Automatic sampler for undisturbed bottom mud sediment

Abstract

The invention discloses an automatic sampler for undisturbed bottom mud sediment, and relates to the technical field of environmental analysis, the automatic sampler is characterized in that the bottom of a cylinder is provided with an opening, and a support plate is horizontally erected in the cylinder; a plurality of sampling bottles are sleeved in the cylinder body, and sampling assemblies are arranged in the sampling bottles; the multiple sets of extrusion mechanisms are arranged between the supporting plate and the multiple sampling bottles, the extrusion mechanisms are used for downwards extruding the sampling bottles to enable the sampling bottles to penetrate out of the openings, each extrusion mechanism comprises a telescopic piece and a flexible connecting piece, each telescopic piece is provided with a fixed end and a free end, and the fixed ends of the telescopic pieces are arranged at the bottom of the supporting plate; the free end of the telescopic piece is connected with one end of the flexible connecting piece, and the other end of the flexible connecting piece is connected with the sampling bottle. The sediment sampling device has the advantages that sediment at different positions can be sampled at one time, the sampling efficiency is improved, data obtained by sampling the sediment at different positions and detecting a plurality of samples can be more representative, and various detected index data are more accurate and real.

Description

Technical Field

[0001] The invention relates to the technical field of environmental analysis, and in particular to an automatic sampler for undisturbed bottom mud sediments. Background Art

[0002] In the process of river and lake pollution control, sediment pollution control is one of the main difficulties and a common environmental problem, especially in the rivers and lakes in the northwest region (such as Shanxi, Shaanxi, Gansu, etc.). The characteristics of rivers in the northwest region are small water volume, large seasonal changes in water level, high sand content, mainly seasonal rivers, and generally dry in winter, and sediment pollution is relatively serious. There is a dynamic balance of absorption and release between water bodies and sediments. When there is serious pollution in the water body, some pollutants can enter the sediment through precipitation, adsorption, etc.; when the pollution caused by external sources is controlled, various organic and inorganic pollutants accumulated in the sediment re-enter the overlying water body through physical, chemical, and biological exchanges with the overlying water body, becoming a secondary pollution source affecting the water quality of the water body.

[0003] When sampling and testing the original sediment, it is necessary to collect the sediment first. Usually, the original sediment sampling device is lowered to the bottom of the river or lake, and then the sediment is sampled and then the sampled sediment is tested. At present, the existing original sediment sampling and testing device includes a sampling tube and a suction structure. When sampling, the sampling tube needs to be placed at the position to be sampled, and then the suction structure is started to suck the sediment sample into the sampling tube. However, this sampling method has certain limitations, because it can only achieve one-time sampling and testing at one position when sampling the original sediment, and cannot sample multiple positions at the same time. The various index data of this single-point one-time sampling test may not be completely representative or even distorted. Therefore, using the existing original sediment sampling and testing device to obtain more extensive and representative index data results requires multiple sampling and testing at different positions, which is inefficient and time-consuming. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides an automatic sampler for undisturbed sediment, which can sample sediments at different positions at one time, thereby improving the sampling efficiency.

[0005] The present invention provides an automatic sampler for undisturbed sediment, comprising:

[0006] A cylinder having an opening at the bottom and a support plate horizontally arranged inside the cylinder;

[0007] A plurality of sampling bottles are sleeved in the cylinder, wherein the sampling bottles are provided with sampling components;

[0008] A plurality of extrusion mechanisms are arranged between the support plate and the plurality of sampling bottles, the extrusion mechanisms are used to squeeze the sampling bottles downward so that the sampling bottles pass through the openings, the extrusion mechanisms include a telescopic member and a flexible connecting member, the telescopic member has a fixed end and a free end, the fixed end of the telescopic member is arranged at the bottom of the support plate, the free end of the telescopic member is connected to one end of the flexible connecting member, and the other end of the flexible connecting member is connected to the sampling bottle.

[0009] Preferably, the cylinder comprises:

[0010] A first tube, the top end of which is closed and the bottom end is open, and the support plate is located in the first tube;

[0011] The second tube is arranged at the bottom end of the first tube, the second tube is hemispherical, and the opening is opened at the bottom of the second tube.

[0012] Preferably, the plurality of sampling bottles are arranged in a circular array at the bottom of the support plate, and a plurality of guide strips are provided on the inner wall of the second tube, the guide strips are arc-shaped, and the guide strips are arranged along the height direction of the second tube, and the plurality of guide strips are arranged in a circular array on the inner wall of the second tube, and the plurality of guide strips respectively correspond to the positions of the plurality of sampling bottles, and the guide strips are used to guide the sampling bottles.

