CN218067147U

CN218067147U - Sediment sampler

Info

Publication number: CN218067147U
Application number: CN202220931037.6U
Authority: CN
Inventors: 吴三亮
Original assignee: Beijing Zhonghe Technology Co ltd
Current assignee: Beijing Zhonghe Technology Co ltd
Priority date: 2022-04-21
Filing date: 2022-04-21
Publication date: 2022-12-16
Anticipated expiration: 2032-04-21

Abstract

The utility model relates to a submarine deposit sampling tool technical field discloses a deposit sample thief. The sediment sampler comprises a sampling assembly, a force application assembly and a supporting assembly, wherein the sampling assembly comprises a sampling pipe, a connecting seat and a sealing valve cover, one end of the sampling pipe is inserted into the connecting seat, an overflow hole communicated with the sampling pipe is formed in the connecting seat, and the sealing valve cover is movably arranged in the overflow hole; the force application assembly comprises a guide rod and a heavy hammer, one end of the guide rod is connected to the connecting seat, the other end of the guide rod is connected with the sampling traction rope, the heavy hammer sleeve is arranged on the guide rod and connected with the counterweight traction rope, the counterweight traction rope can pull the heavy hammer to move along the guide rod to hammer the connecting seat, and the support assembly sleeve is arranged outside the sampling pipe and is configured to support the sampling pipe to enable the sampling pipe to be vertically arranged at the bottom of the water. The sediment sampler has the advantages of simple structure, convenience in carrying, suitability for different sampling environments, better universality and capability of acquiring high-quality, sufficient and undisturbed sediment samples.

Description

Sediment sampler

Technical Field

The utility model relates to a submarine deposit sampling instrument technical field, concretely relates to deposit sample thief.

Background

The underwater sediments are important samples for researching climate and environmental change rules, and contain a large amount of information in aspects of physics, chemistry, biology and the like, so if high-quality, complete and undisturbed sediment samples can be obtained, the underwater sediments have important significance for researching heavy metal pollution, biological disturbance, nutrient salt flux, denitrification, climate and environmental change rules and the like in a specific period. Therefore, it is particularly important to analyze the deposit from underwater in a perfect collection manner.

While there are many types of sediment samplers on the market, there are fewer types of column samplers. Moreover, the existing columnar sampler can only meet the sample collection under a single sampling condition, and has obvious inadaptation to the sample collection under a complex condition. For example, the existing sampler is heavy, the detachability of accessories is poor, and the existing sampler is inconvenient to carry, and the field sampling environment is mostly field paths or mountain paths, so that the labor burden is increased by carrying the sampler of the type. Secondly, the existing sampler has poor closing tightness in the sampling process, has large disturbance on the sample, can only collect surface sediment samples and soft sludge sediments, and greatly reduces the sampling effect on harder lake sediments. In addition, under the conditions that the existing collector faces large water flow, thin sediment and large fluctuation of the underwater topography, the sampler is difficult to stand on the water bottom, so that an effective sample is difficult to collect.

Therefore, it is desirable to provide a sediment sampler to solve the above problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a deposit sample thief, simple structure, convenient to carry is applicable to different sampling environment, and the commonality is better, and the homoenergetic gathers high-quality, sufficient, the deposit sample of no disturbance.

In order to achieve the purpose, the utility model discloses a following technical scheme realizes:

a sediment sampler comprising:

the sampling assembly comprises a sampling pipe, a connecting seat and a sealing valve cover, wherein one end of the sampling pipe is inserted into the connecting seat, the connecting seat is provided with an overflow hole communicated with the sampling pipe, and the sealing valve cover is movably arranged in the overflow hole;

the force application assembly comprises a guide rod and a heavy hammer, one end of the guide rod is connected with the connecting seat, the other end of the guide rod is connected with a sampling traction rope, the heavy hammer is sleeved on the guide rod and is connected with a counterweight traction rope, and the counterweight traction rope can pull the heavy hammer to move along the guide rod so as to hammer the connecting seat;

the supporting component is sleeved outside the sampling pipe and is configured to support the sampling pipe so that the sampling pipe can be vertically arranged at the water bottom.

