Portable positioning type underwater sediment sampling device for environment identification and detection

Abstract

The utility model relates to a portable positioning type underwater sediment sampling device for environment identification and detection, which comprises a sampling end and an operating end, the sampling end comprises a fixed fan-shaped sampling fin and a sliding fan-shaped sampling fin, and the operating end comprises an annular track, a tightening latch, a floating ball, an adjusting piece and a first spring. The fixed fan-shaped sampling fins are installed on the edge of the lower end face of the annular track, the two sets of sliding fan-shaped sampling fins are arranged, sliding blocks are arranged at the tops of the sliding fan-shaped sampling fins, limiting holes and self-locking holes are formed in the sliding blocks, the bottom end of the tightening latch penetrates through the annular track to be inserted into the limiting holes, one end of the adjusting piece is fixed to the floating ball, and the other end of the adjusting piece is fixed to the floating ball. The adjusting part of the adjusting piece is detachably connected to the tightening latch, the annular track is provided with a shape following groove used for installing the first springs, one end of each first spring is fixed in the shape following groove, the other end of each first spring is attached to the sliding block, and the annular track is further provided with a self-locking assembly. The self-locking assembly comprises a second spring and a clamping and locking rod.

Description

Technical Field

[0001] The utility model relates to the technical field of environmental sampling equipment, and more specifically to a portable positioning type underwater sediment sampling device for environmental identification and detection. Background Art

[0002] In the environmental damage forensic identification industry, underwater sediments are an important source of parameter collection for studying the diffusion pathways and ranges of pollutants underwater. Studying the changes in pollutants in different layers of sediments can help understand changes in the entire water environment system.

[0003] Existing water sediment samplers are generally divided into two categories: grab type and column type. Among them, the grab type sampler collects sediments by grabbing, and its structure is simple, but the disturbance to the sediment is large, which is easy to destroy the original structure of the sediment, resulting in the inability to present a complete profile, and is not conducive to the stratified analysis of the chemical composition of each layer. Therefore, it is only suitable for the collection of sediment samples in judicial identification of environmental damage. Existing column samplers generally push the sediment sample from the sampling tube through a piston after sampling. This process is laborious and disturbs the cross-sectional structure of the sample. The utility model proposes a new solution to the above problems. Utility Model Content

[0004] In view of the problems existing in the prior art, the purpose of the utility model is to provide a portable positioning underwater sediment sampling device for environmental identification and detection to solve the technical problems mentioned in the background technology.

[0005] To solve the above problems, the utility model adopts the following technical solutions.

[0006] A portable positioning underwater sediment sampling device for environmental identification and detection, comprising a sampling end and an operating end, wherein the sampling end is mounted at the bottom of the operating end, the sampling end comprises a fixed fan-shaped sampling fin and a sliding fan-shaped sampling fin, the operating end comprises an annular track, a bolt rod, a floating ball, an adjusting member, and a first spring, the fixed fan-shaped sampling fin is mounted on the lower end surface edge of the annular track, the sliding fan-shaped sampling fin is provided with two groups, a slider is provided on the top of the sliding fan-shaped sampling fin, and the two groups of the sliding fan-shaped sampling fins are symmetrically connected to the lower end of the annular track by sliding through the slider The edge of the surface, and one side of the sliding fan-shaped sampling fin is slidably fitted with the fixed fan-shaped sampling fin, a limit hole and a self-locking hole are provided on the slider, the bottom end of the bolt rod passes through the annular track and is inserted into the limit hole, one end of the adjusting member is fixed on the float, the adjusting portion of the adjusting member is detachably connected to the bolt rod, and the other end of the adjusting member is detachably connected to the annular track, two groups of first springs are provided, and a conforming groove for installing the first spring is provided on the annular track, one end of the first spring is fixed in the conforming groove, and the other end of the first spring is fitted on the slider, and a self-locking component is also provided on the annular track, wherein

[0007] The self-locking assembly includes a second spring and a locking rod. A mounting through hole is provided on the annular track. The locking rod is slidably connected in the mounting through hole, and the second spring is sleeved on the locking rod. One end of the second spring is fixed on the annular track, and the other end of the second spring is fixed on the locking rod. A slope is provided on one side of the locking rod.