[0013] Preferably, the telescopic member is a hydraulic rod, and the flexible connecting member comprises:

[0014] A plurality of fixing rings are connected head to tail in sequence, and two adjacent fixing rings are hinged, and the fixing rings at both ends are respectively connected to the free end of the hydraulic rod and the top end of the sampling bottle, and the plurality of fixing rings are tubular.

[0015] Preferably, two adjacent fixing rings are connected by a plurality of plastic metal wires, two ends of the plastic metal wires are respectively connected to the ends of the two fixing rings, and the plastic metal wires are spiral-shaped.

[0016] Preferably, a sampling hole is provided at the bottom of the sampling bottle, and the sampling assembly comprises:

[0017] Two support rods, symmetrically arranged at the free ends of the hydraulic rod;

[0018] The piston is sleeved in the sampling bottle, the circumference of the piston abuts against the inner wall of the sampling bottle, and the piston is slidably connected to the sampling bottle. Before sampling, the piston is located at the bottom of the sampling bottle.

[0019] Preferably, the diameter of the opening is larger than the diameter of the sampling bottle, and a clamping structure is provided at the opening, and the clamping structure is used to clamp the sampling bottle, and the clamping structure includes:

[0020] Two telescopic rods are symmetrically arranged on the side walls of the opening, and the two telescopic rods are arranged horizontally;

[0021] Two clamping blocks are respectively arranged at one end of the two telescopic rods away from the opening, and the opposite sides of the two clamping blocks are arc-shaped;

[0022] A spring is sleeved on the telescopic rod, one end of the spring is fixed to the side wall of the opening, and the other end of the spring is fixed to the side wall of the clamping block.

[0023] Preferably, it also includes:

[0024] Two first magnets are respectively arranged on opposite sides of the two clamping blocks;

[0025] Two second magnets are symmetrically arranged on the side wall of the sampling bottle, and the two second magnets are magnetically attracted to the two first magnets respectively.

[0026] Preferably, a probe rod is vertically provided on the top of the first tube, and a plurality of the probe rods are provided, and the plurality of the probe rods are threadedly connected in sequence end to end.

[0027] Compared with the prior art, the present invention discloses an automatic sampler for undisturbed sediment, which has the following beneficial effects:

[0028] Firstly, the device sets a plurality of sampling bottles in the cylinder, each of which can be used for sampling, and can sample the bottom mud at different positions at one time, thereby improving the sampling efficiency. At the same time, by sampling the bottom mud at different positions, the data obtained by obtaining multiple samples for detection can also be more representative, and the data of various indicators detected are also more accurate and true. Secondly, multiple groups of squeezing mechanisms can be adjusted separately to squeeze the sampling bottles that need to be sampled downward, so that the sampling bottles pass through the opening for sampling. When in use, the sampling bottle can be pushed out of the opening by the squeezing mechanism, and then the bottom mud can be sampled by the sampling assembly set in the sampling bottle. At the same time, the squeezing mechanism includes a telescopic part, which can realize the pushing out of the sampling bottle from the opening and can be extended to the position where the sampling depth is required. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. 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 paying creative work.

[0030] Figure 1 It is a structural schematic diagram of the present invention;

[0031] Figure 2 It is a structural schematic diagram of the extrusion mechanism of the present invention;

[0032] Figure 3 For the present invention Figure 2 A schematic diagram of the enlarged structure at A in the middle;

[0033] Figure 4 It is a structural schematic diagram of the clamping structure of the present invention.

[0034] The meaning of each number in the figure: 1-cylinder, 2-sampling bottle, 3-squeezing mechanism, 4-probe rod, 5-clamping structure, 11-opening, 12-first cylinder, 13-second cylinder, 14-guide strip, 15-support plate, 21-sampling hole, 22-support rod, 23-piston, 31-telescopic member, 32-flexible connecting member, 321-fixing ring, 322-plastic metal wire, 51-telescopic rod, 52-clamping block, 53-spring, 54-first magnet, 55-second magnet. DETAILED DESCRIPTION

[0035] A specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific implementation.

[0036] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the technical solutions of 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 a limitation on the present invention.

