Lake sediment collecting device

Abstract

The invention discloses a lake sediment collection device, and relates to the field of sample collection. The shovel body is inserted into the surface layer of bottom mud through the wedge-shaped feeding port, axial pressure is exerted while the shovel body is driven by the driving device to rotate, the bottom mud located inside and outside the shovel body is cut through the cutting edges arranged on the feeding port and the groove when the shovel body rotates, and the shovel body is driven by the axial pressure to be inserted into the deep position of the bottom mud when the shovel body rotates. Water or air in the sample storage pipe is discharged through the drain holes in the side wall of the sample storage pipe, so that a mud column separated from external bottom mud is formed in the shovel body and the sample storage pipe, the anti-falling structure on the inner side wall of the sample storage pipe can prevent the mud column from being separated in the lifting process, and it is guaranteed that the bottom mud column in the sample storage pipe can be smoothly lifted out of the water surface. The bottom mud collecting device is inserted into bottom mud for sampling by means of rotation and axial pressure when collecting the bottom mud, can adapt to the bottom mud with different textures, reduces the collecting difficulty of the bottom mud, and improves the collecting efficiency of the bottom mud.

Description

Technical Field

[0001] This invention relates to the field of sample collection, and in particular to a device for collecting lake sediment. Background Technology

[0002] Lake sediment sampling methods can generally be divided into two types: surface sampling and columnar sampling. Surface sampling commonly uses grab buckets, Petersen samplers, etc., which are operated by a robotic arm or by manual submersion at the bottom of the water. However, sediment samples are easily washed out of the sampler by the water flow during the lifting process, making sampling difficult and requiring high sampling skills. Columnar sampling uses gravity columnar samplers, vibrating piston samplers, etc., to vertically insert the sampling tube into the sediment by gravity impact or mechanical vibration. It can collect continuous columnar samples of tens of centimeters. However, in hard sediments or gravelly areas, it is difficult to insert the sampling tube into the sediment by impact or vibration, thus making it impossible to complete the sediment sampling work. Summary of the Invention

[0003] The purpose of this invention is to provide a lake sediment collection device to solve the problems existing in the prior art, reduce the sampling difficulty, and improve the sediment collection efficiency.

[0004] To achieve the above objectives, the present invention provides the following solution: The present invention provides a lake bottom sediment collection device, including a driving device and a sediment collector body. The output end of the driving device is connected to the sediment collector body for transmission. The sediment collector body includes a sample storage tube and a tubular shovel. The side wall of the sample storage tube is provided with drainage holes and an anti-fall-off structure. The shovel body is coaxially disposed at one end of the sample storage tube, and the other end of the sample storage tube is connected to the output end of the driving device. The side of the shovel body is provided with a groove along its axial direction. The groove penetrates the side wall of the shovel body along the thickness direction. A wedge-shaped feed inlet is provided at the end of the shovel body away from the sample storage tube. The end of the groove away from the sample storage tube is connected to the feed inlet. Cutting edges are provided on the edge of the feed inlet and the edge of the groove.

[0005] In one embodiment, a threaded guide groove is provided on the inner sidewall of the shovel body.

[0006] In one embodiment, a protective cover is also included, which is fitted over the outside of the mud sampler body and is slidably connected to the mud sampler body.

[0007] In one embodiment, the protective cover has an opening at one end near the feed inlet, and a sealing plate is provided at the other end of the protective cover near the drive device. The sealing plate has a guide hole, and the output end of the drive device passes through the guide hole and is connected to the sample storage tube.

[0008] In one embodiment, the driving device includes a power source and a linkage assembly. The linkage assembly includes a limiting rod and an extension rod. One end of the limiting rod is connected to the end of the sample storage tube, and the other end is connected to the power source through the extension rod.

[0009] In one embodiment, a limit plate is provided at one end of the limit rod near the extension rod, and a limit switch is provided on the outside of the sealing plate. The limit switch is electrically connected to the power source.

[0010] In one embodiment, the power source is a geared motor, and the output end of the geared motor is detachably connected to the extension rod.

[0011] In one embodiment, a movable cover is provided at the end of the sample storage tube near the power source, and the end of the limiting rod is connected to the movable cover.

[0012] In one embodiment, helical blades are provided on the outer surface of the shovel body.