[0008] Preferably, the adjustment member is a soft rope with scale lines provided on it, one end of the soft rope is fixed on the float, the middle of the soft rope is bolted to the bolt rod, the other end of the soft rope is bolted to a handle, and the handle bolt is connected to the annular track.

[0009] In any of the above schemes, preferably, the adjusting member includes a telescopic rod and an adjusting rod, the bottom fixed end of the telescopic rod is threadedly connected to the top of the adjusting rod, the adjusting rod is provided with an adjusting thread, a connecting through hole is opened on the annular track, the adjusting rod passes through the connecting through hole, and the adjusting rod is threadedly connected to the connecting through hole, a ring is fixed on the bottom end of the telescopic part of the telescopic rod, and the bolt rod passes through the ring and is inserted into the limiting hole.

[0010] In any of the above schemes, preferably, the adjusting member includes a telescopic rod, an adjusting rod, a third spring, a pull rod, and a locking rack, the bottom of the telescopic rod is fixed to the top of the adjusting rod, the outer side of the adjusting rod is sleeved with a limiting tube, the outer side of the limiting tube is threadedly connected to the limiting rod, one end of the limiting rod passes through the limiting tube and fits on the adjusting rod, and a locking groove is provided on the limiting tube, the pull rod is slidably connected to the annular track, and the third spring is sleeved on the pull rod, one end of the third spring is fixed on the pull rod, and the other end of the third spring is fixed on the annular track, the locking rack is fixed to one end of the pull rod, the locking rack is inserted into the locking groove, a connecting through hole is opened on the annular track, the limiting tube is inserted into the connecting through hole, a ring is fixed on the bottom end of the telescopic part of the telescopic rod, and the bolt rod passes through the ring and is inserted into the limiting hole.

[0011] In any of the above solutions, preferably, a positioning scale is provided on the limiting tube.

[0012] In any of the above schemes, preferably, the fixed fan-shaped sampling fin is connected to the annular track bolt, and the sliding fan-shaped sampling fin is connected to the slider bolt.

[0013] Compared with the prior art, the advantages of the present invention are:

[0014] The design of the sampling end and the operating end of the utility model utilizes the sliding fan-shaped sampling fin and the fixed fan-shaped sampling fin to overlap when entering the liquid. When the sampling depth is reached, the fixed fan-shaped sampling fin and the sliding fan-shaped sampling fin are inserted into the sediment. Under the action of the float and the adjustment member, the bolt rod is pulled out. Under the action of the first spring, the sliding fan-shaped sampling fin slides along the annular track, and the sediment is cut during the sliding process. When the sliding fan-shaped sampling fin and the fixed fan-shaped sampling fin form a conical end, the sliding fan-shaped sampling fin and the fixed fan-shaped sampling fin form a conical end. The sampling cavity is provided with a self-locking component to lock the sliding fan-shaped sampling fin, and the sediment sample can be taken out by pulling up the operating end. Then the locking rod is pulled to push the sliding fan-shaped sampling fin to overlap the sliding fan-shaped sampling fin with the fixed fan-shaped sampling fin, and the sample is placed in the sample storage box. The whole process has minimal disturbance to the sediment sampling part and the surrounding area, and in the process of taking out the sample from the sampling end, there is no squeezing and little wear on the sample, thereby ensuring the integrity of the sample. The operation is simple, the disturbance is small, and the influence on the test results is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of a portable positioning underwater sediment sampling device for environmental identification and detection of the utility model;

[0016] Figure 2 It is a schematic diagram of the internal structure of the ring track;

[0017] Figure 3 It is the working schematic diagram of the sampling end;

[0018] Figure 4 It is a structural schematic diagram of Example 2;

[0019] Figure 5 This is a schematic diagram of the structure of Example 3.

[0020] Description of the numbers in the figure:

[0021] 1. Sampling end; 2. Operation end; 101. Fixed fan-shaped sampling fin; 102. Sliding fan-shaped sampling fin; 201. Annular track; 202. Bolt rod; 203. Float; 204. Adjustment member; 205. First spring; 103. Sliding block; 104. Positioning hole; 105. Self-locking hole; 206. Conformal groove; 3. Self-locking assembly; 301. Second spring; 302. Locking rod; 207 , mounting through hole; 303, inclined plane; 208, scale line; 209, handle; 20401, telescopic rod; 20402, adjustment rod; 210, connecting through hole; 20403, collar; 20404, third spring; 20405, pull rod; 20406, lock rack; 20407, limit tube; 20408, limit rod; 20409, lock slot; 20410, positioning ruler. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model; it is obvious that the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the utility model without making creative work are within the scope of protection of the utility model.

