A device and method for determining the environmental dredging depth of nitrogen and phosphorus contaminated sediment

Abstract

The application relates to the technical field of water environment treatment, in particular to a device and method for judging the environmental-protection dredging depth of nitrogen and phosphorus contaminated sediment, which comprises a mounting frame, a control panel is fixedly connected to the top surface of the mounting frame, a cylinder body is fixedly connected to the inner wall of the top surface of the mounting frame, a sediment sampling drill is fixedly connected to the lower end surface of the cylinder body, a collecting pipe is arranged on the lower surface of the sediment sampling drill, and heating filaments are arranged in the collecting pipe; a first partition frame is arranged in the inside of an adaptive groove, and a second partition frame is arranged on the back surface of the collecting pipe. The first partition frame is moved to the inside of the adaptive groove, the second partition frame completes the same operation, and the first sealing gasket and the second sealing gasket are in mutual friction, so that the upper and middle layers of sediment can be segmented and isolated, thereby solving the problem that the water and sediment in the upper and middle layers of sediment can be shaken, and ensuring the accuracy during detection.

Description

Technical Field

[0001] This invention relates to the field of water environment management technology, specifically to a device and method for determining the depth of environmentally friendly dredging of nitrogen and phosphorus polluted sediment. Background Technology

[0002] Riverbed sediment is a major accumulation site for pollutants, especially nutrients, entering rivers. Nutrients from various sources undergo a series of physical, chemical, and biochemical processes, settling on the riverbed to form loose, grayish-black sediment rich in organic matter and nutrients. As a primary reservoir of pollutants, sediment can release various pollutants into the overlying water body under certain conditions, making it a significant endogenous source of pollution affecting water quality. The degree of sediment pollution and its impact on the aquatic environment are important indicators when selecting areas for environmentally friendly dredging. However, current research on how to accurately screen the scope and depth of environmentally friendly dredging through polluted sediment release tests is still limited, and a unified standard has not yet been established.

[0003] In response, Chinese patent application number CN114295411B discloses an underwater device for collecting sewage and sludge. The device includes a sampling cylinder, which is divided into several closed water collection sections from top to bottom by a baffle. Each water collection section is provided with a sampling hole and an air outlet. The air outlet is connected to a high-pressure air pump through a gas pipe. The sampling hole is provided with a first solenoid valve to control its opening and closing. A gravity device is fixedly connected to the lower end of the sampling cylinder, and a fixing plate is fixedly connected to the lower part of the gravity device. This invention can collect sewage or sludge at different depths in sections.

[0004] However, while the aforementioned patent allows for segmented sampling, the mud sampling tube and hose still need to be disassembled separately after sampling before the sample can be stored. Therefore, this operation cannot isolate the entire sample in segments after sampling. In addition, the bottom mud and water in the sample will move up and down, which cannot ensure the accuracy of subsequent testing and thus cannot ensure the authenticity of the sample. Therefore, improving and perfecting the above-mentioned problems is an urgent issue to be addressed. Summary of the Invention

[0005] The purpose of this invention is to provide an equipment and method for determining the depth of environmental dredging of nitrogen and phosphorus polluted sediment, in order to solve the problem mentioned in the background art that after sampling, it is necessary to disassemble the sludge sampling pipe and the hose separately before storing the sample. Therefore, the above operation cannot isolate the sample in sections after sampling. At the same time, the sediment and water in the sample will move up and down, which cannot ensure the accuracy of subsequent testing, and thus cannot ensure the authenticity of the sample at the time of sampling.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a device for determining the depth of environmentally friendly dredging of nitrogen and phosphorus polluted sediment, comprising a mounting frame, a control panel fixedly connected to the top surface of the mounting frame, a cylinder body fixedly connected to the inner wall of the top surface of the mounting frame, a sediment sampling drill fixedly connected to the lower end surface of the cylinder body, a collection tube provided on the lower surface of the sediment sampling drill, a heating wire provided inside the collection tube, and adaptation grooves provided on both the front and rear surfaces of the collection tube;

