Sediment sampling device for water ecology investigation

Abstract

The invention relates to the technical field of sampling devices, and discloses a sediment sampling device for water ecology investigation, which comprises a top tray, a left half tube is fixedly mounted on the lower surface of the top tray, a right half tube is hinged to one side edge of the left half tube, and the left half tube and the right half tube can be folded into a whole tube. One-way valves are fixedly mounted on the outer surfaces, close to the top tray, of the left half tube and the right half tube in a penetrating manner, and the sampling head is of a conical tubular structure and is used for fixing the left half tube and the right half tube. Sediments are collected through the tubular containing bag, so that after the device is fished out after sampling is completed and the right half tube is opened, the bag opening of the tubular containing bag can be directly tightened by using the ribbon, and the tubular containing bag and the sediments in the tubular containing bag are directly lifted out of the left half tube together, so that collected sediment samples are conveniently collected; sediments are wrapped and collected through the tubular containing bag, and subsequent direct packaging and transferring of the sediments are facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of sampling devices, and in particular to a sediment sampling device for water ecological investigation. Background Art

[0002] With the development of science and technology, pollutants generated by various production processes are often eventually discharged into water bodies, thus causing water pollution. Pollutants will eventually settle on the bottom of the water and mix with silt and gravel. When repairing and protecting the water environment, it is currently necessary to detect the water environment first, which includes the process of sampling the bottom sediments. Currently, the bottom sediment sampling is usually done by inserting pipe equipment into the bottom of the water for suction, or sinking the pipe so that the sediment is stuffed inside and then lifted up for sampling.

[0003] The existing columnar sample sampler for shallow water sediment (Announcement No.: CN2419591Y) has at least the following drawbacks: The above patent uniformly applies downward force when the sampling tube contacts the interface of the sediment, so that the sampling tube slowly enters the sediment. After inserting to the set sediment thickness, the sealing block and the sealing pad are put down in time. At this time, the sealing pad is pressed on the outer top surface of the joint cover by the weight of the sealing block to block the through hole on the joint cover and close the water vapor channel at the top of the sampling tube. Finally, the sampler is slowly lifted up so that the complete and original columnar sample of the sediment is trapped in the sampling tube; but when taking out the sample, it is necessary to first seal the bottom end of the sample column with a rubber plug so as to unscrew the sampling tube; then use a sample splitting top support rod whose size and shape match the sampling tube to push the sample column upward, which makes it more troublesome to take out the sediment sample, and after pushing out the sample column, it is necessary to use a separate packaging container to accommodate it. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a sediment sampling device for water ecological investigation.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A sediment sampling device for water ecological investigation comprises a top plate, a left half-tube is fixedly installed on the lower surface of the top plate, a right half-tube is hinged on one side of the left half-tube, the left half-tube and the right half-tube can be closed into a whole tube, and the outer surfaces of the left half-tube and the right half-tube close to the top plate are penetrated and fixedly installed with a one-way valve, and also comprises a sampling head for fixing the left half-tube and the right half-tube, the sampling head is a conical tubular structure, the inner walls of the left half-tube and the right half-tube away from one end of the top plate are provided with a receiving groove, the sampling head is threadedly connected to the inner wall of the receiving groove, a sleeve is fixedly installed on the top of the sampling head, a replaceable tubular receiving bag is sleeved on the outer surface of the sleeve, a top plate is fixedly installed on one end of the tubular receiving bag, a plurality of through holes are evenly penetrated on the top plate, and a limiting mechanism for limiting the top plate is installed on the top plate.

[0007] As a further solution of the present invention, the limiting mechanism includes a mounting groove opened on the upper surface of the top plate, and two clamping blocks are symmetrically and slidably installed on the inner wall of the mounting groove, and the outer surfaces of the adjacent sides of the two clamping blocks are provided with holding grooves, and a first spring rod is fixedly installed between the ends of the two clamping blocks that are away from each other and the inner wall of the mounting groove, a fixing column is fixedly installed on the top of the top plate, and a retaining ring is fixedly installed on the top of the fixing column, and a circular hole for the retaining ring to pass through is opened through the lower surface of the top plate, and the holding groove is a horn hole structure.