[0023] Embodiment 1:

[0024] See also Figures 1 to 3A portable positioning underwater sediment sampling device for environmental identification and detection comprises a sampling end 1 and an operating end 2, wherein the sampling end 1 is mounted at the bottom of the operating end 2, the sampling end 1 comprises a fixed fan-shaped sampling fin 101 and a sliding fan-shaped sampling fin 102, the operating end 2 comprises an annular track 201, a bolt rod 202, a floating ball 203, an adjusting member 204, and a first spring 205, the fixed fan-shaped sampling fin 101 is mounted on the lower end surface edge of the annular track 201, the sliding fan-shaped sampling fin 102 is provided with two groups, a slider 103 is provided on the top of the sliding fan-shaped sampling fin 102, the two groups of sliding fan-shaped sampling fins 102 are symmetrically connected to the lower end surface edge of the annular track 201 by sliding through the slider 103, and the sliding fan-shaped sampling fin 10 2 is slidably fitted with the fixed fan-shaped sampling fin 101, a limiting hole 104 and a self-locking hole 105 are provided on the slider 103, the bottom end of the bolt rod 202 passes through the annular track 201 and is inserted into the limiting hole 104, one end of the adjusting member 204 is fixed on the floating ball 203, the adjusting portion of the adjusting member 204 is detachably connected to the bolt rod 202, and the other end of the adjusting member 204 is detachably connected to the annular track 201, two groups of first springs 205 are provided, and a conforming groove 206 for installing the first spring 205 is provided on the annular track 201, one end of the first spring 205 is fixed in the conforming groove 206, and the other end of the first spring 205 is fitted on the slider 103, and a self-locking component 3 is also provided on the annular track 201, wherein

[0025] The self-locking assembly 3 includes a second spring 301 and a locking rod 302. The annular track 201 is provided with a mounting through hole 207. The locking rod 302 is slidably connected to the annular track 201, and the second spring 301 is sleeved on the locking rod 302. One end of the second spring 301 is fixed in the mounting through hole 207, and the other end of the second spring 301 is fixed on the locking rod 302. A slope 303 is provided on one side of the locking rod 302.

[0026] The sliding fan-shaped sampling fin 102 and the fixed fan-shaped sampling fin 101 are overlapped when entering the liquid. When the sampling depth is reached, the fixed fan-shaped sampling fin 101 and the sliding fan-shaped sampling fin 102 are inserted into the sediment. Under the action of the float 203 and the adjustment member 204, the bolt rod 202 is pulled out. Under the action of the first spring 205, the sliding fan-shaped sampling fin 102 slides along the annular track 201, and the sediment is cut during the sliding process. When the sliding fan-shaped sampling fin 102 and the fixed fan-shaped sampling fin 101 form a cone at the end, the sliding fan-shaped sampling fin 102 and the fixed fan-shaped sampling fin 101 form a cone at the end. The sampling chamber is provided with a self-locking component 3 to lock the sliding fan-shaped sampling fin 102, and the operating end 2 is pulled to take out the sediment sample. Then, the locking rod 302 is pulled to push the sliding fan-shaped sampling fin 102 to overlap the sliding fan-shaped sampling fin 102 with the fixed fan-shaped sampling fin 101, and the sample is placed in the sample storage box. The whole process has minimal disturbance to the sediment sampling part and the surrounding area, and in the process of taking out the sample from the sampling end, there is no squeezing and little wear on the sample, thereby ensuring the integrity of the sample, and the operation is simple, the disturbance is small, and the influence on the test result is reduced.

[0027] In this embodiment, the adjustment member 204 is a soft rope, and a scale line 208 is set on the soft rope. One end of the soft rope is fixed on the float 203, the middle part of the soft rope is bolted to the bolt rod 202, and the other end of the soft rope is bolted to a handle 209, and the handle 209 is bolted to the annular track 201. By adjusting the position of the soft rope and the bolt rod 202, the distance by which the float 203 pulls the bolt rod 202 is controlled, thereby controlling the position of the sampling trigger, and then controlling the maximum depth of the sampling. Of course, you can also choose to insert it into the specified position, manually pull the bolt rod 202, or touch the sampling end 1, and the operation is simple.

