A sediment sampling device for aquatic ecological surveys

Abstract

The present application relates to the technical field of sampling device, disclose a kind of aquatic ecological survey's sediment sampling device, including top disc, the lower surface of the top disc is fixedly installed with left half pipe, the side of the left half pipe is hinged with right half pipe, the left half pipe and right half pipe can be folded into a whole pipe, and the outer surface of the left half pipe and right half pipe close to top disc are all fixedly installed with one-way valve, further including the sampling head for fixing left half pipe and right half pipe, the sampling head is conical tubular structure.The present application is collected to sediment by tubular containment bag, so as to be fished up in sampling completion this device, and after opening right half pipe, tubular containment bag bag mouth can be directly tied up using tie, tubular containment bag and its internal sediment are directly taken out of left half pipe, the sediment sample collected is conveniently collected, and the sediment is conveniently packed and transported subsequently by wrapping and collecting sediment using tubular containment bag.

Description

Technical Field

[0001] This invention relates to the field of sampling device technology, and in particular to a sediment sampling device for aquatic ecological surveys. Background Technology

[0002] With the development of technology, pollutants generated from various production processes often end up in water bodies, causing water pollution. These pollutants eventually settle at the bottom of the water and mix with silt and sand. Currently, when restoring and protecting the water environment, it is necessary to first investigate the water environment, which includes the process of sampling bottom sediments. At present, bottom sediment sampling is usually carried out by inserting pipe equipment into the bottom of the water to pump it out, or by sinking a pipe, stuffing it with sediment, and then lifting it out.

[0003] The existing columnar sampler for shallow water sediments (publication number: CN2419591Y) has at least the following drawbacks: The aforementioned patent applies uniform downward force when the sampling tube contacts the sediment interface, allowing the tube to slowly enter the sediment. After reaching the set sediment thickness, the sealing block and sealing gasket are promptly lowered. The weight of the sealing block then presses the sealing gasket against the outer top surface of the cap, blocking the through-hole on the cap and sealing the water vapor passage at the top of the sampling tube. Finally, the sampler is slowly lifted, trapping a complete, undisturbed columnar sample of sediment within the sampling tube. However, when removing the sample, the bottom of the sample column needs to be sealed with a rubber stopper to unscrew the sampling tube. Then, a sampling support rod of the same size and shape as the sampling tube is used to push the sample column upwards, making sediment sample removal cumbersome. Furthermore, a separate packaging container is required to contain the sample column after it has been pushed out. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a sediment sampling device for aquatic ecological surveys.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A sediment sampling device for aquatic ecological survey includes a top plate. A left half-tube is fixedly installed on the lower surface of the top plate, and a right half-tube is hinged to one side of the left half-tube. The left and right half-tubes can be closed into a single tube. One-way valves are fixedly installed through the outer surfaces of both the left and right half-tubes near the top plate. The device also includes a sampling head for fixing the left and right half-tubes. The sampling head has a conical tubular structure. The inner walls of both the left and right half-tubes away from the top plate have receiving grooves. The sampling head is threaded to the inner wall of the receiving grooves. A sleeve is fixedly installed at the top of the sampling head. A replaceable tubular receiving bag is fitted on the outer surface of the sleeve. A top plate is fixedly installed at one end of the tubular receiving bag. Several through holes are evenly distributed through the top plate. A limiting mechanism for limiting the position of the top plate is installed on the top plate.

[0007] As a further embodiment of the present invention, the limiting mechanism includes a mounting groove formed on the upper surface of the top plate. Two clamping blocks are symmetrically and slidably mounted on the inner wall of the mounting groove. A retaining groove is formed on the outer surface of each of the two clamping blocks on an adjacent side. A first spring rod is fixedly mounted between the ends of the two clamping blocks that are far apart from each other and the inner wall of the mounting groove. A fixing post is fixedly mounted on the top of the top plate. A retaining ring is fixedly mounted on the top of the fixing post. A circular hole for the retaining ring to pass through is formed on the lower surface of the top plate. The retaining groove has a flared hole structure.

[0008] As a further embodiment of the present invention, a resistance ring is fixedly installed on the inner wall of the receiving groove opened on the left half tube, and the resistance ring can be sleeved on the outside of the sleeve.