As a preferable scheme of the sediment sampler, the support assembly comprises a fixing member and a plurality of support members, the fixing member is sleeved outside the sampling pipe, the plurality of support members are arranged on the fixing member at intervals along the circumferential direction of the sampling pipe, and the plurality of support members can be inserted into soil.

As a preferable scheme of the sediment sampler, the stabilizing piece comprises a first part and a second part, and the first part and the second part are connected in a buckling mode to be sleeved outside the sampling pipe.

As a preferable scheme of the sediment sampler, the heavy hammer comprises a first hammer body and a second hammer body, the axes of the first hammer body and the second hammer body are coincident, and the first hammer body and the second hammer body are detachably connected.

As a preferable aspect of the sediment sampler, the connection holder includes:

one end of the guide rod is connected with the force bearing part;

the supporting columns are arranged on one side, away from the guide rod, of the bearing part at intervals along the circumferential direction of the bearing part;

the connecting seat body is connected with one ends, far away from the bearing part, of the supporting columns, the sampling pipes are inserted into the connecting seat body, and the overflow holes are formed in the connecting seat body.

As a preferable scheme of the sediment sampler, a sealing gasket is arranged between the sampling pipe and the connecting seat body.

As a preferred scheme of deposit sample thief, the bottom of connecting seat body is provided with the clamp, the clamp cover is located outside the sampling tube, the side of clamp is provided with the mounting hole, and the fastener is worn to locate in the mounting hole with the sampling tube lock in on the connecting seat body.

As a preferable scheme of the sediment sampler, the bottom surface of the sealing valve cover is provided with a sealing ring.

As a preferable mode of the sediment sampler, the aperture of the overflow hole is larger than or equal to the aperture of the sampling pipe.

As a preferable scheme of the sediment sampler, an inner membrane is arranged in the sampling pipe.

The beneficial effects of the utility model are that:

the utility model provides a deposit sample thief, simple structure, convenient to carry. When the connecting seat takes the sampling pipe to descend in water, the sealing valve cover automatically rises to be opened by depending on the floating of water flow, the water flow passes through the overflow hole, so that the sediment smoothly enters the sampling pipe, when the connecting seat takes the sampling pipe full of the sediment to rise, the sealing valve cover automatically falls to be closed, the overflow hole is sealed, the upper part in the sampling pipe forms a negative pressure state, and thus the sediment cannot fall out of the sampling pipe. Secondly, through receiving and releasing the counter weight haulage rope, can pull the weight and rise along the guide arm and descend again in order to strike the connecting seat for the sample cell stretches into the degree of depth of deposit bigger, and the deposit of gathering is more sufficient. In addition, through establishing at the sampling pipe overcoat and supporting group's price, can support so that the sampling pipe is the submarine is located to the sampling pipe is set up perpendicularly to the collection of deposit thing sample under the adaptation complex environment. The sediment sampler has good universality and can collect high-quality, sufficient and undisturbed sediment samples.

Drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly and easily, the drawings required to be used in the embodiments or the prior art descriptions will be briefly introduced below, and the drawings described below are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a sediment collector provided by an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a weight according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a connection seat according to an embodiment of the present invention;

fig. 4 is a front view of a connection seat provided by an embodiment of the present invention;

FIG. 5 isbase:Sub>A cross-sectional view taken at A-A of FIG. 4;

fig. 6 is a schematic structural diagram of a support assembly according to an embodiment of the present invention.

In the figure:

1. a sampling component; 11. a sampling tube; 12. a connecting seat; 121. a force bearing member; 122. a support post; 123. a connecting seat body; 1231. an overflow hole; 1232. a limiting hole; 1233. a housing hole; 124. clamping a hoop; 13. sealing the valve cover; 14. a seal ring; 15. a sealing gasket;

2. a force application assembly; 21. a guide bar; 22. a weight dropper; 221. a first hammer body; 222. a second hammer body;

3. a support assembly; 31. a stabilizing member; 32. a support member.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature "on," "above" and "over" the second feature may include the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used in the orientation or positional relationship shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to be limiting.

The embodiment provides a sediment sampler, which belongs to a columnar sampler and is used for collecting underwater sediment samples of land water bodies (lakes, reservoirs, riverways and the like). According to the difference of water content and porosity, the sediment can be divided into floating mud, flowing mud, silt and mucky soil, and the sediment collector is suitable for all. Proved by verification, the sediment sampler is suitable for water depth which can reach 150 meters at most.