[0013] In one embodiment, the anti-drop structure is a backstop tooth, which includes a tapered tooth post with the tip of the tooth post inclined toward the direction of the driving device and disposed on the inner sidewall of the sample storage tube.

[0014] The present invention achieves the following technical effects compared to the prior art: During sampling, a wedge-shaped inlet is used to insert the shovel into the surface of the bottom sediment. A drive mechanism rotates the shovel while applying axial pressure. As the shovel rotates, cutting edges on the inlet and groove cut the sediment inside and outside the shovel, separating the sediment within the shovel from the outer sediment. The axial pressure drives the shovel deeper into the sediment, forming a mud column separated from the outer sediment inside the shovel and the sample collection tube. As the insertion depth increases, water or air in the sample collection tube is drained through drainage holes on its side wall, allowing the mud column to enter smoothly, thus completing the sediment collection. After reaching the predetermined insertion depth, the sample collection tube and shovel are lifted upwards. An anti-detachment structure on the inner wall of the sample collection tube prevents the mud column from detaching during lifting, ensuring the sediment is successfully brought to the surface. This sediment collection device relies on rotation and axial pressure to insert into the sediment for sampling. It can adapt to sediments of different textures, reducing the difficulty of sediment collection. Furthermore, an anti-detachment structure is installed in the sample storage tube to prevent the sediment from falling out of the tube during the lifting process, thereby improving the sediment collection efficiency. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall structure of the mud-collecting device in an embodiment of the present invention; Figure 2This is a schematic diagram of the structure of the mud sampler body in an embodiment of the present invention; Figure 3 This is a schematic diagram of the linkage assembly in an embodiment of the present invention; Figure 4 This is a schematic diagram of the power source structure in an embodiment of the present invention; The components include: 1. Power source; 2. Connecting rod assembly; 3. Mud sampler body; 4. Sample storage tube; 5. Shovel body; 6. Feed inlet; 7. Protective cover; 8. Backstop tooth; 9. Drainage hole; 10. Guide groove; 11. Extension rod; 12. Limiting rod; 13. Limiting plate; 14. Limiting switch; 15. Movable cover plate; 16. Manual rotating rod; 17. Double concave square sleeve; 18. Gear motor; 19. Square ball joint; 20. Control panel. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] The purpose of this invention is to provide a lake sediment collection device to solve the problems existing in the prior art, reduce the sampling difficulty, and improve the sediment collection efficiency.

[0019] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] Please refer to Figures 1 to 4This embodiment provides a lake bottom sediment collection device, including a drive device and a sediment collector body 3. The sediment collector body 3 includes a sample storage tube 4 and a tubular shovel 5. The output end of the drive device, the sample storage tube 4, and the shovel 5 are connected in sequence. The drive device mainly drives the sample storage tube 4 and the shovel 5 to rotate. During the collection operation, the wedge-shaped feed port 6 at the bottom of the shovel 5 inserts its tip into the surface of the bottom sediment. When the drive device is started, the shovel 5 and the sample storage tube 4 begin to rotate under the action of the drive device. Cutting edges are provided on the side of the feed port 6 and on both sides of the groove. During the rotation of the shovel 5, the cutting edges are used to cut the bottom sediment, that is, to cut out a mud column with the same diameter as the feed port 6 in the bottom sediment. In order to avoid the shovel 5 rotating too fast and causing the bottom sediment inside the shovel 5 to rotate, thereby affecting the structure of the bottom sediment, the power source 1 in the drive device adopts a high torque, low speed drive motor. In this embodiment, the power source 1 is a geared motor 18, which drives the shovel body 5 to rotate at low speed while providing high torque to the shovel body 5, so that the shovel body 5 and the sample collection tube 4 can rotate smoothly in the bottom mud. When the friction between the bottom mud and the outer wall of the shovel body 5 and the sample collection tube 4 is small, the manual rotating rod 16 can also be used to drive the shovel body 5 and the sample collection tube 4 to rotate and collect the bottom mud.