[0009] As a further embodiment of the present invention, a locking mechanism is installed between the sampling head and the left and right half-tubes. The locking mechanism includes a plurality of limiting posts that are uniformly fixedly installed at the ends of the left and right half-tubes away from the top plate. The outer surface of the threaded connection of the sampling head is provided with an annular groove for wrapping the plurality of limiting posts.

[0010] As a further embodiment of the present invention, a locking mechanism is installed between the left and right half-tubes and their sides opposite to the hinge side. The locking mechanism includes a plurality of locking slots evenly opened on the side of the left half-tube opposite to the hinge side. A plurality of locking blocks corresponding to the locking slots are evenly fixedly installed on the side of the right half-tube away from the hinge side. An insertion hole is opened through the outer surface of the locking block. A sliding groove is opened on the outer surface of the left half-tube near each locking slot. A pin matching the insertion hole is slidably installed through the inner wall of the sliding groove. A connecting rod is fixedly installed between the plurality of pins. A top ring for pushing the connecting rod to move is fixedly installed on the outer surface of the sampling head. A reset assembly is installed between the connecting rod and the top plate.

[0011] As a further embodiment of the present invention, the reset assembly includes a second spring rod fixedly installed between the top plate and the end of the connecting rod, and a cover sleeve is fixedly installed on the outer surface of the left half tube near the connecting rod, with the second spring rod and the connecting rod both installed inside the cover sleeve.

[0012] As a further aspect of the present invention, a plurality of ball bearings for straightening the tubular receiving bag are uniformly and rollingly installed on the inner wall of the receiving groove near the resistance ring.

[0013] As a further embodiment of the present invention, a synchronization component is installed between the two clamping blocks. The synchronization component includes a rack fixedly installed on the outer surface of the two clamping blocks on a side away from each other. One end of the rack passes through the outer surface of the top plate. An end cover is fixedly installed on the top of the top plate. A synchronization gear is rotatably installed on the lower surface of the end cover. The rack meshes with the synchronization gear.

[0014] As a further embodiment of the present invention, a vibration motor is fixedly installed on the top of the end cap, and a sealing cover is also fixedly installed on the top of the end cap. The vibration motor is installed inside the sealing cover, and a hanging ring is fixedly installed on the top of the sealing cover.

[0015] As a further embodiment of the present invention, a touch switch is also fixedly installed on the lower surface of the end cap, and the touch switch is located between the two clamping blocks.

[0016] The beneficial effects of this invention are as follows:

[0017] 1. Collect sediments using a tubular containment bag so that after sampling is completed and the device is retrieved, and the right half-tube is opened, the opening of the tubular containment bag can be directly tied with a cable tie, and the tubular containment bag and the sediments inside can be directly pulled out of the left half-tube. This facilitates the collection of sediment samples. The tubular containment bag is used to wrap and collect the sediments, which makes it easier to pack and transport the sediments directly afterward.

[0018] 2. The tubular containment bag separates the sediment from the left and right halves of the tube, preventing sediment from adhering to the inner walls of the left and right halves of the tube and eliminating the need for subsequent cleaning, making it more convenient to use;

[0019] 3. By setting up openable left and right half-pipes, it is convenient to remove the collected sediment samples. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of a sediment sampling device for aquatic ecological survey proposed in this invention.

[0021] Figure 2 This is a schematic diagram of a sediment sampling device for aquatic ecological survey proposed in this invention, after removing the right half of the pipe and the sealing cover.

[0022] Figure 3 This is a schematic diagram of the installation state of the tubular receiving bag of a sediment sampling device for aquatic ecological survey proposed in this invention.

[0023] Figure 4 This is a schematic diagram of the sampling head structure of a sediment sampling device for aquatic ecological survey proposed in this invention;

[0024] Figure 5 This is a schematic diagram of the right half of the pipe structure of a sediment sampling device for aquatic ecological survey proposed in this invention.