Referring to fig. 1, the sediment sampler provided in this embodiment includes a sampling assembly 1, a force application assembly 2 and a support assembly 3, the sampling assembly 1 includes a sampling tube 11, a connecting seat 12 and a sealing valve cover 13 (not shown in fig. 1), one end of the sampling tube 11 is inserted into the connecting seat 12, an overflow hole 1231 communicated with the sampling tube 11 is provided on the connecting seat 12, and the sealing valve cover 13 is movably disposed in the overflow hole 1231; force application component 2 includes guide arm 21 and weight 22, and the one end of guide arm 21 is connected in connecting seat 12, and the sample haulage rope is connected to the other end, and weight 22 cover is located on the guide arm 21 and is connected the counter weight haulage rope, and the counter weight haulage rope can pull weight 22 and remove with hammering connecting seat 12 along

guide arm

21, and 3 covers of supporting component locate sampling pipe 11 outside and be configured as and support so that sampling pipe 11 sets up perpendicularly at the bottom.

The sediment sampler provided by the embodiment has a simple structure and is convenient to carry. When the connecting base 12 takes the sampling tube 11 to descend in water, the sealing valve cover 13 automatically rises and opens by means of the floating of water flow, the water flow passes through the overflow hole 1231, deposits smoothly enter the sampling tube 11, when the connecting base 12 takes the sampling tube 11 full of deposits to ascend, the sealing valve cover 13 automatically descends and closes, the overflow hole 1231 is sealed, the upper part of the sampling tube 11 forms a negative pressure state, and therefore the deposits cannot fall out of the sampling tube 11. Secondly, by retracting and releasing the counterweight traction rope, the counterweight 22 can be dragged to ascend along the guide rod 21 and then descend to impact the connecting seat 12, so that the length of the sample tube extending into the sediment is larger, and the collected sediment is more sufficient. In addition, through establishing support group price at sampling pipe 11 overcoat, can support sampling pipe 11 so that sampling pipe 11 sets up perpendicularly and locates subaquely to can adapt to the collection of deposit thing sample under the complex environment. The sediment sampler has good universality and can collect high-quality, sufficient and undisturbed sediment samples.

In this embodiment, the sampling tube 11 is a cylindrical structure with openings at two ends, the opening at the upper end is inserted into the connecting base 12 and is communicated with the overflow hole 1231, and the opening at the lower end is used for being inserted into the sediment at the bottom of the water. It should be noted that the diameter and height of the sampling tube 11 are not limited herein, and may be adaptively selected according to actual requirements, for example, the sampling depth for floating mud, flowing mud and silt is 3 meters, and the sampling depth for mucky soil is 20 cm to 30 cm, and the diameter of the sampling tube 11 may be changed by changing the installation aperture of the connecting seat 12.

Optionally, an inner membrane is provided within the sampling tube 11. When the sediment of sampling is mucky soil, its water content is very low, and the purpose of sample lies in studying the pollution condition, needs install the inner membrance in sampling pipe 11 this moment to guarantee that the sediment sample can take out fast, avoids the adhesion. Preferably, the inner film is a plastic film which is convenient to obtain.

Further, as shown in fig. 2, the weight 22 includes a first weight 221 and a second weight 222, the axes of which coincide with each other, and the first weight 221 and the second weight 222 are detachably connected. The first hammer 221 and the second hammer 222 have different weights and provide different impact forces, and can be fixed by screws. The first hammer 221 and the second hammer 222 may be used alone or together after being fixed, and may be adaptively selected according to a sample collection depth.

Preferably, with continued reference to fig. 2, the weight 22 is provided with a hanging ring, the hanging ring is connected with a counterweight traction rope, and the weight 22 moves up and down along the guide rod 21 by repeatedly lifting and releasing the counterweight traction rope, so as to hammer the connecting seat 12, and the sampling tube 11 is inserted into the underwater sediment.

Further, as shown in fig. 1, one end of the guide rod 21 is screwed to the connection seat 12, and the other end is provided with a limit step, the diameter of the limit step is larger than that of the guide rod 21, so as to limit the position of the weight 22 and prevent the weight 22 from slipping. And the limiting step is provided with a lifting ring for connecting a sampling traction rope.