[0021] After starting the reduction motor 18, axial pressure is applied to the shovel body 5, causing it to rotate and penetrate deeper into the bottom sediment. As the insertion depth increases, the length of the mud column in the shovel body 5 and the sample collection tube 4 gradually increases. The mud column forces water and air out of the sample collection tube 4 through the drainage hole 9 on the side wall of the sample collection tube 4, preventing water and air in the sample collection tube 4 from obstructing the entry of the mud column. The mud column that enters the sample collection tube 4 is the collected bottom sediment sample. After reaching the predetermined insertion depth, the sample collection tube 4 and the shovel body 5 are lifted upwards. Because the inner side wall of the sample collection tube 4 is equipped with an anti-detachment structure, the mud column is prevented from detaching from the sample collection tube 4 during the lifting process, ensuring that the collected bottom sediment can be smoothly brought out of the water surface. This bottom sediment collection device combines the driving forces of rotation around the central axis and axial pressure, enabling it to smoothly insert into bottom sediments of different textures to complete the collection work, reducing the difficulty of bottom sediment collection and improving collection efficiency.

[0022] Preferably, the drainage holes 9 and the anti-detachment structure are evenly distributed on the inner wall of the sample storage tube 4 to improve the efficiency of air and water discharge in the sample storage tube 4 and to improve the anti-detachment effect of the anti-detachment structure.

[0023] During the lifting of the sample tube 4, due to the anti-detachment mechanism installed on the side wall of the sample tube 4, the mud column inside the shovel body 5 is easily detached under the scouring of the water flow, thus exposing the mud column in the sample tube 4. If the sample tube 4 cannot be quickly lifted out of the water, the mud column in the sample tube 4 will gradually detach under the erosion of the water flow. Therefore, to slow down the detachment speed of the mud column in the shovel body 5, a threaded guide groove 10 is provided on the inner side of the shovel body 5. The spiral direction of the guide groove 10 is the same as the rotation direction of the sample tube 4 driven by the power source 1 when collecting bottom mud. The guide groove 10 increases the contact area between the mud column in the shovel body 5 and the inner side wall of the shovel body 5, improves the stability of the mud column in the shovel body 5, ensures that the mud column in the shovel body 5 cannot detach before the sample tube 4 is lifted out of the water, and reduces the scouring of the mud column in the sample tube 4 by the water flow.

[0024] Preferably, the anti-detachment structure is a backstop tooth 8, which includes a tapered tooth post. The tip of the tooth post is inclined towards the direction of the driving device and is disposed on the inner side wall of the sample storage tube 4. The tooth post is inclined towards the center of the sample storage tube 4.

[0025] To further reduce the scouring of the mud column in the sample storage tube 4 by the water flow, a protective cover 7 is fitted on the outside of the sample storage tube 4 and the shovel body 5. The axial length of the protective cover 7 is equal to the total length of the sample storage tube 4 and the shovel body 5, and there is a gap between the inner wall of the protective cover 7 and the outer wall of the sample storage tube 4 and the shovel body 5, so that the protective cover 7 can slide relative to the sample storage tube 4 and the shovel body 5. During the process of the shovel body 5 being inserted into the bottom mud, the bottom of the protective cover 7, that is, the end near the feed port 6, is pressed against the surface of the bottom mud. The protective cover 7 will not rotate synchronously with the shovel body 5 and the sample storage tube 4, nor will it be inserted into the bottom mud. As the shovel body 5 is continuously inserted into the bottom mud, the shovel body 5 and the sample storage tube 4 gradually extend out of the protective cover 7 until the mud column fills the sample storage tube 4. When the sample tube 4 and the shovel body 5 are lifted out of the bottom mud and water surface, the sample tube 4 and the shovel body 5 retract into the protective cover 7. The protective cover 7 protects the mud column in the shovel body 5 and the sample tube 4 from the scouring of external water flow, thereby ensuring the integrity of the mud column in the sample tube 4.

[0026] Preferably, the protective cover 7 is a cylindrical structure with an inner diameter larger than the outer diameter of the sample storage tube 4 and the shovel body 5. One end is fitted with a sealing plate, and the other end is open. The protective cover 7 is fitted over the sample storage tube 4 and the shovel body 5 from the end of the sample storage tube 4 closest to the reduction motor 18, with the side containing the sealing plate facing the reduction motor 18. A guide hole is provided on the sealing plate, and the output shaft of the reduction motor 18 passes through the guide hole and connects to the end of the sample storage tube 4, allowing the protective cover 7 to slide on the output shaft of the reduction motor 18. That is, when the shovel body 5 and the sample storage tube 4 are inserted into the bottom mud, the output shaft of the reduction motor 18 can push the shovel body 5 and the sample storage tube 4 out of the protective cover 7. After the bottom mud collection is completed, the output shaft of the reduction motor 18 can drive the shovel body 5 and the sample storage tube 4 back into the protective cover 7.