[0028] Embodiment 2:

[0029] Based on Example 1, Figures 2 to 4Furthermore, the adjusting member 204 includes a telescopic rod 20401 and an adjusting rod 20402. The bottom fixed end of the telescopic rod 20401 is threadedly connected to the top of the adjusting rod 20402. The adjusting rod 20402 is provided with an adjusting thread. A connecting through hole 210 is provided on the annular track 201. The adjusting rod 20402 passes through the connecting through hole 210, and the adjusting rod 20402 is threadedly connected to the connecting through hole 210. A collar 20403 is fixed to the bottom end of the telescopic portion of the telescopic rod 20401. , the bolt rod 202 passes through the ring 20403 and is inserted into the limit hole 104; after the device enters the liquid, the float 203 is kept above the liquid surface under the action of buoyancy, and the sampling end 1 continuously moves toward the liquid surface. During the movement, the float 203 drives the telescopic rod 20401 to extend. It should be noted that the friction force between the telescopic parts of the telescopic rod 20401 gradually decreases from bottom to top to ensure that the telescopic parts of the telescopic rod 20401 slide from top to bottom. When the sampling end 1 is inserted into the designated sampling position, At this time, the telescopic rod 20401 is extended to the longest position, and the telescopic part at the bottom of the telescopic rod 20401 drives the ring 20403 to move upward, thereby pulling the bolt rod 202 to move upward, and the bolt rod 202 is separated from the slider 103. When the sliding fan-shaped sampling fin 102 overlaps with the fixed fan-shaped sampling fin 103, the first spring 301 is in a compressed state. Once the bolt rod 202 is separated from the slider 103, under the elastic force of the first spring 301, the sliding fan-shaped sampling fin 102 moves along the annular shape with the slider 103. The track 201 slides, and when the slider 103 slides to the designed position, the locking rod 302 is inserted into the self-locking hole 105, thereby locking the slider 103. The sliding fan-shaped sampling fin 102 and the fixed fan-shaped sampling fin 101 form a sampling cavity with a conical end. Of course, the telescopic rod 20401 can also be manually pulled to trigger the bolt rod 202. The maximum sampling depth can be controlled by adjusting the position of the adjustment rod 20402 or replacing the telescopic rod 20401 with different lengths to meet the requirements of different sampling environments. It is flexible and convenient.

[0030] Embodiment 3:

[0031] Based on Example 1, Figure 2 , Figure 3 , Figure 5Furthermore, the adjusting member 204 includes a telescopic rod 20401, an adjusting rod 20402, a third spring 20404, a pull rod 20405, and a locking rack 20406. The bottom of the telescopic rod 20401 is fixed to the top of the adjusting rod 20402. The outer side of the adjusting rod 20402 is sleeved with a limiting tube 20407. The outer side of the limiting tube 20407 is threadedly connected to the limiting rod 20408. One end of the limiting rod 20408 passes through the limiting tube 20407 and fits on the adjusting rod 20402. The limiting tube 20407 is provided with a locking groove 20409. The pull rod 20405 is slidably connected to the annular track 201, and the third spring 20404 is sleeved on the pull rod 20405. The third spring 20404 is fixed on the rod 20405, one end of the third spring 20404 is fixed on the pull rod 20405, the other end of the third spring 20404 is fixed on the annular track 201, the lock rack 20406 is fixed on one end of the pull rod 20405, the lock rack 20406 is inserted into the lock groove 20409, a connecting through hole 210 is provided on the annular track 201, a limiting tube 20407 is inserted into the connecting through hole 210, and a collar 20403 is fixed on the bottom end of the telescopic part of the telescopic rod 20401, and the bolt rod 202 passes through the collar 20403 and is inserted into the limiting hole 104; after the device enters the liquid, the float 203 is kept above the liquid surface under the action of buoyancy, and the sampling The end 1 continuously moves toward the liquid surface, and during the movement, the float 203 drives the telescopic rod 20401 to extend. It should be noted that the friction force between the telescopic parts of the telescopic rod 20401 gradually decreases from bottom to top to ensure that the telescopic parts of the telescopic rod 20401 slide from top to bottom. When the sampling end 1 is inserted into the designated sampling position, the telescopic rod 20401 extends to the longest position, and the bottom telescopic part of the telescopic rod 20401 drives the ring 20403 to move upward, thereby pulling the bolt rod 202 to move upward, and the bolt rod 202 is separated from the slider 103. When the sliding fan-shaped sampling fin 102 overlaps with the fixed fan-shaped sampling fin 103, the first spring 301 is in compression. State, once the bolt rod 202 is disengaged from the slider 103, under the elastic force of the first spring 301, the sliding fan-shaped sampling fin 102 slides along the annular track 201 with the slider 103, and when the slider 103 slides to the designed position, the locking rod 302 is inserted into the self-locking hole 105, thereby locking the slider 103, and the sliding fan-shaped sampling fin 102 and the fixed fan-shaped sampling fin 101 form a sampling cavity with a conical end. Of course, the telescopic rod 20401 can also be manually pulled to trigger the bolt rod 202. The maximum sampling depth can be controlled by adjusting the position of the adjustment rod 20402 or replacing the telescopic rod 20401 of different lengths to meet the requirements of different sampling environments, which is flexible and convenient.