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

[0009] As a further solution of the present invention, a locking mechanism is installed between the sampling head and the left half pipe and the right half pipe, and the locking mechanism includes a plurality of limit columns evenly fixedly installed on the end of the left half pipe and the right half pipe away from the top plate, and the outer surface of the threaded connection of the sampling head is provided with an annular groove for wrapping the plurality of limit columns.

[0010] As a further solution of the present invention, a locking mechanism is installed between the side edges of the left half tube and the right half tube opposite to the hinged side, and the locking mechanism includes a plurality of locking grooves evenly arranged on the side edge of the left half tube opposite to the hinged side, and a plurality of locking blocks corresponding to the locking grooves are evenly and fixedly installed on the side edge of the right half tube away from the hinged side, and a plug hole is penetrated through the outer surface of the locking block, and a slide groove is provided on the outer surface of the left half tube close to each locking groove, and a pin matching the plug hole is slidably installed through the inner wall of the slide groove, and a connecting rod is fixedly installed between the plurality of the pins, and a top ring for pushing the connecting rod to move is fixedly installed on the outer surface of the sampling head, and a reset assembly is installed between the connecting rod and the top plate.

[0011] As a further solution 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 covering sleeve is fixedly installed on the outer surface of the left half pipe close to the connecting rod, and the second spring rod and the connecting rod are both installed inside the covering sleeve.

[0012] As a further solution of the present invention, a plurality of balls for straightening the tubular receiving bag are evenly and rollingly mounted on the inner wall of the receiving groove close to the resistance ring.

[0013] As a further solution of the present invention, a synchronization component is installed between the two clamping blocks, and the synchronization component includes a rack fixedly installed on the outer surface of the two clamping blocks on one side away from each other, one end of the rack is arranged to penetrate the outer surface of the top plate, an end cover is fixedly installed on the top of the top plate, and a synchronization gear is rotatably installed on the lower surface of the end cover, and the rack is meshed with the synchronization gear.

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

[0015] As a further solution of the present invention, a touch switch is fixedly mounted on the lower surface of the end cover, and the touch switch is arranged between the two clamping blocks.

[0016] The beneficial effects of the present invention are:

[0017] 1. Collect the sediment through the tubular receiving bag, so that after the sampling is completed and the device is salvaged and the right half of the tube is opened, the bag mouth of the tubular receiving bag can be directly tied with a cable tie, and the tubular receiving bag and the sediment inside can be directly taken out of the left half of the tube, which is convenient for collecting the collected sediment samples, and the sediment is packaged and collected through the tubular receiving bag, which is convenient for the subsequent direct packaging and transportation of the sediment;

[0018] 2. Separating the sediment from the left and right half pipes through the tubular receiving bag can prevent the sediment from adhering to the inner wall of the left and right half pipes, and no subsequent cleaning operation is required, which is more convenient to use;

[0019] 3. By setting up the left and right half pipes that can be opened and closed, it is convenient to take out the collected sediment samples. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the overall structure of a sediment sampling device for water ecological investigation proposed by the present invention;

[0021] Figure 2 This is a schematic diagram of the structure of a sediment sampling device for water ecological investigation proposed by the present invention, with the right half pipe and the sealing cover removed;

[0022] Figure 3 This is a schematic diagram of the structure of the tubular receiving bag of a sediment sampling device for water ecological investigation proposed by the present invention in the installation state;

[0023] Figure 4 A schematic diagram of the structure of a sampling head of a sediment sampling device for water ecological survey proposed by the present invention;

[0024] Figure 5 This is a schematic diagram of the right half-tube structure of a sediment sampling device for water ecological investigation proposed by the present invention;

[0025] Figure 6 This is a schematic diagram of the connecting rod structure of a sediment sampling device for water ecological investigation proposed by the present invention;

[0026] Figure 7 This is a schematic diagram of the top plate and bottom structure of a sediment sampling device for water ecological investigation proposed by the present invention;

[0027] Figure 8 A schematic diagram of the internal structure of a top plate of a sediment sampling device for water ecological survey proposed by the present invention;

[0028] Fig. 9 This is a schematic diagram of the clamp structure of a sediment sampling device for water ecological investigation proposed by the present invention;

[0029] Fig.10 This is a schematic diagram of the structure of the end cover and the synchronous gear of the sediment sampling device for water ecological investigation proposed by the present invention in the separated state;

[0030] Fig.11 This is a schematic diagram of the right half-tube structure of a sediment sampling device for water ecological investigation proposed by the present invention;

[0031] Fig.12 for Figure 5 A magnified view of the structure at center;

[0032] Fig.13 for Figure 5 A magnified view of the structure at B in the middle;

[0033] Fig.14 for Figure 6 A magnified view of the structure at C in the middle;

[0034] Fig.15 for Fig.11 Enlarged view of the structure at point D in the middle.