[0037] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the term "connection" 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 a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0038] In addition, in the description of the present invention, "plurality" means two or more than two. The terms "first" and "second" are used for descriptive purposes only and should not be understood to imply or suggest relative importance or implicitly indicate the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0039] Example 1

[0040] The embodiment of the present invention provides an automatic sampler for undisturbed sediments. Figure 1 As shown, it includes: a barrel 1, a sampling bottle 2, and a squeezing mechanism 3. An opening 11 is provided at the bottom of the barrel 1, and the opening 11 is provided for easy sampling. A support plate 15 is horizontally arranged inside the barrel 1, and the side wall of the support plate 15 is fixed to the inner wall of the barrel 1; a plurality of sampling bottles 2 are sleeved in the barrel 1, and a sampling assembly is provided inside the sampling bottle 2. When sampling, the sampling bottle 2 extends out of the opening 11, and the sampling assembly is used to take samples into the sampling bottle 2; a plurality of groups of squeezing mechanisms 3 are arranged between the support plate 15 and the plurality of sampling bottles 2, and the plurality of groups of squeezing mechanisms 3 correspond to the plurality of sampling bottles 2 one by one. The squeezing mechanism 3 is used to squeeze the sampling bottle 2 downward so that the sampling bottle 2 passes through the opening 11, which is convenient for sampling the sampling bottle 2. The squeezing mechanism 3 includes a telescopic member 31 and a flexible connecting member 32, and the telescopic member 31 has The fixed end and the free end, the telescopic member 31 has a telescopic function, the fixed end of the telescopic member 31 is set at the bottom of the support plate 15, the free end of the telescopic member 31 is connected to one end of the flexible connector 32, and the other end of the flexible connector 32 is connected to the sampling bottle 2. The flexible connector 32 is used to connect the telescopic member 31 and the sampling bottle 2, and can guide the moving direction of the sampling bottle 2 so that the sampling bottle 2 can pass through the opening 11. Because multiple sampling bottles 2 are required to pass through the opening 11, the opening 11 is located in the middle in this embodiment, and the telescopic member 31 can push the sampling bottle 2 downward, and the flexible connector 32 can change the direction of the sampling bottle 2 so that the sampling bottle 2 moves toward the opening 11. The device firstly arranges multiple sampling bottles 2 in the barrel 1, and each sampling bottle 2 can be sampled. Secondly, multiple groups of extrusion mechanisms 3 can be adjusted separately to squeeze the sampling bottles 2 that need to be sampled downward so that the sampling bottles 2 pass through the opening 11 for sampling. When in use, the entire device is placed at the bottom of a river or lake, so that the squeezing mechanism 3 works, the telescopic member 31 stretches, and the sampling bottle 2 moves toward the opening 11 until the sampling bottle 2 passes through the opening 11. The sampling assembly is used to sample into the sampling bottle 2. At the same time, the telescopic member 31 can also be set to push the sampling bottle 2 to the position where the sampling depth is required. The device sets multiple sampling bottles 2 in the barrel 1, and can sample the bottom mud at different positions at one time, thereby improving the sampling efficiency. At the same time, by sampling the bottom mud at different positions, the data obtained by obtaining multiple sample tests can also be more representative, and the data of various indicators detected are also more accurate and true.

[0041] like Figure 1As shown, further, in this embodiment, the barrel 1 includes: a first barrel 12 and a second barrel 13. The top of the first barrel 12 is closed, the bottom is open, and the support plate 15 is located in the first barrel 12; the second barrel 13 is arranged at the bottom of the first barrel 12, and the second barrel 13 is connected with the first barrel 12 to form an integrated structure, the second barrel 13 is hemispherical, and the opening 11 is opened at the bottom of the second barrel 13, and the opening 11 is located in the middle. In this embodiment, the bottom of the barrel 1 is set to be hemispherical, and when the squeezing mechanism 3 squeezes the sampling bottle 2 that needs to be sampled downward, the hemispherical inner wall of the second barrel 13 can guide the sampling bottle so that the sampling bottle 2 passes through the opening 11 for sampling.