[0032] In this embodiment, a positioning scale 20410 is provided on the position limiting tube 20407 ; the positioning scale 20410 is used to assist in controlling the position of the position limiting tube 20407 .

[0033] In this embodiment, the fixed fan-shaped sampling fin 101 is bolted to the annular track 201, and the sliding fan-shaped sampling fin 102 is bolted to the slider 103; through the above design, the fixed fan-shaped sampling fin 101 and the sliding fan-shaped sampling fin 102 can be easily disassembled and replaced.

[0034] The working process of the utility model is as follows:

[0035] The operator can use the bolt rod 202 to insert into the limiting hole 104 of the slider. At this time, the sliding fan-shaped sampling fin 102 overlaps with the fixed fan-shaped sampling fin 101. When the sliding fan-shaped sampling fin 102 overlaps with the fixed fan-shaped sampling fin 103, the first spring 301 is in a compressed state. The device is placed in the liquid. When the sampling depth is reached, the fixed fan-shaped sampling fin 101 and the sliding fan-shaped sampling fin 102 are inserted into the sediment. Under the action of the float 203 and the adjustment member 204, the bolt rod 202 is pulled out. Under the action of the first spring 205, the sliding fan-shaped sampling fin 102 slides along the annular track 201. During the sliding process, the sediment is compressed. Cutting is performed, and when the sliding fan-shaped sampling fin 102 and the fixed fan-shaped sampling fin 101 form a sampling cavity with a conical end, the sliding fan-shaped sampling fin 102 is locked by the self-locking component 3, and the operating end 2 is pulled to take out the sediment sample, and then the locking rod 302 is pulled to push the sliding fan-shaped sampling fin 102 to overlap the sliding fan-shaped sampling fin 102 with the fixed fan-shaped sampling fin 101, and the sample is placed in the sample storage box. The whole process has minimal disturbance to the sediment sampling part and the surrounding area, and in the process of taking out the sample from the sampling end, there is no squeezing and little wear on the sample, thereby ensuring the integrity of the sample, simple operation, small disturbance, and reduced impact on the test results.

[0036] The above is only a preferred specific implementation of the utility model; however, the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and improved ideas of the utility model within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model.