[0025] Figure 6 This is a schematic diagram of the connecting rod structure of a sediment sampling device for aquatic ecological survey proposed in this invention;

[0026] Figure 7 This is a schematic diagram of the top and bottom structure of a sediment sampling device for aquatic ecological survey proposed in this invention;

[0027] Figure 8 This is a schematic diagram of the internal structure of the top plate of a sediment sampling device for aquatic ecological survey proposed in this invention.

[0028] Figure 9 This is a schematic diagram of the clamping block structure of a sediment sampling device for aquatic ecological survey proposed in this invention;

[0029] Figure 10 This is a schematic diagram of the disassembled structure of the end cap and synchronous gear of a sediment sampling device for aquatic ecological survey proposed in this invention.

[0030] Figure 11 This is a schematic diagram of the right half of the pipe structure of a sediment sampling device for aquatic ecological survey proposed in this invention.

[0031] Figure 12 for Figure 5 Enlarged view of the structure at point A in the middle;

[0032] Figure 13 for Figure 5 Enlarged view of the structure at point B in the middle;

[0033] Figure 14 for Figure 6 Enlarged view of the structure at point C;

[0034] Figure 15 for Figure 11 Enlarged view of the structure at point D.

[0035] In the diagram: 1. Top plate; 2. Left half-tube; 3. Right half-tube; 4. Sampling head; 5. Sleeve; 6. Tubular receiving bag; 7. Top plate; 8. Resistance ring; 9. Fixing column; 10. Retaining ring; 11. End cap; 12. Vibration motor; 13. Sealing cover; 14. Hanging ring; 15. Mounting groove; 16. Rack; 17. Clamping block; 18. Holding groove; 19. First spring rod; 20. Touch switch; 21. Synchronous gear; 22. Annular groove; 23. Limiting column; 24. Receiving groove; 25. Ball bearing; 26. Locking groove; 27. Slide groove; 28. Pin; 29. ​​Connecting rod; 30. Top ring; 31. Locking block; 32. Covering sleeve; 33. Second spring rod; 34. One-way valve. Detailed Implementation

[0036] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0037] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0038] See attached document Figure 1 - Appendix Figure 15A sediment sampling device for aquatic ecological survey includes a top plate 1, a left half-pipe 2 fixedly installed on the lower surface of the top plate 1, a right half-pipe 3 hinged to one side of the left half-pipe 2, the left half-pipe 2 and the right half-pipe 3 can be closed into a whole pipe, and a one-way valve 34 is fixedly installed through the outer surface of the left half-pipe 2 and the right half-pipe 3 near the top plate 1. It also includes a sampling head 4 for fixing the left half-pipe 2 and the right half-pipe 3. The sampling head 4 has a conical tubular structure. The inner wall of the left half-pipe 2 and the right half-pipe 3 away from the top plate 1 is provided with a receiving groove 24. The sampling head 4 is threaded to the inner wall of the receiving groove 24. A sleeve 5 is fixedly installed at the top of the sampling head 4. The outer diameter of the sleeve 5 is slightly smaller than the diameter of the receiving groove 24, so that the tubular receiving bag 6 fitted on the sleeve 5 can smoothly enter the left half-pipe 2 and the right half-pipe 3. When installed, the sleeve 5 extends a certain distance into the left half-pipe 2 and the right half-pipe 3 to prevent sediments entering the left half-pipe 2 and the right half-pipe 3 from being squeezed into the receiving tank 24. A replaceable tubular receiving bag 6 is fitted on the outer surface of the sleeve 5. The tubular receiving bag 6 is made of wear-resistant and tear-resistant TPU (thermoplastic polyurethane) material. A top plate 7 is fixedly installed at one end of the tubular receiving bag 6. Several through holes are evenly opened on the top plate 7. River water entering the tubular receiving bag 6 will be discharged through the through holes on the top plate 7. At the same time, the river water discharged into the left half-pipe 2 and the right half-pipe 3 can be discharged to the outside through the one-way valve 34 to prevent river water from filling the tubular receiving bag 6 and affecting the sediment containment effect. A limiting mechanism is installed on the top plate 1 to limit the top plate 7.

