific form of the transmission member may include gears, belts, chains, connecting rods, etc., which are not limited in this embodiment.

[0056] Furthermore, in an embodiment provided by the present invention, a handle 5 is provided on the moving rod 3, so that an operator can conveniently hold and move the entire device. This design improves the portability and operability of the device.

[0057] A switch is provided on the handle 5, and the switch is in communication connection with the motor. When the switch is in the on state, the motor starts to work and drives the moving blade to reciprocate; when the switch is in the off state, the motor stops working and the moving blade also stops moving. The operator can control the start and stop of the motor by simply pressing or toggling the switch, thereby controlling the reciprocating motion of the moving blade.

[0058] When performing sampling operations outdoors, the operator can conveniently hold the handle 5 and control the operation of the motor through the switch to complete the work task.

[0059] In one embodiment provided by the present invention, the sealing member 11 comprises a multi-jointed movable door sheet, a traction rope 14 and a reset member connected in series, the traction rope 14 connects the movable door sheet and the handle 5, and guide rails 13 are provided on the bottom inner wall and the side wall of the cylinder;

[0060] The reset member can drive the movable door piece to open along the guide rail 13 , and the traction rope 14 can drive the movable door piece to close along the guide rail 13 .

[0061] The door panels are connected in series via hinges to form a structure that can be expanded and contracted. When the door panels are expanded, they cover the bottom opening of the cylinder 1 to seal it; when the door panels are contracted, the bottom opening of the cylinder 1 is opened to allow the cylinder 1 to be filled with bottom mud or to take out a bottom mud sample from the cylinder 1.

[0062] Guide rails 13 are provided on the bottom inner wall and the side walls of the cylinder 1. The guide rails 13 provide guidance and support for the movement of the movable door leaf, ensuring that the door leaf can move smoothly and accurately along a predetermined path.

[0063] It should be noted that the reset member can be an elastic structure, which is in a stressed state and can drive the movable door sheet to move to one side or roll up along the guide rail 13, so that the bottom opening of the cylinder 1 is in an open state.

[0064] When the bottom opening of the cylinder 1 needs to be closed, the traction rope 14 is pulled to drive the movable door panels to move in the opposite direction or unfold downward along the guide rail 13 until all the door panels cover the bottom opening of the cylinder 1 .

[0065] Furthermore, in an embodiment provided by the present invention, the guide rail 13 is disposed in the gap between the cylinder 1 and the sampling box 2 to avoid occupying the space outside the cylinder 1 and reduce damage to the original state of the bottom mud.

[0066] In one embodiment provided by the present invention, the cross section of the sampling box 2 is rectangular, which fits the shape of the inner cavity of the cylinder 1; a retaining member 15 is provided on the inner wall at the bottom of the cylinder 1 to fix the sampling box 2. These retaining members 15 may exist in various forms, such as protrusions, grooves, buckles, etc. Correspondingly, the outside of the sampling box 2 may be provided with protrusions or grooves corresponding to the retaining members 15 so as to fit closely with the retaining members 15. Their function is to fix the sampling box 2 in the cylinder 1 to prevent it from moving or falling off during the sampling process, and to avoid the movement of the sampling box 2 during the sampling process to damage the original state of the bottom mud.

[0067] Specifically, a long hole is provided on the side of the cylinder 1 for the sampling box 2 to be inserted into, so as to avoid interference with the space at the bottom of the cylinder 1 and also facilitate the disassembly of the sampling box 2.

[0068] Specifically, the material of the sampling box 2 may be plastic, and the material of the baffle may be steel.

[0069] In one embodiment provided by the present invention, the side panel 22 is a manually removable film. The film material generally has the advantages of being light, flexible, easy to process and low cost, and the user can remove the side panel 22 by simply pulling or tearing it without using any tools or equipment, which is convenient and efficient.

[0070] In one embodiment provided by the present invention, a gas outlet is provided at the top of the sampling box 2 and the cylinder 1. In the process of moving the device downward, the bottom mud is filled into the sampling box 2 and the cylinder 1, and this design helps the gas to be discharged smoothly from the inside of the container.

[0071] In one embodiment provided by the present invention, a limit plate 16 is provided on the top of the cylinder 1, and the size of the limit plate 16 is larger than the cross-sectional size of the cylinder 1. During operation, when the cylinder 1 is fully inserted into the bottom mud, the sampling box 2 has completed sampling. At this time, the limit plate 16 covers the top of the bottom mud. Since the size of the limit plate 16 is large, the bottom mud will exert a large pressure on the limit plate 16, making it difficult for the device to continue to move downward. Therefore, for the operator, when it is felt that it is difficult to continue to move downward through the handle 5, the sampling is completed and subsequent operations can be performed. This structure can prevent the cylinder 1 from being inserted too shallowly and insufficient sampling, and can also avoid the effort of inserting too deeply.