Claims

1. A portable positioning underwater sediment sampling device for environmental identification and detection, comprising a sampling end (1) and an operating end (2), wherein the sampling end (1) is mounted at the bottom of the operating end (2), and is characterized in that: The sampling end (1) comprises a fixed fan-shaped sampling fin (101) and a sliding fan-shaped sampling fin (102); the operating end (2) comprises an annular track (201), a bolt rod (202), a floating ball (203), an adjusting member (204), and a first spring (205); the fixed fan-shaped sampling fin (101) is mounted on the lower end surface edge of the annular track (201); two groups of sliding fan-shaped sampling fins (102) are provided; a slider (103) is provided on the top of the sliding fan-shaped sampling fin (102); the two groups of sliding fan-shaped sampling fins (102) are symmetrically connected to the lower end surface edge of the annular track (201) by sliding through the slider (103); one side of the sliding fan-shaped sampling fin (102) is slidably fitted with the fixed fan-shaped sampling fin (101); the slider (103) is provided on the upper surface of the sliding fan-shaped sampling fin (102); 03) is provided with a limiting hole (104) and a self-locking hole (105), the bottom end of the bolt rod (202) passes through the annular track (201) and is inserted into the limiting hole (104), one end of the adjusting member (204) is fixed on the floating ball (203), the adjusting portion of the adjusting member (204) is detachably connected to the bolt rod (202), the other end of the adjusting member (204) is detachably connected to the annular track (201), two groups of first springs (205) are provided, and a conforming groove (206) for installing the first spring (205) is provided on the annular track (201), one end of the first spring (205) is fixed in the conforming groove (206), and the other end of the first spring (205) is attached to the slider (103), and a self-locking component (3) is also provided on the annular track (201), wherein The self-locking component (3) comprises a second spring (301) and a locking rod (302); a mounting through hole (207) is provided on the annular track (201); the locking rod (302) is slidably connected in the mounting through hole (207); the second spring (301) is sleeved on the locking rod (302); one end of the second spring (301) is fixed on the annular track (201); the other end of the second spring (301) is fixed on the locking rod (302); and a slope (303) is provided on one side of the locking rod (302).

2. A portable positioning underwater sediment sampling device for environmental identification and detection according to claim 1, characterized in that: The adjusting member (204) is a soft rope with a scale line (208) arranged on it. One end of the soft rope is fixed on the float (203), the middle part of the soft rope is bolted to the bolt rod (202), and the other end of the soft rope is bolted to a handle (209), which is bolted to the annular track (201).

3. A portable positioning underwater sediment sampling device for environmental identification and detection according to claim 1, characterized in that: The adjusting member (204) comprises a telescopic rod (20401) and an adjusting rod (20402); the bottom fixed end of the telescopic rod (20401) is threadedly connected to the top end of the adjusting rod (20402); the adjusting rod (20402) is provided with an adjusting thread; a connecting through hole (210) is provided on the annular track (201); the adjusting rod (20402) passes through the connecting through hole (210); and the adjusting rod (20402) is threadedly connected to the connecting through hole (210); a collar (20403) is fixed to the bottom end of the telescopic portion of the telescopic rod (20401); the bolt rod (202) passes through the collar (20403) and is inserted into the limiting hole (104).

4. A portable positioning underwater sediment sampling device for environmental identification and detection according to claim 1, characterized in that: The adjusting member (204) comprises a telescopic rod (20401), an adjusting rod (20402), a third spring (20404), a pull rod (20405), and a locking rack (20406); the bottom of the telescopic rod (20401) is fixed to the top of the adjusting rod (20402); the outer side of the adjusting rod (20402) is sleeved with a limiting tube (20407); the outer side of the limiting tube (20407) is threadedly connected to the limiting rod (20408); one end of the limiting rod (20408) passes through the limiting tube (20407) and fits on the adjusting rod (20402); the limiting tube (20407) is provided with a locking groove (20409); the pull rod (20405) is slidably connected to the annular track (201); and the The third spring (20404) is sleeved on the pull rod (20405), one end of the third spring (20404) is fixed on the pull rod (20405), and the other end of the third spring (20404) is fixed on the annular track (201). The lock rack (20406) is fixed on one end of the pull rod (20405), and the lock rack (20406) is inserted into the lock groove (20409). A connecting through hole (210) is opened on the annular track (201), and a limiting tube (20407) is inserted into the connecting through hole (210), and a ring (20403) is fixed on the bottom end of the telescopic part of the telescopic rod (20401), and the bolt rod (202) passes through the ring (20403) and is inserted into the limiting hole (104).

5. A portable positioning underwater sediment sampling device for environmental identification and detection according to claim 4, characterized in that: The position limiting tube (20407) is provided with a positioning scale (20410).

6. A portable positioning underwater sediment sampling device for environmental identification and detection according to claim 1, characterized in that: The fixed fan-shaped sampling fin (101) is bolted to the annular track (201), and the sliding fan-shaped sampling fin (102) is bolted to the sliding block (103).

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