[0027] When collecting sediment samples at different depths, the length of the output shaft of the geared motor 18 needs to be adjusted accordingly. Therefore, in this embodiment, the drive device also includes a connecting rod assembly 2, which is detachably mounted on the output shaft of the geared motor 18. The number of connecting rods in the connecting rod assembly 2 can be adjusted to adapt to different water depths and change the insertion depth of the shovel body 5 and the sample storage tube 4 into the sediment. The connecting rod assembly 2 includes a limiting rod 12 and an extension rod 11. Multiple extension rods 11 are provided, and the length of the output shaft of the geared motor 18 is changed mainly by adjusting the number of extension rods 11. One end of any extension rod 11 is provided with a detachable connection structure for connecting to the output end of the power source 1, while at least one limiting rod 12 is provided.

[0028] In this embodiment, only one limiting rod 12 is provided, and one end of the limiting rod 12 passes through the guide hole on the sealing plate and is connected to the end of the sample storage tube 4, so that the limiting rod 12 can slide freely in the guide hole. The other end of the limiting rod 12 is detachably connected to the end of the extension rod 11 provided on the output shaft of the reduction motor 18. The length of the limiting rod 12 is not less than the axial length of the protective cover 7. A limiting plate 13 is provided on the limiting rod 12, and the distance between the limiting plate 13 and the sample storage tube 4 is not less than the axial length of the protective cover 7. A limit switch 14 is provided on the outside of the sealing plate to the length of the sealing plate. The limit switch 14 is electrically connected to the reduction motor 18. The reduction motor 18 can be turned off by the limit switch 14. When the reduction motor 18 is started to collect bottom mud, when the length of the mud column is equal to the total length of the sample tube 4 and the shovel body 5, the sample tube 4 and the shovel body 5 have completely extended out of the protective cover 7. The limit switch 14 hits the limit plate 13 and turns off the reduction motor 18, which means that the mud column has filled the sample tube 4 and the bottom mud collection work is completed.

[0029] Preferably, the distance between the limiting plate 13 and the sample storage tube 4 is equal to the axial length of the protective cover 7. After the reduction motor 18 is turned off, the axial pressure on the sample storage tube 4 and the shovel body 5 is stopped, so that the top of the mud column just abuts the top of the sample storage tube 4, preventing the bottom mud from continuing to enter the shovel body 5 and damaging the mud layer structure of the mud column. Because a check tooth 8 is provided on the inner wall of the sample storage tube 4, a movable cover plate 15 is provided at the end of the sample storage tube 4 near the reduction motor 18 to facilitate the removal of the mud column in the sample storage tube 4. The movable cover plate 15 is connected to the sample storage tube 4 by a thread, and the end of the limiting rod 12 is connected to the movable cover plate 15. At the same time, in order to prevent the sample storage tube 4 from loosening or even separating from the movable cover plate 15 during the rotation of the sample storage tube 4, a snap-fit ​​structure is provided on the outer wall of the movable cover plate 15 and the sample storage tube 4 to strengthen the connection between the movable cover plate 15 and the sample storage tube 4.

[0030] Preferably, the buckle structure is a spring-loaded buckle.

[0031] When dealing with highly viscous bottom mud, it is difficult to manually apply axial pressure to the shovel body 5 and the sample storage tube 4, and it is also difficult to insert the shovel body 5 into the depth of the bottom mud smoothly. Therefore, a spiral blade is provided on the outer surface of the shovel body 5. When the shovel body 5 rotates, the spiral blade drives the shovel body 5 and the sample storage tube 4 to drill into the depth of the bottom mud by themselves. This avoids the spiral blade changing the bottom mud structure in the shovel body 5 and reduces the physical exertion of the user.

[0032] As mentioned above, detachable connections include, but are not limited to, surface connections, threaded connections, and other connection methods that can transmit torque.