[0007] A first separator is installed inside the adapter slot. A second separator is provided on the back of the collection tube. The second separator has the same structure as the first separator. A first sealing gasket is fixedly connected to the back of the first separator. A second sealing gasket is fixedly connected to the front surface of the second separator. A sealing plate is fixedly connected to the outer surface of the first separator. A first connecting plate is fixedly connected to the outer surface of the sealing plate. A first rack plate is fixedly connected to the outer surface of the first connecting plate. A first gear is meshed with the top surface of the first rack plate. A first rotating rod is fixedly connected to the left side surface of the first gear. A second gear is fixedly connected to the end of the first rotating rod away from the first gear. A first limiting rod is provided on the left side surface of the second gear. A second rack plate is meshed with the outer surface of the second gear.

[0008] Preferably, a stabilizing cover is provided on the outer surface of the first limiting rod, and an electric push rod is fixedly connected to the top surface of the inner wall of the stabilizing cover. The lower surface of the electric push rod is fixedly connected to the top surface of the second rack plate.

[0009] Preferably, a second limiting plate is inserted and installed on the inner side wall of the stabilizing cover, and a third gear is fixedly connected to the right side surface of the second limiting plate.

[0010] Preferably, a second rotating rod is fixedly connected to the right side surface of the third gear, and a fourth gear is fixedly connected to the end of the second rotating rod away from the third gear.

[0011] Preferably, the lower surface of the fourth gear is meshed with a third rack plate, and the back of the third rack plate is fixedly connected with a second connecting plate.

[0012] Preferably, a rotating shaft is inserted and installed on the inner side wall of the first partition, a first bevel gear is fixedly connected to the outer surface of the rotating shaft, a second bevel gear is meshed with the outer surface of the first bevel gear, and a rotating blade is fixedly connected to the back of the second bevel gear.

[0013] Preferably, the inner wall of the first separator is provided with a mesh screen, which is in contact with the rotating blade and communicates with the first sealing gasket.

[0014] Preferably, a belt body is provided on one side of the surface of the rotating shaft, a limit shaft is provided on the inner side wall of the belt body, and a motor body is fixedly connected to the left side surface of the limit shaft.

[0015] Preferably, a side frame is fixedly connected to the front surface of the acquisition tube, a side block is fixedly connected to the lower surface of the side frame, a first telescopic rod is fixedly connected to the back of the side block, a sealing door is provided at the end of the first telescopic rod away from the side block, an installation block is fixedly connected to the right side surface of the side frame, a second telescopic rod is fixedly connected to the lower surface of the installation block, and a pressure sensor body is fixedly connected to the lower surface of the second telescopic rod.

[0016] A preferred method for determining the depth of environmentally friendly dredging of nitrogen and phosphorus contaminated sediment:

[0017] S1. The cylinder body drives the sediment sampling drill to move downwards as a whole. At this time, the second telescopic rod will also move downwards. When the pressure sensor body senses strong pressure, it starts the first telescopic rod, which drives the sealing door to move forward. The sealing door leaves from the bottom of the collection tube, and the sediment sampling drill and collection tube are started to sample the bottom sediment.

[0018] S2. The collection tube begins feeding. After feeding is completed, the first telescopic rod moves the sealing door to seal the lower end of the collection tube. The electric push rod is activated, which moves the second rack plate downward. The second rack plate meshes with the second gear, which rotates counterclockwise, causing the first rotating rod and the first gear to rotate counterclockwise. The first gear meshes with the first rack plate, which moves to the back side. The first rack plate moves the first connecting plate and the first partition to the back side. The first partition moves into the adaptation groove. The second partition completes the same operation. The first sealing gasket and the second sealing gasket abut against each other.

[0019] S3. After the first and second sealing gaskets come into contact with each other, the second rack plate does not mesh with the second gear. The second rack plate continues to move downwards and meshes with the third gear, driving the third rack plate to move to the back side, further separating the bottom mud inside the collection tube. Before the first and second sealing gaskets come into contact with each other, the motor body drives the limit shaft to rotate, the limit shaft drives the belt body to rotate, the belt body drives the rotating shaft and the first bevel gear to rotate, the first bevel gear meshes with the second bevel gear, and the second bevel gear drives the rotating blade to rotate.