Preferably, the guide rod 21 can be set up to integral type or many guide rods 21 concatenation together according to actual need, and integral type guide rod length is shorter, and when the bed mud was thick or the water depth exceeded 15 meters, can select integral type guide rod, guide rod 21 and sample haulage rope are connected to together get into the bottom along with the sampling pipe 11. The spliced guide rod is formed by splicing two or more guide rods 21, is longer in length and is suitable for a sampling environment with the water depth less than 15 meters, the guide rods 21 can be exposed out of the water surface, an operator directly grabs one end of each guide rod 21 and lifts or submerges the guide rods 21 to place the sampling pipe 11 into the water bottom or lift the water surface. The split joint type guide rod can realize quick connection and disassembly between the guide rods 21 through the D-shaped pin.

Further, as shown in fig. 3, the connecting seat 12 includes a bearing member 121, a connecting seat body 123 and a plurality of support columns 122, and one end of the guide rod 21 is connected to the bearing member 121; a plurality of support columns 122 are arranged on one side of the bearing part 121 far away from the guide rod 21 at intervals along the circumferential direction of the bearing part 121; the connecting base body 123 is connected to one end of the plurality of support columns 122 far away from the force bearing member 121, the sampling tube 11 is inserted in the connecting base body 123, and the overflow hole 1231 is arranged in the connecting base body 123. In the present embodiment, the number of the support columns 122 is preferably four, and four support columns 122 are uniformly arranged between the force bearing member 121 and the connecting seat body 123 at intervals along the circumferential direction. This kind of setting makes connecting seat 12 overall structure firm, and weight 22 can directly hammer on load-bearing part 121, need not set up buffers such as spring between weight 22 and load-bearing part 121, under the circumstances of guaranteeing equipment safety, passes to sampling pipe 11 bottom with the hammering power as far as possible, reduces the loss of power.

Preferably, connecting seat 12 adopts the aluminium material to make, can weight reduction, and intensity is good, guarantees that connecting seat 12 has sufficient bearing capacity.

Specifically, as shown in fig. 4 and 5, the connecting seat body 123 is provided with an overflow hole 1231, a limiting hole 1232 and an accommodating hole 1233 which are sequentially communicated, the collecting tube is accommodated in the accommodating hole 1233, and the sealing valve cover 13 passes through the limiting hole 1232 and is accommodated in the overflow hole 1231. The aperture of the limiting hole 1232 is smaller than the apertures of the overflow hole 1231 and the accommodating hole 1233, so that the movement of the sealing valve cover 13 is guided and limited. Preferably, in order to secure the sealing effect, the bottom surface of the sealing valve cover 13 is provided with a sealing ring 14 for sealing a gap between the spill hole 1231 and the sealing valve cover 13.

Further, as shown in fig. 5, a sealing washer 15 is disposed between the sampling tube 11 and the connecting socket body 123. The sealing washer 15 is sleeved outside the sampling tube 11 and used for sealing a gap between the sampling tube 11 and the accommodating hole 1233, so that the sealing effect is further improved.

Preferably, the aperture of the overflow hole 1231 is greater than or equal to the aperture of the sampling tube 11. It can be understood that the size of the aperture of the overflow hole 1231 determines the size of the disturbance of the water-mud interface, and when the sampling tube 11 is lowered to the water-mud interface, if the aperture of the overflow hole 1231 is smaller than the aperture of the sampling tube 11, the water column in the tube forms a pressure difference to the water-mud interface and presses the sediment on the interface out of the sampling tube 11; the smaller the aperture of the overflow 1231, the greater the pressure difference which is generated, the greater the disturbance, unless the sampling tube 11 is lowered very slowly, so that the volume of water entering the sampling tube 11 per unit time is equal to the volume of water discharged from the sampling tube 11, and the difference in the speeds of the entering and discharging water is not great, which is difficult to do in operation. In this embodiment, the aperture of the overflow hole 1231 is greater than or equal to the aperture of the sampling tube 11, so that the water in the sampling tube 11 can be discharged quickly without pressing the sediment out of the sampling tube 11.

Preferably, the connecting base body 123 is also provided with a lifting ring, and the sampling pulling rope can be connected through the lifting ring to pull the sampling pulling rope so as to lift the sampling pipe 11.