[0033] refer to Figure 4 In this embodiment, the connection between the extension rod 11 and the power source 1 is a surface connection. When the power source 1 is a geared motor 18, since the output torque of the geared motor 18 is large, in order to avoid damage to the connection between the geared motor 18 and the extension rod 11 under high torque, a square ball joint 19 is provided on the output shaft of the geared motor 18 to ensure the structural strength of the output shaft of the geared motor 18. One end of the extension rod 11, which is detachably connected to the output shaft of the geared motor 18, is also provided with a square ball joint 19. The geared motor 18 and the extension rod 11 are detachably connected through a double concave square sleeve 17. Under high torque, only the double concave square sleeve 17 is prone to damage. In this case, only the double concave square sleeve 17 needs to be replaced, thereby reducing the operating cost of the mud extraction device. When the power source 1 is a geared motor 18, the geared motor 18 is provided with a housing, and a control panel 20 for controlling the geared motor 18 is provided on the housing. The control panel 20 controls the start / stop, speed, and rotation direction of the geared motor 18. When the power source 1 is in manual mode, the output torque of the manual rotating lever 16 is relatively small. Therefore, the output end of the manual rotating lever 16 can be set as a square sleeve. The end of the extension rod 11 used to connect with the manual rotating lever 16 is set as a square ball joint 19. The four-way ball joint 19 on the extension rod 11 can be detachably connected through the square sleeve, thereby simplifying the connection structure between the manual rotating lever 16 and the extension rod 11.

[0034] Any adaptive changes made according to actual needs are within the scope of protection of this invention.

[0035] It should be noted that, for those skilled in the art, it is obvious that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0036] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A lake bottom sediment collection device, comprising a drive device and a sediment collector body (3), wherein the output end of the drive device is connected to the sediment collector body (3) via a transmission connection, characterized in that, The main body (3) of the mud sampler includes a sample storage tube (4) and a tubular shovel (5). The side wall of the sample storage tube (4) is provided with a drainage hole (9) and an anti-fall-off structure. The shovel (5) is coaxially disposed at one end of the sample storage tube (4), and the other end of the sample storage tube (4) is connected to the output end of the drive device. The side of the shovel (5) is provided with a groove along its axial direction. The groove penetrates the side wall of the shovel (5) along the thickness direction. A wedge-shaped feed inlet (6) is provided at one end of the shovel (5) away from the sample storage tube (4). The end of the groove away from the sample storage tube (4) is connected to the feed inlet (6). The edge of the feed inlet (6) and the edge of the groove are provided with cutting edges.

2. The lake sediment collection device according to claim 1, characterized in that, The inner wall of the shovel body (5) is provided with a threaded guide groove (10).

3. The lake sediment collection device according to claim 1, characterized in that, It also includes a protective cover (7), which is fitted on the outside of the mud sampler body (3) and is slidably connected to the mud sampler body (3).

4. The lake sediment collection device according to claim 3, characterized in that, The protective cover (7) is open at one end near the feed inlet (6), and a sealing plate is provided at one end of the protective cover (7) near the drive device. A guide hole is provided on the sealing plate, and the output end of the drive device passes through the guide hole and is connected to the sample storage tube (4).

5. The lake sediment collection device according to claim 4, characterized in that, The driving device includes a power source (1) and a linkage assembly (2). The linkage assembly (2) includes a limiting rod (12) and an extension rod (11). One end of the limiting rod (12) is connected to the end of the sample storage tube (4), and the other end is connected to the power source (1) through the extension rod (11).

6. The lake sediment collection device according to claim 5, characterized in that, A limit plate (13) is provided at one end of the limit rod (12) near the extension rod (11), and a limit switch (14) is provided on the outside of the sealing plate. The limit switch (14) is electrically connected to the power source (1).

7. The lake sediment collection device according to claim 5, characterized in that, The power source (1) includes a geared motor (18), the output end of which is detachably connected to the extension rod (11).

8. The lake sediment collection device according to claim 5, characterized in that, The sample storage tube (4) is provided with a movable cover plate (15) at one end near the power source (1), and the end of the limiting rod (12) is connected to the movable cover plate (15).

9. The lake sediment collection device according to claim 1, characterized in that, Spiral blades are provided on the outer surface of the shovel body (5).

10. The lake sediment collection device according to claim 1, characterized in that, The anti-drop structure is a backstop tooth (8), which includes a tapered tooth post. The tip of the tooth post is inclined toward the direction of the driving device and is disposed on the inner wall of the sample storage tube (4).

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