[0039] In this embodiment, the limiting mechanism includes a mounting groove 15 formed on the upper surface of the top plate 1. Two clamping blocks 17 are symmetrically slidably mounted on the inner wall of the mounting groove 15. A retaining groove 18 is formed on the outer surface of each adjacent side of the two clamping blocks 17. A first spring rod 19 is fixedly installed between the ends of the two clamping blocks 17 that are far apart from each other and the inner wall of the mounting groove 15. A fixing post 9 is fixedly installed on the top of the top plate 7. A retaining ring 10 is fixedly installed on the top of the fixing post 9. A circular hole for the retaining ring 10 to pass through is formed on the lower surface of the top plate 1. The retaining groove 18 has a flared hole structure. A synchronization component is installed between the two clamping blocks 17. The synchronization component includes a rack 16 fixedly installed on the outer surface of the two clamping blocks 17 that are far apart from each other. One end of the rack 16 is set through the outer surface of the top plate 1. An end cover 11 is fixedly installed on the top of the top plate 1. A synchronization gear 21 is rotatably installed on the lower surface of the end cover 11. The rack 16 meshes with the synchronization gear 21.

[0040] When the sediment pushes the top plate 7 upward to the clamping block 17, the retaining ring 10 installed at the top of the top plate 7 will be inserted into the clamping groove 18. Since the clamping groove 18 has a funnel hole structure, the retaining ring 10 can push the clamping block 17 to both sides through the clamping groove 18, so that the retaining ring 10 passes over the clamping block 17 and moves above it. After the retaining ring 10 moves above the clamping block 17, the clamping block 17, which was pushed to both sides, will be reset under the elastic force of the first spring rod 19, thereby blocking the retaining ring 10 and preventing the retaining ring 10 from pressing down further. This achieves the lifting effect on the tubular containment bag 6 and prevents the tubular containment bag 6 and the sediment collected inside it from slipping out of the left half tube 2 and the right half tube 3 when the device is retrieved.

[0041] In this embodiment, a resistance ring 8 is fixedly installed on the inner wall of the receiving groove 24 opened on the left half tube 2. The resistance ring 8 can be sleeved on the outside of the sleeve 5. In use, the resistance ring 8 wraps around the outside of the tubular receiving bag 6, so that the resistance ring 8 can increase the friction on the surface of the tubular receiving bag 6, ensuring that the tubular receiving bag 6 can be released synchronously with the deposits that enter.

[0042] In this embodiment, a locking mechanism is installed between the sampling head 4 and the left half tube 2 and the right half tube 3. The locking mechanism includes a plurality of limiting posts 23 that are uniformly fixedly installed at the ends of the left half tube 2 and the right half tube 3 away from the top plate 1. The outer surface of the threaded connection of the sampling head 4 is provided with an annular groove 22 for wrapping the plurality of limiting posts 23.

[0043] When in use, place the sampling head 4 in the receiving groove 24 of the left half tube 2 and close the right half tube 3 so that the left half tube 2 and the right half tube 3 are combined into a complete sampling tube. Then rotate the sampling head 4. Since the sampling head 4 is threadedly connected to the inner wall of the receiving groove 24, the connecting section of the sampling head 4 can enter the receiving groove 24. At the same time, several limiting posts 23 installed at the ends of the left half tube 2 and the right half tube 3 will gradually be inserted into the annular groove 22 opened on the sampling head 4 to limit the several limiting posts 23 and achieve the locking effect of the ends of the left half tube 2 and the right half tube 3.

[0044] In this embodiment, a locking mechanism is installed between the left half-tube 2 and the right half-tube 3 on the sides opposite to the hinge side. The locking mechanism includes multiple locking slots 26 evenly opened on the side of the left half-tube 2 opposite to the hinge side. Multiple locking blocks 31 corresponding to the locking slots 26 are evenly fixedly installed on the side of the right half-tube 3 away from the hinge side. The outer surface of the locking block 31 is provided with an insertion hole. The outer surface of the left half-tube 2 near each locking slot 26 is provided with a sliding groove 27. The inner wall of the sliding groove 27 is slidably installed with a corresponding insertion hole. A matching pin 28 is provided, and a connecting rod 29 is fixedly installed between multiple pins 28. A top ring 30 for pushing the connecting rod 29 to move is fixedly installed on the outer surface of the sampling head 4. A reset assembly is installed between the connecting rod 29 and the top plate 1. The reset assembly includes a second spring rod 33 fixedly installed between the top plate 1 and the end of the connecting rod 29. A cover sleeve 32 is fixedly installed on the outer surface of the left half tube 2 near the connecting rod 29. The second spring rod 33 and the connecting rod 29 are both installed inside the cover sleeve 32.