[0042] In order to better enable the sampling bottle 2 to accurately pass through the opening 11 for sampling, further, multiple sampling bottles 2 are arranged in a circular array at the bottom of the support plate 15, and multiple guide strips 14 are provided on the inner wall of the second tube 13. The guide strips 14 are arc-shaped, because the guide strips 14 are arranged on the inner wall of the second tube 13, consistent with the arc shape of the inner wall of the second tube 13, and the guide strips 14 are arranged along the height direction of the second tube 13. Multiple guide strips 14 are arranged on the inner wall of the second tube 13 in a circular array. The multiple guide strips 14 correspond to the positions of the multiple sampling bottles 2 respectively. The guide strips 14 are used to guide the sampling bottles 2. The guide strips 14 and the sampling bottles 2 corresponds to two settings. One is that the guide bar 14 is located below the sampling bottle 2. When the squeezing mechanism 3 squeezes the sampling bottle 2 to be sampled downward, the side wall of the sampling bottle 2 can accurately pass through the opening 11 along the direction of the guide bar 14 for sampling. In addition, the guide bar 14 in this embodiment can also be set at a position where the position of the sampling bottle 2 corresponds to the position between two adjacent guide bars 14. When the squeezing mechanism 3 squeezes the sampling bottle 2 to be sampled downward, the side wall of the sampling bottle 2 is clamped between the two adjacent guide bars 14, thereby guiding the sampling bottle 2 so that the sampling bottle 2 passes through the opening 11 for sampling.

[0043] This embodiment provides a specific method of a telescopic member 31 and a flexible connecting member 32, such as Figure 2 As shown, further, the telescopic member 31 is a hydraulic rod, and the telescopic member 31 can also be an electric telescopic rod, an electric cylinder or other components with electric telescopic function, and the flexible connector 32 includes: a plurality of fixed rings 321 connected end to end in sequence, and two adjacent fixed rings 321 are hinged, and two adjacent fixed rings 321 can rotate, and the fixed rings 321 located at both ends are respectively connected to the free end of the hydraulic rod and the top of the sampling bottle 2, and the plurality of fixed rings 321 are tubular. The flexible connector 32 in this embodiment is connected by a plurality of fixed rings 321, and the angles between the plurality of fixed rings 321 can be changed, so that the sampling bottle 2 can be moved to the opening 11 and extended out of the opening 11 for sampling. Among them, the plurality of fixed rings 321 in this embodiment are tubular, which can increase the connection area with the telescopic member 31 and the sampling bottle 2, and the supporting effect is better.

[0044] like Figure 3 As shown, further, two adjacent fixing rings 321 are connected by a plurality of plastic wires 322, and the plastic wires 322 have certain elasticity and plasticity, so that the sampling bottle 2 can be deformed to a certain extent according to the shape of the inner wall of the second tube 13 when it moves toward the opening 11, and can return to its original shape after the sampling is completed, and the two ends of the plastic wire 322 are respectively connected to the ends of the two fixing rings 321, and the plastic wire 322 is spiral, and the spiral shape is also set to be able to be deformed to a certain extent during use. The plastic wire 322 can be made of iron wire, which has certain ductility.

[0045] Furthermore, a probe rod 4 is vertically provided on the top of the first tube 12, and a plurality of probe rods 4 are provided, and the plurality of probe rods 4 are threadedly connected in sequence. The number of probe rods 4 can be adjusted according to the depth of the river or lake to be detected. When in use, a probe rod 4 of sufficient length is connected, so that the device can be manually placed at a suitable position, and it is also convenient to move to a desired position when sampling at different positions, which is more convenient to use.

[0046] Example 2

[0047] As a further improvement on Example 1, further, a sampling hole 21 is provided at the bottom of the sampling bottle 2, and the sample enters the sampling bottle 2 through the sampling hole 21. This embodiment provides a specific structure of a sampling component, such as Figure 2 As shown, the sampling assembly includes: a support rod 22 and a piston 23. The two support rods 22 are symmetrically arranged at the free end of the hydraulic rod; the piston 23 is sleeved in the sampling bottle 2, and the circumference of the piston 23 abuts against the inner wall of the sampling bottle 2, and the piston 23 is slidably connected to the sampling bottle 2, and the piston 23 can slide in the sampling bottle 2. Before sampling, the piston 23 is located at the bottom of the sampling bottle 2. The working principle of the sampling assembly in this embodiment: utilizing the telescopic function of the hydraulic rod, driving the support rod 22 to drive the piston 23 to slide in the sampling bottle 2, so as to achieve the suction of the sample into the sampling bottle 2. The hydraulic rod of this device can, on the one hand, squeeze the sampling bottle 2 downward through the opening 11, and on the other hand, can drive the piston 23 to slide in the sampling bottle 2 to suction the sample. Among them, when the hydraulic rod realizes squeezing the sampling bottle 2 downward, the sampling bottle 2 is not fixed, and the hydraulic rod will not drive the support rod 22 downward when stretched, but realizes the effect of squeezing the entire sampling bottle 2 downward; when the hydraulic rod realizes driving the piston 23 to slide in the sampling bottle 2, the sampling bottle 2 is stuck at the opening 11. At this time, the extension and retraction of the hydraulic rod drives the lifting and lowering of the support rod 22 instead of the lifting and lowering of the entire sampling bottle 2. At the same time, the plastic metal wire 322 is spiral. When the hydraulic rod contracts and drives the support rod 22 to drive the piston 23 to slide upward in the sampling bottle 2, the plastic metal wire 322 is stretched, and it will not drive the sampling bottle 2 to move.