Further, as shown in fig. 3 and 5, a clamp 124 is disposed at the bottom end of the connecting seat body 123, the clamp 124 is sleeved outside the sampling tube 11, a mounting hole is disposed at a side portion of the clamp 124, and a fastener is inserted into the mounting hole to lock the sampling tube 11 to the connecting seat body 123. Specifically speaking, clamp 124 is the side and has the annular structure of breakpoint, and this clamp 124 breakpoint tip is equipped with the screw, and the bolt runs through to revolve with the nut behind the screw, makes clamp 124's breakpoint both ends approach gradually through revolving the nut, and the internal diameter of clamp 124 reduces gradually and embraces tightly to further fixed sampling pipe 11, with the sampling pipe 11 that satisfies in multiple specification. By adopting the arrangement, the problem that the sampling pipe 11 is easy to fall off is solved, and the success rate of sampling is ensured.

Further, as shown in fig. 6, the supporting assembly 3 comprises a steady member 31 and a plurality of supporting members 32, the steady member 31 is sleeved outside the sampling tube 11, the plurality of supporting members 32 are arranged on the steady member 31 at intervals along the circumference of the sampling tube 11, and the plurality of supporting members 32 can be inserted into the underwater sediment. It will be appreciated that the support assembly 3 is typically used in situations where the water flow is large, the sediment on the water bottom is thin (less than 5 cm), the bottom of the water is hard and the terrain on the water bottom is uneven, wherein the support members 32 can be inserted into the sediment on the water bottom to act as a positioning support, and the stabilizing members 31 can be kept horizontal to support the sampler standing vertically in the sediment on the water bottom, so as to obtain a sufficient, undisturbed sample of the sediment.

Preferably, with continued reference to fig. 6, the stabilizing member 31 is a circular ring structure with a mounting hole in the middle, which can reduce the resistance. The upper surface of the steady piece 31 is provided with a lifting ring which is used for connecting a sampling traction rope. It is further preferable that the supporting member 32 is screwed to the stabilizing member 31, and the supporting member 32 is a rod-shaped structure with a tapered bottom end, which can be inserted into the underwater sediment more conveniently and quickly. The number of the supporting members 32 is preferably three, the three supporting members 32 are circumferentially and uniformly arranged at the edge of the stabilizing member 31 at intervals and surround the sampling tube 11, the three supporting members 32 can play a role in stably supporting, and the overall structure of the supporting assembly 3 is relatively simple.

Preferably, the length of the supporting member 32 is generally 45 cm, so that the collecting pipe with the length of 60 cm-80 cm can be ensured to be vertically erected on the water bottom under the condition that the sediment is thin or the terrain has fluctuation, in addition, the supporting member 32 is arranged to be in a telescopic structure, so that the stable member 31 can be automatically leveled under the condition that the water bottom has fluctuation, and the universality is better.

It is further preferred that the stabilizing member 31 comprises a first part and a second part, which are snap-fit connected to fit over the sampling tube 11. It will be appreciated that where a support assembly 3 is used, the length of the sampling tube 11 is typically 60 cm to 80 cm, in which case removal of the stabilizing member 31 from the sampling tube 11 is difficult and labor intensive. Therefore, the fixing member 31 is provided in an openable and closable structure, and when the fixing member 31 is detached, it is only necessary to release the connection between the first member and the second member and detach the first member and the second member. This arrangement simplifies the dismounting and mounting of the steady piece 31 and reduces the workload of the operator.

Taking fig. 1 as an example, the working principle of the sediment sampler provided in this embodiment is as follows:

the connecting seat 12, the sampling pipe 11, the guide rod 21, the heavy hammer 22 and the support component 3 which are connected are placed into water through the balance weight traction rope and the sampling traction rope to descend, the sealing valve cover 13 is jacked up by water flow in the sampling pipe 11, water in the sampling pipe 11 can be quickly discharged through the overflow hole 1231, when the sampling pipe 11 descends to a water-mud interface, the pressure difference formed by a water column in the sampling pipe 11 on the water-mud interface is minimum, sediment on the water-mud interface can be guaranteed to smoothly enter the sampling pipe 11, and no disturbance is basically achieved. When the sampling tube 11 is still, the weight pulling rope is repeatedly lifted and released, so that the weight 22 moves up and down along the guide rod 21 to hammer the connecting seat 12, and the sampling tube 11 is inserted into the underwater sediment. At the same time, the supporting member 32 is inserted into the underwater sediment to play a role of positioning support, so that the steady member 31 is kept horizontal to support the sampling pipe 11 to be vertically erected in the underwater sediment, thereby obtaining a sufficient undisturbed sediment sample. After the collection is finished, the winch is used for pulling the sampling hauling rope to lift the sediment sampler, the sealing valve cover 13 can be automatically closed under the action of self weight and reverse water pressure, the overflow hole 1231 is completely sealed by the sealing ring 14 on the sealing valve cover 13, and the upper part in the sampling pipe 11 forms a vacuum negative pressure state, so that the sediment cannot fall out of the sampling pipe 11 before the bottom of the sampling pipe 11 leaks out of the water surface. In addition, by the sampling mode, when the bottom of the water bottom is mucky soil, the mucky soil can be collected by at least 20 cm, the bottom of the sampling pipe 11 can be basically sealed by means of the mucky soil with the 20 cm, and the sediment can not fall off when the bottom of the sampling pipe 11 is away from the water surface.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. This need not be, nor should it be exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A sediment sampler, comprising:

the sampling assembly (1) comprises a sampling pipe (11), a connecting seat (12) and a sealing valve cover (13), one end of the sampling pipe (11) is inserted into the connecting seat (12), an overflow hole (1231) communicated with the sampling pipe (11) is formed in the connecting seat (12), and the sealing valve cover (13) is movably arranged in the overflow hole (1231);

the force application assembly (2) comprises a guide rod (21) and a heavy hammer (22), one end of the guide rod (21) is connected with the connecting seat (12), the other end of the guide rod is connected with a sampling traction rope, the heavy hammer (22) is sleeved on the guide rod (21) and is connected with a counterweight traction rope, and the counterweight traction rope can pull the heavy hammer (22) to move along the guide rod (21) so as to hammer the connecting seat (12);

the supporting component (3) is sleeved outside the sampling pipe (11) and is configured to support the sampling pipe (11) so that the sampling pipe (11) can be vertically arranged at the water bottom.

2. The sediment sampler of claim 1, wherein the support assembly (3) comprises a stabilizing member (31) and a plurality of support members (32), the stabilizing member (31) is sleeved outside the sampling tube (11), the plurality of support members (32) are arranged on the stabilizing member (31) at intervals along the circumference of the sampling tube (11), and the plurality of support members (32) can be inserted into the sediment.

3. Sediment sampler according to claim 2, characterized in that the stabilizing member (31) comprises a first part and a second part, which are snap-fit connected to fit over the sampling tube (11).

4. The sediment sampler according to claim 1, wherein the weight (22) comprises a first weight (221) and a second weight (222) whose axes coincide, and the first weight (221) and the second weight (222) are detachably connected.

5. The sediment sampler of claim 1, wherein the connection seat (12) comprises:

one end of the guide rod (21) is connected with the bearing part (121);

the supporting columns (122) are arranged on one side, away from the guide rod (21), of the bearing part (121) at intervals along the circumferential direction of the bearing part (121);

the sampling device comprises a connecting seat body (123) connected to one end, far away from the bearing piece (121), of the support columns (122), the sampling pipe (11) is inserted into the connecting seat body (123), and the overflow hole (1231) is formed in the connecting seat body (123).

6. Sediment sampler according to claim 5, characterized in that a sealing gasket (15) is arranged between the sampling tube (11) and the connection socket body (123).

7. The sediment sampler of claim 5, wherein a clamp (124) is arranged at the bottom end of the connecting base body (123), the clamp (124) is sleeved outside the sampling pipe (11), and a mounting hole is arranged on the side surface of the clamp (124), and a fastener is arranged in the mounting hole in a penetrating way to lock the sampling pipe (11) on the connecting base body (123).

8. Sediment sampler according to any of claims 1-7, characterized in that the bottom surface of the sealing valve cover (13) is provided with a sealing ring (14).

9. Sediment sampler according to any of claims 1-7, characterized in that the aperture of the overflow aperture (1231) is larger than or equal to the aperture of the sampling tube (11).

10. Sediment sampler according to any of claims 1-7, characterized in that an inner membrane is arranged inside the sampling tube (11).