[0045] While tightening the sampling head 4, the top ring 30 fixedly installed on the outside of the sampling head 4 pushes the bottom end of the connecting rod 29 upward, causing the connecting rod 29 to drive multiple pins 28 to move upward synchronously, so that the pins 28 are inserted into the insertion holes on the multiple locking blocks 31 installed on the side of the right half-pipe 3, so that the pins 28 lock the locking blocks 31, thereby achieving the locking effect on the sides of the left half-pipe 2 and the right half-pipe 3, preventing the sediment entering the left half-pipe 2 and the right half-pipe 3 from expanding the left half-pipe 2 and the right half-pipe 3, affecting the normal sampling operation of the sediment.

[0046] In this embodiment, a plurality of ball bearings 25 for straightening the tubular containment bag 6 are evenly rolled on the inner wall of the receiving groove 24 near the resistance ring 8. By setting a circumference of ball bearings 25, the ball bearings 25 can roll along the surface of the tubular containment bag 6, applying a certain pulling force to the tubular containment bag 6, thereby achieving the straightening effect of the tubular containment bag 6, so as to better contain the sediment.

[0047] In this embodiment, a vibration motor 12 is fixedly installed on the top of the end cover 11, and a sealing cover 13 is also fixedly installed on the top of the end cover 11. The vibration motor 12 is installed inside the sealing cover 13, and a hanging ring 14 is fixedly installed on the top of the sealing cover 13. A touch switch 20 is also fixedly installed on the lower surface of the end cover 11, and the touch switch 20 is located between two clamping blocks 17.

[0048] After the retaining ring 10 is lifted to the top by the sediment, the retaining ring 10 will contact the trigger switch 20, causing the trigger switch 20 to stop the operation of the vibration motor 12, and alerting the sampling personnel on shore (or on the ship) that the sampling is complete, so that the device can be retrieved in time. In this solution, the control method of the electrical components is controlled by its matching peripheral controller, and the control circuit can be implemented by those skilled in the art through simple programming. It is common knowledge in the field, and is only used without modification. Furthermore, since this invention is mainly used to protect mechanical devices, the control method and circuit connection will not be explained in detail.

[0049] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects: Before sampling underwater sediments, a tubular receiving bag 6 for containing sediment samples is placed on the surface of the sleeve 5 stacked on the sampling head 4, and the top plate 7 is placed over the opening of the sleeve 5. At this time, the sampling head 4 is placed in the receiving groove 24 of the left half tube 2, and the right half tube 3 is closed, so that the left half tube 2 and the right half tube 3 are combined into a complete sampling tube. Then the sampling head 4 is rotated. Since the sampling head 4 is threadedly connected to the inner wall of the receiving groove 24, the connecting section of the sampling head 4 can enter the receiving groove 24. At the same time, a number of limiting posts 23 installed at the ends of the left half tube 2 and the right half tube 3 will gradually be inserted into the annular groove 22 opened on the sampling head 4 to limit the number of limiting posts 23, thereby achieving the locking effect on the ends of the left half tube 2 and the right half tube 3.

[0050] While tightening the sampling head 4, the top ring 30 fixedly installed on the outside of the sampling head 4 pushes the bottom end of the connecting rod 29 upward, causing the connecting rod 29 to drive multiple pins 28 to move upward synchronously, so that the pins 28 are inserted into the insertion holes on the multiple locking blocks 31 installed on the side of the right half-pipe 3, so that the pins 28 lock the locking blocks 31, thereby achieving the locking effect on the sides of the left half-pipe 2 and the right half-pipe 3, preventing the sediment entering the left half-pipe 2 and the right half-pipe 3 from expanding the left half-pipe 2 and the right half-pipe 3, affecting the normal sampling operation of the sediment;