[0048] In order to further limit the sampling bottle 2 at the opening 11 during sampling, further, the diameter of the opening 11 is larger than the diameter of the sampling bottle 2, so that the sampling bottle 2 can pass through the opening 11. A clamping structure 5 is provided at the opening 11, and the clamping structure 5 is used to clamp the sampling bottle 2. Figure 4 As shown, the clamping structure 5 includes: a telescopic rod 51 and a clamping block 52. The two telescopic rods 51 are symmetrically arranged on the side wall of the opening 11, and the two telescopic rods 51 are arranged horizontally; the two clamping blocks 52 are respectively arranged at one end of the two telescopic rods 51 away from the opening 11, and the opposite side of the two clamping blocks 52 is arc-shaped, matching the shape of the side wall of the sampling bottle 2; a spring 53 is sleeved on the telescopic rod 51, one end of the spring 53 is fixed to the side wall of the opening 11, and the other end of the spring 53 is fixed to the side wall of the clamping block 52. The clamping structure 5 of this embodiment uses the elastic force of the spring 53 to make the telescopic rod 51 extend and retract to drive the two clamping blocks 52 to clamp the side wall of the sampling bottle 2, so as to avoid the hydraulic rod from contracting and driving the sampling bottle 2 to move during sampling.

[0049] Among them, other structures of this embodiment are consistent with those of embodiment 1, and are just optimizations made to embodiment 1.

[0050] Example 3

[0051] As a further improvement scheme based on Example 2, in order to better achieve the function of clamping the sampling bottle 2, it also includes: a first magnet 54 and a second magnet 55. The two first magnets 54 are respectively arranged on the opposite side of the two clamping blocks 52, that is, the side in contact with the sampling bottle 2; the two second magnets 55 are symmetrically arranged on the side wall of the sampling bottle 2, and the two second magnets 55 are respectively magnetically attracted to the two first magnets 54. When the sampling bottle 2 passes through the opening 11, the first magnets 54 on the two clamping blocks 52 are attracted to the second magnets 55 on the side wall of the sampling bottle 2 to achieve the clamping and fixing of the sampling bottle 2. In order to facilitate the separation of the first magnet 54 and the second magnet 55, one of the first magnet 54 and the second magnet 55 can be an electromagnet, which can be attracted after the electromagnet is energized, and can be easily separated after the electromagnet is powered off, so that the sampling bottle 2 can be retracted into the first cylinder 11 after the sampling is completed, so as to sample at the next position.

[0052] Among them, the other structures of this embodiment are consistent with those of Embodiment 2, and are just optimizations made to Embodiment 2.

[0053] The advantages of the present invention are that, firstly, a plurality of sampling bottles are arranged in the cylinder body of the device, and each sampling bottle can be used for sampling, and the bottom mud at different positions can be sampled at one time, thereby improving the sampling efficiency. At the same time, by sampling the bottom mud at different positions, the data obtained by obtaining multiple samples for detection can also be more representative, and the data of various indicators detected are also more accurate and true. Secondly, multiple groups of squeezing mechanisms can be adjusted separately to squeeze the sampling bottles that need to be sampled downward, so that the sampling bottles pass through the opening for sampling. When in use, the sampling bottle can be pushed out of the opening by the squeezing mechanism, and then the bottom mud can be sampled by the sampling assembly arranged in the sampling bottle. At the same time, the squeezing mechanism includes a telescopic member, which can realize the pushing out of the sampling bottle from the opening and can be extended to the position where the sampling depth is required.