[0035] In the figure: 1. top plate; 2. left half pipe; 3. right half pipe; 4. sampling head; 5. sleeve; 6. tubular receiving bag; 7. top plate; 8. resistance ring; 9. fixing column; 10. retaining ring; 11. end cover; 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; 26. locking groove; 27. slide groove; 28. latch; 29. ​​connecting rod; 30. top ring; 31. locking block; 32. covering sleeve; 33. second spring rod; 34. one-way valve. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0037] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0038] See attached Figure 1 -Attached Fig.15, a sediment sampling device for water ecological investigation, comprising a top plate 1, a left half pipe 2 is fixedly installed on the lower surface of the top plate 1, a right half pipe 3 is hinged on 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 the outer surfaces of the left half pipe 2 and the right half pipe 3 close to the top plate 1 are penetrated and fixedly installed with a one-way valve 34, and also comprising a sampling head 4 for fixing the left half pipe 2 and the right half pipe 3, 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 plate 1 are provided with a receiving groove 24, the sampling head 4 is threadedly connected to the inner wall of the receiving groove 24, and a sleeve 5 is fixedly installed on 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 sleeved on the sleeve 5 can smoothly enter the left half pipe 2 and the right half pipe 3; When the sleeve 5 is in the installed state, the length of the sleeve 5 can penetrate a certain distance into the left half pipe 2 and the right half pipe 3 to prevent the sediment entering the left half pipe 2 and the right half pipe 3 from being squeezed into the receiving groove 24. The outer surface of the sleeve 5 is sleeved with a replaceable tubular receiving bag 6, and the tubular receiving bag 6 is made of wear-resistant and damage-resistant TPU (thermoplastic polyurethane) material; a top plate 7 is fixedly installed at one end of the tubular receiving bag 6, and a plurality of through holes are evenly opened on the top plate 7. The river water entering the tubular receiving bag 6 will be discharged from the through holes opened 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 the river water from filling the tubular receiving bag 6 and affecting the receiving effect of the sediment; a limiting mechanism for limiting the top plate 7 is installed on the top plate 1.

[0039] In this embodiment, the limiting mechanism includes a mounting groove 15 opened on the upper surface of the top plate 1, and two clamping blocks 17 are symmetrically and slidably installed on the inner wall of the mounting groove 15. The outer surfaces of the adjacent sides of the two clamping blocks 17 are provided with holding grooves 18, and a first spring rod 19 is fixedly installed between the ends of the two clamping blocks 17 away from each other and the inner wall of the mounting groove 15. A fixing column 9 is fixedly installed on the top of the top plate 7, and a retaining ring 10 is fixedly installed on the top of the fixing column 9. A circular hole for the retaining ring 10 to pass through is opened on the lower surface of the top plate 1, and the holding groove 18 is a trumpet hole structure; a synchronization component is installed between the two clamping blocks 17, and the synchronization component includes a rack 16 fixedly installed on the outer surface of the side away from each other of the two clamping blocks 17, and one end of the rack 16 is arranged to penetrate the outer surface of the top plate 1, and an end cover 11 is fixedly installed on the top of the top plate 1, and a synchronization gear 21 is rotatably installed on the lower surface of the end cover 11, and the rack 16 is meshed with the synchronization gear 21.

[0040] When the sediment pushes the top plate 7 to move up to the clamping block 17, the retaining ring 10 installed on the top of the top plate 7 will be inserted into the holding groove 18. Since the holding groove 18 is a trumpet hole structure, the retaining ring 10 can push the clamping block 17 to both sides through the holding groove 18, so that the retaining ring 10 passes over the clamping block 17 to the top. After the retaining ring 10 moves up to the top of the clamping block 17, the clamping block 17 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, thereby achieving a lifting effect on the tubular receiving bag 6, and preventing the tubular receiving bag 6 and the sediment collected therein from sliding out of the left half pipe 2 and the right half pipe 3 when the device is salvaged.