[0051] During sampling, the hoisting rope of the hoisting equipment is tied to the hanging ring 14 at the top of the sealing cover 13. By releasing the hoisting rope, the entire device is lowered into the water area to be sampled. After the sampling head 4 touches the bottom, the vibration motor 12 is started, causing the vibration of the vibration motor 12 to drive the sampling head 4, the left half-tube 2, and the right half-tube 3 to be inserted into the sediment at the bottom of the water. When the sediment enters the left half-tube 2 and the right half-tube 3, the sediment will abut against the top plate 7. As the device continues to be inserted, the sediment entering the left half-tube 2 and the right half-tube 3 will push the top plate 7 upward. At the same time, the top plate 7 will drive the tubular collection bag 6 fitted on the sleeve 5 to be slowly released, allowing the sediment to settle. The sediment can be collected inside the tubular containment bag 6 so that after sampling is completed and the device is retrieved, and the right half-tube 3 is opened, the opening of the tubular containment bag 6 can be directly tied with a cable tie, and the tubular containment bag 6 and the sediment inside can be directly pulled out of the left half-tube 2. This facilitates the collection of sediment samples. The sediment is wrapped and collected by the tubular containment bag 6, which makes it convenient to pack and transport the sediment directly afterward. Furthermore, the tubular containment bag 6 separates the sediment from the left half-tube 2 and the right half-tube 3, which can prevent the sediment from adhering to the inner walls of the left half-tube 2 and the right half-tube 3, eliminating the need for subsequent cleaning operations and making it more convenient to use.

[0052] When the sediment pushes the top plate 7 up to the clamping block 17, the retaining ring 10 installed at the top of the top plate 7 will be inserted into the clamping groove 18. Since the clamping groove 18 has a funnel hole structure, the retaining ring 10 can push the clamping block 17 to both sides through the clamping groove 18, so that the retaining ring 10 passes over the clamping block 17 and moves above it. After the retaining ring 10 moves up to the top of the clamping block 17, the clamping block 17, which was pushed to both sides, will be reset under the elastic force of the first spring rod 19, thereby blocking the retaining ring 10 and preventing the retaining ring 10 from continuing to press down, thus achieving the lifting effect on the tubular collection bag 6 and preventing the tubular collection bag 6 and the sediment collected inside it from slipping out of the left half tube 2 and the right half tube 3 when the device is retrieved.

[0053] When retrieving the device and needing to remove the tubular containment bag 6, place the device flat on the ground, rotate and remove the sampling head 4, so that the annular groove 22 on the sampling head 4 no longer limits the multiple limiting posts 23, and at the same time, the top ring 30 no longer presses against the connecting rod 29, so that the connecting rod 29 is reset under the elastic force of the second spring rod 33, so that the multiple pins 28 are pulled out from the locking block 31 and no longer lock the locking block 31, thus completing the unlocking operation of the left half tube 2 and the right half tube 3. By pushing the end of any rack 16, since the two racks 16 are meshed and driven by the synchronous gear 21, the two racks 16 can simultaneously drive the two clamping blocks 17 to open to both sides. At this time, the fixing post 9 and the retaining ring 10 can be pulled out, thus completing the removal operation of the tubular containment bag 6.

[0054] Since the sediments entering the left half-pipe 2 and right half-pipe 3 are squeezed in, there will be a certain squeezing force between the sediments and the inner walls of the left half-pipe 2 and right half-pipe 3, so that the sediments entering the left half-pipe 2 and right half-pipe 3 will not fall out of the tubular collection bag 6 when the device is being salvaged.