[0054] The above disclosures are only several specific embodiments of the present invention. However, the embodiments of the present invention are not limited thereto. Any changes that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. An automatic sampler for undisturbed sediment, characterized in that: include: A cylinder (1) having an opening (11) at its bottom, and a support plate (15) horizontally arranged inside the cylinder (1); A plurality of sampling bottles (2) are mounted inside the barrel (1), wherein the sampling bottles (2) are provided with sampling components; A plurality of squeezing mechanisms (3) are arranged between the support plate (15) and the plurality of sampling bottles (2). The squeezing mechanisms (3) are used to squeeze the sampling bottles (2) downward so that the sampling bottles (2) pass through the openings (11). The squeezing mechanisms (3) include a telescopic member (31) and a flexible connecting member (32). The telescopic member (31) has a fixed end and a free end. The fixed end of the telescopic member (31) is arranged at the bottom of the support plate (15). The free end of the telescopic member (31) is connected to one end of the flexible connecting member (32), and the other end of the flexible connecting member (32) is connected to the sampling bottle (2).

2. The automatic sampler for undisturbed sediment according to claim 1, characterized in that: The cylinder (1) comprises: A first tube (12) having a closed top and an open bottom, wherein the support plate (15) is located inside the first tube (12); The second tube (13) is arranged at the bottom end of the first tube (12); the second tube (13) is hemispherical, and the opening (11) is opened at the bottom of the second tube (13).

3. The automatic sampler for undisturbed sediment according to claim 2, characterized in that: The plurality of sampling bottles (2) are arranged in a circular array at the bottom of the support plate (15); a plurality of guide bars (14) are provided on the inner wall of the second tube (13); the guide bars (14) are arc-shaped and arranged along the height direction of the second tube (13); the plurality of guide bars (14) are arranged in a circular array on the inner wall of the second tube (13); the plurality of guide bars (14) respectively correspond to the positions of the plurality of sampling bottles (2); and the guide bars (14) are used to guide the sampling bottles (2).

4. The automatic sampler for undisturbed sediment according to claim 2, characterized in that: The telescopic member (31) is a hydraulic rod, and the flexible connecting member (32) comprises: A plurality of fixing rings (321) are connected end to end in sequence, and two adjacent fixing rings (321) are hinged, and the fixing rings (321) located at both ends are respectively connected to the free end of the hydraulic rod and the top end of the sampling bottle (2), and the plurality of fixing rings (321) are tubular.

5. The automatic sampler for undisturbed sediment according to claim 4, characterized in that: Two adjacent fixing rings (321) are connected via a plurality of plastic metal wires (322), two ends of the plastic metal wires (322) are respectively connected to the ends of the two fixing rings (321), and the plastic metal wires (322) are spiral-shaped.

6. The automatic sampler for undisturbed sediment according to claim 5, characterized in that: The bottom of the sampling bottle (2) is provided with a sampling hole (21), and the sampling assembly comprises: Two support rods (22) are symmetrically arranged at the free ends of the hydraulic rod; The piston (23) is mounted in the sampling bottle (2). The circumference of the piston (23) abuts against the inner wall of the sampling bottle (2). The piston (23) is slidably connected to the sampling bottle (2). Before sampling, the piston (23) is located at the bottom of the sampling bottle (2).

7. The automatic sampler for undisturbed sediment according to claim 6, characterized in that: The diameter of the opening (11) is greater than the diameter of the sampling bottle (2). A clamping structure (5) is provided at the opening (11). The clamping structure (5) is used to clamp the sampling bottle (2). The clamping structure (5) comprises: Two telescopic rods (51) are symmetrically arranged on the side wall of the opening (11), and the two telescopic rods (51) are arranged horizontally; Two clamping blocks (52) are respectively arranged at one end of the two telescopic rods (51) away from the opening (11), and the opposite sides of the two clamping blocks (52) are arc-shaped; A spring (53) is sleeved on the telescopic rod (51), one end of the spring (53) is fixed to the side wall of the opening (11), and the other end of the spring (53) is fixed to the side wall of the clamping block (52).

8. The automatic sampler for undisturbed sediment according to claim 7, characterized in that: Also includes: Two first magnets (54) are respectively arranged on opposite sides of the two clamping blocks (52); Two second magnets (55) are symmetrically arranged on the side wall of the sampling bottle (2), and the two second magnets (55) are magnetically attracted to the two first magnets (54) respectively.

9. The automatic sampler for undisturbed sediment according to claim 2, characterized in that: A probe rod (4) is vertically arranged at the top of the first tube (12), and a plurality of the probe rods (4) are provided, and the plurality of the probe rods (4) are threadedly connected in sequence end to end.

Images