[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 pipe 2, and the resistance ring 8 can be sleeved on the outside of the sleeve 5; when in use, the resistance ring 8 is wrapped around the outside of the tubular receiving bag 6, so that the resistance ring 8 can increase the friction force on the surface of the tubular receiving bag 6, ensuring that the tubular receiving bag 6 can be released synchronously with the incoming sediment.

[0042] In this embodiment, a locking mechanism is installed between the sampling head 4 and the left half pipe 2 and the right half pipe 3. The locking mechanism includes a plurality of limit posts 23 evenly fixedly installed on the end of the left half pipe 2 and the right half pipe 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 limit posts 23.

[0043] When in use, 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, and 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 columns 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, and the number of limiting columns 23 will be limited to achieve a locking effect on 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 side edges of the left half tube 2 and the right half tube 3 opposite to the hinged side. The locking mechanism includes a plurality of locking grooves 26 evenly arranged on the side edge of the left half tube 2 opposite to the hinged side. A plurality of locking blocks 31 corresponding to the locking grooves 26 are evenly and fixedly installed on the side edge of the right half tube 3 away from the hinged side. An insertion hole is penetrated through the outer surface of the locking block 31. A sliding groove 27 is provided on the outer surface of the left half tube 2 near each locking groove 26. A sliding groove 27 is slidably installed on the inner wall of the sliding groove 27. A plug 28 is matched with the hole, and a connecting rod 29 is fixedly installed between multiple plugs 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 component is installed between the connecting rod 29 and the top plate 1. The reset component includes a second spring rod 33 fixedly installed between the top plate 1 and the end of the connecting rod 29. A covering sleeve 32 is fixedly installed on the outer surface of the left half pipe 2 near the connecting rod 29, and the second spring rod 33 and the connecting rod 29 are both installed inside the covering sleeve 32.

[0045] While tightening the sampling head 4, the top ring 30 fixedly installed on the outside of the sampling head 4 will push the bottom end of the connecting rod 29 upward, so that the connecting rod 29 drives multiple pins 28 to move upward synchronously, so that the pins 28 are inserted into the sockets on 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 balls 25 for straightening the tubular receiving bag 6 are evenly and rollingly installed on the inner wall of the receiving groove 24 close to the resistance ring 8; by arranging a circle of balls 25, the balls 25 can roll along the surface of the tubular receiving bag 6, exerting a certain pulling effect on the tubular receiving bag 6, thereby achieving a straightening effect on the tubular receiving bag 6, so as to better accommodate the sediment.

[0047] In this embodiment, a vibration motor 12 is fixedly installed on the top of the end cover 11, 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, a hanging ring 14 is fixedly installed on the top of the sealing cover 13, and a touch switch 20 is also fixedly installed on the lower surface of the end cover 11, and the touch switch 20 is arranged between the 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 touch switch 20, causing the touch switch 20 to stop the operation of the vibration motor 12, and remind the sampling personnel on the shore (or on the ship) through the alarm that the sampling is completed, so as to salvage the device in time; the control method of the electrical components in this scheme is controlled by an external controller matched therewith, and the control circuit can be realized by simple programming by technicians in this field, which is common knowledge in the field and is only used without improvement. In addition, the present invention is mainly used to protect mechanical devices, so the present invention will no longer explain the control method and circuit connection in detail.

[0049] From the above description, it can be seen that the above-mentioned embodiment of the present invention achieves the following technical effects: before sampling of underwater sediments is required, the tubular receiving bag 6 for receiving sediment samples is sleeved on the surface of the sleeve 5 stacked on the sampling head 4, and the top plate 7 is covered on the pipe mouth of the sleeve 5. At this time, the sampling head 4 is placed in the receiving groove 24 of the left half pipe 2, and the right half pipe 3 is closed, so that the left half pipe 2 and the right half pipe 3 are combined into a complete sampling tube, and 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, the plurality of limiting columns 23 installed at the ends of the left half pipe 2 and the right half pipe 3 will gradually be inserted into the annular groove 22 opened on the sampling head 4, and the plurality of limiting columns 23 are limited to achieve the locking effect of the ends of the left half pipe 2 and the right half pipe 3;