[0055] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A sediment sampling device for aquatic ecological surveys comprising a top disc (1), characterised in that, The lower surface of the top disc (1) is fixedly installed with a left half pipe (2), one side of the left half pipe (2) is hingedly connected with a right half pipe (3), the left half pipe (2) and the right half pipe (3) can be folded into an integral pipe, and the outer surfaces of the left half pipe (2) and the right half pipe (3) close to the top disc (1) are both fixedly installed with a one-way valve (34) penetrating through, and the sampling head (4) for fixing the left half pipe (2) and the right half pipe (3) is further arranged, the sampling head (4) is a conical tubular structure, the inner walls of the left half pipe (2) and the right half pipe (3) away from the top disc (1) are both provided with an accommodating groove (24), the sampling head (4) is threadedly connected with the inner wall of the accommodating groove (24), the top end of the sampling head (4) is fixedly installed with a sleeve pipe (5), the outer surface of the sleeve pipe (5) is sleeved with a replaceable tubular containing bag (6), one end of the tubular containing bag (6) is fixedly installed with a top plate (7), a plurality of through holes are uniformly and penetratingly formed in the top plate (7), the top disc (1) is installed with a limiting mechanism for limiting the top plate (7), the limiting mechanism comprises an installation groove (15) formed in the upper surface of the top disc (1), two clamping blocks (17) are symmetrically and slidingly installed on the inner wall of the installation groove (15), the outer surfaces of the adjacent sides of the two clamping blocks (17) are both provided with a clamping groove (18), the first spring rods (19) are fixedly installed between the distal ends of the two clamping blocks (17) away from each other and the inner wall of the installation groove (15), the top end of the top plate (7) is fixedly installed with a fixing column (9), the top end of the fixing column (9) is fixedly installed with a blocking ring (10), the lower surface of the top disc (1) is penetratingly provided with a circular hole for the blocking ring (10) to pass through, the clamping groove (18) is a horn hole structure, the inner wall of the accommodating groove (24) formed in the left half pipe (2) is fixedly installed with a resistance ring (8), the resistance ring (8) can be sleeved outside the sleeve pipe (5), the sampling head (4) and the left half pipe (2) and the right half pipe (3) are installed with a locking mechanism, the locking mechanism comprises a plurality of limiting columns (23) uniformly and fixedly installed at the distal ends of the left half pipe (2) and the right half pipe (3) away from the top disc (1), the outer surface of the sampling head (4) is threadedly connected with an annular groove (22) for wrapping the plurality of limiting columns (23), the left half pipe (2) and the right half pipe (3) are installed with a locking edge mechanism between the sides opposite to the hinged sides, the locking edge mechanism comprises a plurality of lock slot grooves (26) uniformly formed in the sides of the left half pipe (2) opposite to the hinged sides, the sides of the right half pipe (3) away from the hinged sides are uniformly and fixedly installed with a plurality of lock blocks (31) corresponding to the lock slot grooves (26), the outer surface of the lock block (31) is penetratingly provided with a jack hole, the outer surface of the left half pipe (2) close to each lock slot groove (26) is provided with a sliding groove (27), the inner wall of the sliding groove (27) is penetratingly and slidingly installed with a plug (28) matched with the jack hole, a connecting rod (29) is fixedly installed between the plurality of plugs (28),The outer surface of the sampling head (4) is fixedly provided with a top ring (30) for pushing the connecting rod (29) to move, a reset assembly is installed between the connecting rod (29) and the top disc (1), the reset assembly comprises a second spring rod (33) fixedly installed between the top disc (1) and the end of the connecting rod (29), the left half pipe (2) is fixedly provided with a cladding sleeve (32) close to the outer surface of the connecting rod (29), and the second spring rod (33) and the connecting rod (29) are both installed inside the cladding sleeve (32), a plurality of rolling balls (25) for straightening the tubular containing bag (6) are uniformly and rollingly installed on the inner wall of the containing groove (24) close to the resistance ring (8), a synchronous assembly is installed between the two clamping blocks (17), the synchronous assembly comprises a rack (16) fixedly installed on the outer surfaces of the two clamping blocks (17) away from each other, one end of the rack (16) penetrates through the outer surface of the top disc (1), an end cover (11) is fixedly installed on the top end of the top disc (1), a synchronous gear (21) is rotatably installed on the lower surface of the end cover (11), the rack (16) is engaged with the synchronous gear (21), a vibration motor (12) is fixedly installed on the top end of the end cover (11), a sealing cover (13) is also fixedly installed on the top end of the end cover (11), the vibration motor (12) is installed inside the sealing cover (13), a hanging ring (14) is fixedly installed on the top end of the sealing cover (13), the lower surface of the end cover (11) is also fixedly provided with a touch switch (20), and the touch switch (20) is located between the two clamping blocks (17).

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