[0020] S4. After the third rack plate drives the second group of first and second partition frames to engage, the second rack plate stops moving. Then, during the unloading process, the first telescopic rod drives the sealing door forward, and the first group of bottom sediment is unloaded. Subsequently, the electric push rod drives the second rack plate upward. The second rack plate first meshes with the third gear, and the third rack plate drives the second group of first and second partition frames to disengage, allowing the second group of bottom sediment to be unloaded. The second rack plate meshes with the second gear, and the first and second partition frames begin to disengage, allowing the third group of bottom sediment to be unloaded. The bottom sediment is then classified and collected. Subsequently, pollutant release tests between bottom sediment and water of a certain thickness under simulated natural conditions in the laboratory are conducted to obtain the release amount per unit area of ​​each layer of bottom sediment. Based on the ratio of the three groups of bottom sediment samples obtained from the small-scale test and this sampling, the actual total amount of bottom sediment pollutants released is calculated. By comparing and analyzing the total amount of bottom sediment pollutant release with the water body's pollution carrying capacity, a method for determining the depth of environmentally friendly bottom sediment dredging can be obtained.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] 1. The equipment and method for determining the depth of environmental dredging of nitrogen and phosphorus polluted sediment comprises an installation frame, control panel, cylinder body, sediment sampling drill, collection tube, heating wire, first partition frame, second partition frame, first sealing gasket, sealing plate, first connecting plate, and first rack plate. In use, the installation frame is mounted onto the hull. The control panel drives the cylinder body downwards, which in turn drives the sediment sampling drill downwards. Simultaneously, the second telescopic rod also moves downwards. When the pressure sensor body senses strong pressure, the first telescopic rod is activated, moving the sealing door forward. The sealing door then moves away from the lower end of the collection tube. The sediment sampling drill and collection tube are activated to sample the sediment. The sediment begins to enter the collection tube, and feeding begins. After feeding is complete, the first telescopic rod moves the sealing door to seal the lower end of the collection tube. An electric push rod is then activated, driving the second rack plate downwards. The second rack plate meshes with the second gear. When the first gear rotates counterclockwise, it drives the first rotating rod and the first gear to rotate counterclockwise. The first gear meshes with the first rack plate, which moves to the back side. The first rack plate drives the first connecting plate and the first separator to move to the back side. The first separator moves into the adaptation groove. The second separator performs the same operation. The first sealing gasket and the second sealing gasket abut against each other, thus isolating the upper and middle layers of bottom mud in segments. This solves the problem of water and mud movement in the upper and middle layers of bottom mud, ensuring the accuracy of the test. At the same time, after the first and second sealing gaskets abut against each other, the second rack plate does not mesh with the second gear. The second rack plate continues to move downward and meshes with the third gear, driving the third rack plate to move to the back side, further isolating the lower and middle layers of bottom mud inside the collection tube in segments. This strengthens the ability to immediately isolate the bottom mud in segments after sampling, ensuring the authenticity of the sample during sampling. The overall sampling effect is good, reflecting the functionality of the design.