[0050] When the sampling head 4 is tightened, the top ring 30 fixedly installed on the outside of the sampling head 4 pushes the bottom end of the connecting rod 29 upward, so that the connecting rod 29 drives the multiple latches 28 to move upward synchronously, so that the latches 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 latches 28 lock the locking blocks 31, thereby achieving the locking effect of the sides of the left half pipe 2 and the right half pipe 3, and 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, thereby affecting the normal sampling operation of the sediment;

[0051] During sampling, the lifting rope of the lifting equipment is tied to the hanging ring 14 on the top of the sealing cover 13, and the device is controlled to sink into the water area to be sampled by releasing the lifting rope. After the sampling head 4 touches the bottom, the vibration motor 12 is started, so that the vibration of the vibration motor 12 drives the sampling head 4, the left half pipe 2 and the right half pipe 3 to be inserted into the sediment on the bottom of the water as a whole. When the sediment enters the left half pipe 2 and the right half pipe 3, the sediment will be against the top plate 7. As the device is continuously inserted, the sediment entering the left half pipe 2 and the right half pipe 3 will push the top plate 7 to move upward. At the same time, the top plate 7 will drive the tubular receiving bag 6 set on the casing 5 to be slowly released, so that the sediment The sediment can enter the tubular receiving bag 6 for collection, so that after the sampling is completed and the device is salvaged and the right half pipe 3 is opened, the bag mouth of the tubular receiving bag 6 can be directly tied with a cable tie, and the tubular receiving bag 6 and the sediment inside can be directly lifted out of the left half pipe 2, which is convenient for collecting the collected sediment samples. The sediment is wrapped and collected by the tubular receiving bag 6, which is convenient for subsequent direct packaging and transportation of the sediment. The sediment is separated from the left half pipe 2 and the right half pipe 3 by the tubular receiving bag 6, which can prevent the sediment from adhering to the inner walls of the left half pipe 2 and the right half pipe 3, and no subsequent cleaning operation is required, which is more convenient to use.

[0052] When the sediment pushes the top plate 7 to move up to the clamping block 17, the retaining ring 10 installed on the top of the top plate 7 will be inserted into the holding groove 18. Since the holding groove 18 is a trumpet hole structure, the retaining ring 10 can push the clamping block 17 to both sides through the holding groove 18, so that the retaining ring 10 passes over the clamping block 17 to the top. After the retaining ring 10 moves up to the top of the clamping block 17, the clamping block 17 pushed to both sides will be reset under the elastic force of the first spring rod 19, thereby blocking the retaining ring 10, so that the retaining ring 10 can no longer continue to press down, thereby achieving a lifting effect on the tubular receiving bag 6, and preventing the tubular receiving bag 6 and the sediment collected therein from sliding out of the left half pipe 2 and the right half pipe 3 when the device is salvaged;

[0053] When the device is salvaged and the tubular receiving bag 6 needs to be taken out, the device is laid flat on the ground, and the sampling head 4 is rotated and removed, so that the annular groove 22 provided on the sampling head 4 no longer limits the multiple limiting columns 23, and at the same time, the top ring 30 no longer supports 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 latches 28 are pulled out from the locking block 31, and the locking block 31 is no longer locked, and the unlocking operation of the left half pipe 2 and the right half pipe 3 is completed; by pushing the end of any rack 16, due to the meshing transmission between the two racks 16 through the synchronous gear 21, the two racks 16 can simultaneously drive the two clamping blocks 17 to open to both sides, and at this time, the fixing column 9 and the retaining ring 10 can be pulled out, and the removal operation of the tubular receiving bag 6 is completed;

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

[0055] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A sediment sampling device for water ecological survey, comprising a top plate (1), characterized in that: A left half pipe (2) is fixedly mounted on the lower surface of the top plate (1), a right half pipe (3) is hingedly mounted on one side of the left half pipe (2), the left half pipe (2) and the right half pipe (3) can be folded into a whole pipe, and a one-way valve (34) is fixedly mounted through the outer surface of the left half pipe (2) and the right half pipe (3) near the top plate (1), and a sampling head (4) for fixing the left half pipe (2) and the right half pipe (3) is also included, the sampling head (4) is a conical tubular structure, the left half pipe (2) and the right half pipe (3) are connected to each other through the outer surface of the left half pipe (2) and the right half pipe (3) ) is provided with a receiving groove (24) on the inner wall at one end away from the top plate (1), the sampling head (4) is threadedly connected to the inner wall of the receiving groove (24), a sleeve (5) is fixedly installed on the top of the sampling head (4), a replaceable tubular receiving bag (6) is sleeved on the outer surface of the sleeve (5), a top plate (7) is fixedly installed on one end of the tubular receiving bag (6), a plurality of through holes are evenly penetrated on the top plate (7), and a limiting mechanism for limiting the top plate (7) is installed on the top plate (1).