[0072] In one embodiment provided by the present invention, a scale mark is provided on the outer wall of the sampling box 2 to indicate the sampling depth. Specifically, the scale mark can not only indicate the depth of the sampling box 2 inserted into the bottom mud, but also indicate the depth of the bottom mud of different layers between each baffle on the sampling box 2. For example, the length of the sampling box 2 is 50 cm. An insertion gap is formed every 5 cm, corresponding to a baffle, and based on the baffle, any soil layer with a minimum interval of 5 cm is formed. It can be seen that based on this device, the precise sampling depth of different layers of bottom mud can be determined.

[0073] Specifically, the scale marking may be presented in various forms, such as scale lines, digital markings, color coding, etc., so that the user can intuitively identify the sampling depth.

[0074] When the device starts working, firstly, the sampling box 2 is embedded in the side of the device cylinder 1, and an air hole is left at the top of the sampling box 2. In the process of the device being pushed toward the bottom mud, the cutter head 12 is started, and the serrated cutter head 12 at the bottom of the device starts to move, which can cut various types of plant fibers and non-plant fibers in the bottom mud layer to prevent the bottom mud from jumping layers and destroying the original layers during the downward push. After the sampling box 2 is pushed to be full, the sealing member 11 is closed to seal the bottom opening of the device. The device is taken out of the bottom mud, and the sampling box 2 is taken out from the side of the cylinder 1 according to the sample needs. The metal baffles are inserted at different depths to accurately separate the different layers of bottom mud. The detachable side panel 22 on the side of the sampling box 2 is disassembled, and the sample bottom mud can be poured out.

[0075] The bottom mud layered sampling device provided by the embodiment of the present invention can cut various plant roots, debris, plant fibers, etc. covering the upper layer of the bottom mud by setting a cutter head 12 at the bottom of the cylinder 1. A baffle is inserted into the insertion slot 21 of the sampling box 2, and the baffle can divide the bottom mud contained in the sampling box 2 into different layers. After that, the side plate 22 is opened to take out the bottom mud in different layers in its original state, thereby improving the accuracy of the sampling result.

[0076] The embodiment of the present invention provides a sediment stratification sampling method. Figure 3 This is a flow chart of a sediment stratification sampling method provided by an embodiment of the present invention, please refer to Figure 3 The method comprises:

[0077] 301. Determine whether the sealing member 11 is in an open state.

[0078] In this step, the sealing member 11 can be opened manually or automatically.

[0079] In an embodiment provided by the present invention, the sealing member 11 comprises multi-jointed movable door panels connected in series, and guide rails 13 are provided on the bottom inner wall and the side walls of the cylinder 1 .

[0080] The door panels are connected in series via hinges to form a structure that can be expanded and contracted. When the door panels are expanded, they cover the bottom opening of the cylinder 1 to seal it; when the door panels are contracted, the bottom opening of the cylinder 1 is opened to allow the cylinder 1 to be filled with bottom mud or to take out a bottom mud sample from the cylinder 1.

[0081] Guide rails 13 are provided on the bottom inner wall and the side walls of the cylinder 1. The guide rails 13 provide guidance and support for the movement of the movable door leaf, ensuring that the door leaf can move smoothly and accurately along a predetermined path.

[0082] When the bottom opening of the cylinder 1 needs to be opened, it is started and drives the movable door sheet to move to one side or roll up along the guide rail 13 to expose the bottom opening of the cylinder 1.

[0083] 302. The moving blade is driven to reciprocate so that the moving blade and the stationary blade rub against each other to cut the attachments on the upper layer of the bottom mud.

[0084] Using a combination of dynamic blades and static blades, the reciprocating motion of the dynamic blade rubs and cuts the attachments on the surface of the bottom mud, such as various plant roots, debris, plant fibers, etc. covering the upper layer of the bottom mud, to ensure the purity of the sampling.

[0085] 303. The moving rod 3 is used to drive the cylinder 1 to be inserted into the bottom mud to be sampled to reach a preset sampling depth.

[0086] By manually or mechanically driving the moving rod 3, the cylinder 1 is steadily inserted into the bottom mud until the preset sampling depth is reached. At this time, the cylinder 1 should remain stable and avoid shaking or tilting.

[0087] 304. Close the sealing member 11.

[0088] When the cylinder 1 reaches the preset depth, the sealing member 11 is immediately closed to prevent the bottom mud from leaking or being contaminated during the removal process.

[0089] 305. Use the moving rod 3 to drive the cylinder 1 to move out of the bottom mud.

[0090] The cylinder 1 is smoothly pulled out from the bottom mud using the moving rod 3 while keeping the sealing member 11 in a closed state.

[0091] 306. Use a baffle to insert into the slot 21 of the sampling box 2, and the baffle divides the extracted bottom mud into different layers.