2. A sediment sampling device for water ecological survey according to claim 1, characterized in that: The limiting mechanism comprises a mounting groove (15) provided on the upper surface of the top plate (1), two clamping blocks (17) being symmetrically slidably installed on the inner wall of the mounting groove (15), an embracing groove (18) being provided on the outer surface of the adjacent sides of the two clamping blocks (17), a first spring rod (19) being fixedly installed between the ends of the two clamping blocks (17) which are away from each other and the inner wall of the mounting groove (15), a fixing column (9) being fixedly installed on the top end of the top plate (7), a retaining ring (10) being fixedly installed on the top end of the fixing column (9), a circular hole for the retaining ring (10) to pass through being provided through the lower surface of the top plate (1), and the retaining groove (18) being a trumpet hole structure.

3. A sediment sampling device for water ecological survey according to claim 1, characterized in that: A resistance ring (8) is fixedly mounted on the inner wall of the receiving groove (24) opened on the left half pipe (2), and the resistance ring (8) can be sleeved on the outside of the sleeve (5).

4. A sediment sampling device for water ecological survey according to claim 1, characterized in that: A locking mechanism is installed between the sampling head (4) and the left half pipe (2) and the right half pipe (3), and the locking mechanism comprises a plurality of limit posts (23) evenly fixedly installed on the ends of the left half pipe (2) and the right half pipe (3) away from the top plate (1), and an annular groove (22) for wrapping the plurality of limit posts (23) is provided on the threaded outer surface of the sampling head (4).

5. A sediment sampling device for water ecological survey according to claim 4, characterized in that: A locking mechanism is installed between the side edges of the left half tube (2) and the right half tube (3) opposite to the hinged side, and the locking mechanism comprises a plurality of locking grooves (26) uniformly arranged on the side edge of the left half tube (2) opposite to the hinged side; a plurality of locking blocks (31) corresponding to the locking grooves (26) are uniformly fixedly installed on the side edge of the right half tube (3) away from the hinged side; a plug hole is penetrated through the outer surface of the locking block (31); a slide groove (27) is formed on the outer surface of the left half tube (2) near each locking groove (26); a latch (28) matching the latch hole is slidably installed through the inner wall of the slide groove (27); a connecting rod (29) is fixedly installed between the plurality of latches (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); and a reset assembly is installed between the connecting rod (29) and the top plate (1).

6. A sediment sampling device for water ecological survey according to claim 5, characterized in that: The reset assembly comprises a second spring rod (33) fixedly mounted between the top plate (1) and the end of the connecting rod (29); a covering sleeve (32) is fixedly mounted on the outer surface of the left half pipe (2) close to the connecting rod (29); the second spring rod (33) and the connecting rod (29) are both mounted inside the covering sleeve (32).

7. A sediment sampling device for water ecological survey according to claim 3, characterized in that: A plurality of rolling balls (25) for straightening the tubular receiving bag (6) are evenly and rollingly mounted on the inner wall of the receiving groove (24) close to the resistance ring (8).

8. The sediment sampling device for water ecological survey according to claim 2, characterized in that: A synchronization component is installed between the two clamping blocks (17), and the synchronization component comprises a rack (16) fixedly installed on the outer surface of one side of the two clamping blocks (17) away from each other, one end of the rack (16) is arranged to penetrate 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), and the rack (16) is meshed with the synchronization gear (21).

9. A sediment sampling device for water ecological survey according to claim 8, characterized in that: A vibration motor (12) is fixedly mounted on the top of the end cover (11), a sealing cover (13) is also fixedly mounted 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 mounted on the top of the sealing cover (13).

10. The sediment sampling device for water ecological survey according to claim 8, characterized in that: A touch switch (20) is also fixedly mounted on the lower surface of the end cover (11), and the touch switch (20) is arranged between the two clamping blocks (17).

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