[0092] An insertion slot 21 is provided in the sampling box 2. A baffle is inserted into the insertion slot 21 from the side of the cylinder 1. The bottom mud sample is divided into different layers by utilizing the physical separation effect of the baffle.

[0093] Since the bottom mud is semi-fluid, the semi-fluid bottom mud at a specific depth can be directly taken out from the side through this layered structure.

[0094] 307. Take out the sampling box 2 from the cylinder 1.

[0095] After the bottom mud is completely removed from the cylinder 1, the sealing member 11 is opened, and the sampling box 2 is taken out from the cylinder 1. The sampling box 2 should contain the bottom mud sample taken from the preset depth.

[0096] 308. Open the side panel 22 and take out the bottom mud located in different layers.

[0097] Finally, the side panels 22 of the sampling box 2 are opened, for example, the side panels 22 may be a tearable film or other forms, and the bottom mud samples located at different layers are taken out for subsequent analysis.

[0098] The bottom mud layered sampling method provided by the embodiment of the present invention can cut various plant roots, debris, plant fibers, etc. covering the upper layer of the bottom mud by setting a cutter head 12 at the bottom of the cylinder 1. A baffle is inserted into the insertion slot 21 of the sampling box 2, and the baffle can divide the bottom mud contained in the sampling box 2 into different layers. After that, the side plate 22 is opened to take out the bottom mud in different layers in its original state, thereby improving the accuracy of the sampling result.

[0099] It should be understood that the term "and / or" in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. A and B can be singular or plural. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship, but it may also indicate an "and / or" relationship. Please refer to the context for specific understanding.

[0100] In the present invention, "at least one" means one or more, and "plurality" means two or more. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single items or plural items. For example, at least one of a, b, or c can mean: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or multiple.

[0101] It should be understood that in various embodiments of the present invention, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

[0102] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A sediment stratification sampling device, characterized in that: The device comprises: A cylinder, wherein the cross section of the cylinder is rectangular, the bottom of the cylinder is open, and the inner wall of the bottom of the cylinder is provided with a pair of seals that can be opened and closed, and a cutter head extends from the end of the cylinder; Wherein, the cutter head comprises a superimposed moving blade and a stationary blade, and both the moving blade and the stationary blade are serrated, and the moving blade can reciprocate and rub against the stationary blade to perform cutting; A sampling box, wherein the bottom of the sampling box has an opening, and the sampling box is detachably embedded in the cylinder, and a plurality of slots for inserting baffles are arranged on the side wall of the sampling box, and at least one detachable side panel is arranged between two adjacent slots; A moving rod is connected to the top of the cylinder and is used to move the cylinder.

2. The sediment stratification sampling device according to claim 1, characterized in that: The device comprises a driving mechanism; The driving mechanism comprises a motor and a transmission member, wherein the motor is arranged on the moving rod, and the motor is connected to the moving blade through the transmission member and drives the moving blade to reciprocate.

3. The sediment stratification sampling device according to claim 2, characterized in that: The moving rod is provided with a handle, the handle is provided with a switch, and the switch is communicatively connected with the motor.

4. The sediment stratification sampling device according to claim 1, characterized in that: The sealing member comprises a multi-jointed movable door sheet, a traction rope and a reset member connected in series, the traction rope connects the movable door sheet and the handle, and guide rails are arranged on the bottom inner wall and the side wall of the cylinder; The reset member can drive the movable door piece to open along the guide rail, and the traction rope can drive the movable door piece to close along the guide rail.

5. The sediment stratification sampling device according to claim 4, characterized in that: The guide rail is arranged in the gap between the cylinder and the sampling box.

6. The sediment stratification sampling device according to claim 1, characterized in that: The cross section of the sampling box is rectangular; A locking piece is arranged on the inner wall of the bottom of the cylinder body for fixing the sampling box.

7. The sediment stratification sampling device according to claim 1, characterized in that: The tops of the sampling box and the cylinder are both provided with air outlets.

8. The sediment stratification sampling device according to claim 1, characterized in that: A limiting plate is arranged on the top of the cylinder, and the size of the limiting plate is larger than the cross-sectional size of the cylinder.

9. The sediment stratification sampling device according to claim 1, characterized in that: The outer wall of the sampling box is provided with scale marks for indicating the sampling depth.

10. A sediment stratification sampling method, characterized in that: The method comprises: Make sure the sealing piece is in the open state; The moving blade is driven to reciprocate, so that the moving blade and the stationary blade rub against each other and cut the attachments on the upper layer of the bottom mud; The moving rod is used to drive the cylinder to be inserted into the bottom mud to be sampled to reach the preset sampling depth; Close the sealing piece; Use a moving rod to drive the cylinder to move out of the bottom mud; Insert a baffle into the slot of the sampling box, and the baffle divides the extracted sediment into different layers; Take the sampling box out of the cylinder; Open the side panels and take out the bottom mud located in different layers.

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