[0023] 2. The equipment and method for determining the depth of nitrogen and phosphorus contaminated sediment through environmental dredging, via a rotating shaft, a first bevel gear, a second bevel gear, rotating blades, a strainer, a belt body, a limiting shaft, and a motor body, operates as follows: before the first and second sealing gaskets come into contact, the motor body drives the limiting shaft to rotate, which in turn drives the belt body to rotate. The belt body then drives the rotating shaft and the first bevel gear to rotate, and the first and second bevel gears mesh. The second bevel gear drives the rotating blades to rotate, causing the blades to rotate on the surface of the strainer. Simultaneously, the rotating blades create airflow towards the back of the first sealing gasket. Before the first and second sealing gaskets come into contact, the sediment in the gap between them is blown away, enhancing the overall sealing effect and preventing samples from the upper and middle layers of sediment from falling out, thus improving the accuracy of the seal. The process continues until the third rack plate drives the second set of first and second separators to come into contact. Afterwards, the second rack plate stops moving. Then, during the unloading process, the first telescopic rod drives the sealing door forward, and the first group of bottom sediment is unloaded. Subsequently, the electric push rod drives the second rack plate upward. The second rack plate first meshes with the third gear, and the third rack plate drives the first and second partition frames of the second group to disengage. The second group of bottom sediment is unloaded, the second rack plate meshes with the second gear, and the first and second partition frames begin to disengage. The third group of bottom sediment is unloaded, and the bottom sediment is classified and collected. Subsequently, pollutant release tests between bottom sediment of a certain thickness and water under simulated natural conditions in the laboratory are conducted to obtain the release amount per unit area of ​​each layer of bottom sediment. Based on the ratio of the three groups of bottom sediment samples obtained from the small-scale test and this sampling, the actual total amount of bottom sediment pollutants released is calculated. Based on the comparative analysis of the total amount of bottom sediment pollutant release and the water body's pollution carrying capacity, a method for determining the depth of environmentally friendly bottom sediment dredging can be obtained. Attached Figure Description

[0024] Figure 1 This is a three-dimensional schematic diagram of the structure of the present invention;

[0025] Figure 2 This is a schematic diagram showing the disassembled structure of the sediment sampling drill and collection pipe of the present invention;

[0026] Figure 3 This is a three-dimensional schematic diagram of the acquisition tube and the first partition frame structure of the present invention;

[0027] Figure 4 This is a three-dimensional schematic diagram of the first and second partition frames of the present invention;

[0028] Figure 5 This is a split schematic diagram of the second gear and the first separator frame structure of the present invention;

[0029] Figure 6 This is a cross-sectional schematic diagram of the stabilizer structure of the present invention;

[0030] Figure 7 This is a schematic cross-sectional view of the first partition frame structure of the present invention;

[0031] Figure 8 This is a schematic diagram showing the disassembled side frame and sealing door structure of the present invention.

[0032] In the diagram: 1. Mounting frame; 2. Control panel; 3. Cylinder body; 4. Sediment sampling drill; 5. Collection tube; 6. Heating wire; 7. First partition frame; 8. Second partition frame; 9. First sealing gasket; 10. Sealing plate; 11. First connecting plate; 12. First rack plate; 13. First gear; 14. First rotating rod; 15. Second gear; 16. First limit rod; 17. Stabilizing cover; 18. Electric push rod; 19. Second rack plate; 20. 21. Second limiting plate; 22. Third gear; 23. Second rotating rod; 24. Fourth gear; 25. Third rack plate; 26. Rotating shaft; 27. First bevel gear; 28. Second bevel gear; 29. ​​Rotating blade; 30. Strainer; 31. Belt body; 32. Limiting shaft; 33. Motor body; 34. Side frame; 35. Side block; 36. First telescopic rod; 37. Sealing door; 38. Mounting block; 39. Second telescopic rod; 30. Pressure sensor body. Detailed Implementation

[0033] 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.

[0034] Please see Figure 1-8 One embodiment provided by the present invention:

[0035] A device for determining the depth of environmentally friendly dredging of nitrogen and phosphorus contaminated sediment is disclosed in this application. The control panel 2, cylinder body 3, sediment sampling drill 4, heating wire 6, electric push rod 18, motor body 32, second telescopic rod 38, and pressure sensor body 39 used in this application are all commercially available products. Their principles and connection methods are existing technologies well-known to those skilled in the art, and therefore will not be elaborated upon here. The output end of the control panel 2 is electrically connected to the input ends of the cylinder body 3, sediment sampling drill 4, heating wire 6, electric push rod 18, motor body 32, second telescopic rod 38, and pressure sensor body 39 via wires. The device includes a mounting frame 1, with the control panel 2 fixedly connected to the top surface of the mounting frame 1, and the cylinder body 39 fixedly connected to the inner wall of the top surface of the mounting frame 1. The lower surface of the cylinder body 3 is fixedly connected to a sediment sampling drill 4, model SDIVCD. A collection tube 5 is installed on the lower surface of the sediment sampling drill 4, and a heating wire 6 is installed inside the collection tube 5. The heating wire 6 heats the sediment inside the collection tube 5, ensuring that the sediment maintains its temperature after sampling. Adaptor grooves are provided on both the front and rear surfaces of the collection tube 5, with two sets of adaptation grooves on each surface. The mounting bracket 1 is installed onto the hull, and then the control panel 2 drives the cylinder body 3 to move downwards. The cylinder body 3 drives the sediment sampling drill 4 to move downwards as a whole. At this time, the second telescopic rod 38 also moves downwards. When the pressure sensor body 39 senses strong pressure, it activates... The first telescopic rod 35 is activated, causing the sealing door 36 to move forward and exit from the lower end of the collection tube 5. The sediment sampling drill 4 and collection tube 5 are then started to sample the bottom sediment. The bottom sediment begins to enter from the inside of the collection tube 5, and the collection tube 5 begins to feed. After the feeding inside the collection tube 5 is completed, the first telescopic rod 35 moves the sealing door 36 to seal the lower end of the collection tube 5. The electric push rod 18 is activated, causing the second rack plate 19 to move downwards. The second rack plate 19 meshes with the second gear 15, which rotates counterclockwise, causing the first rotating rod 14 and the first gear 13 to rotate counterclockwise. The first gear 13 meshes with the first rack plate 12, which moves to the back side, causing the first rack plate 12 to rotate counterclockwise. The connecting plate 11 and the first separator 7 move to the back side, and the first separator 7 moves into the interior of the adapter groove. The second separator 8 performs the same operation. The first sealing gasket 9 and the second sealing gasket abut against each other, thereby isolating the upper and middle layers of bottom mud in segments. This solves the problem of moisture and mud movement in the upper and middle layers of bottom mud, ensuring the accuracy of the test. At the same time, after the first sealing gasket 9 and the second sealing gasket abut against each other, the second rack plate 19 does not mesh with the second gear 15. The second rack plate 19 continues to move downward and meshes with the third gear 21, driving the third rack plate 24 to move to the back side, further isolating the lower and middle layers of bottom mud inside the collection tube 5 in segments. This strengthens the ability to immediately isolate the bottom mud in segments after sampling.This ensures the fidelity of the samples during sampling, resulting in good overall sampling performance.

[0036] A first separator 7 is installed inside the adapter slot. A second separator 8 is provided on the back of the collection tube 5. The second separator 8 has the same structure as the first separator 7. Both the first separator 7 and the second separator 8 are installed inside the adapter slot, and two sets of each are provided. A first sealing gasket 9 is fixedly connected to the back of the first separator 7, and a second sealing gasket is fixedly connected to the front surface of the second separator 8. A sealing plate 10 is fixedly connected to the outer surface of the first separator 7, and a first connecting plate 11 is fixedly connected to the outer surface of the sealing plate 10. A first rack plate 12 is fixedly connected to the outer surface of the first connecting plate 11, and a first gear 13 is meshed with the top surface of the first rack plate 12. The left side surface of the first gear 13 is fixedly connected to the first gear 13. A first rotating rod 14 is fixedly connected to the first rotating rod 14. A second gear 15 is fixedly connected to the end of the first rotating rod 14 away from the first gear 13. A first limiting rod 16 is provided on the left side surface of the second gear 15. A second rack plate 19 is meshed with the outer surface of the second gear 15. A stabilizing cover 17 is provided on the outer surface of the first limiting rod 16. The stabilizing cover 17 is connected to the collection tube 5 through a connecting block. Two sets of stabilizing covers 17 are installed, one on the front and one on the rear surface of the collection tube 5, respectively. An electric push rod 18 is fixedly connected to the top surface of the inner wall of the stabilizing cover 17. The lower surface of the electric push rod 18 is fixedly connected to the top surface of the second rack plate 19. A second limiting plate 20 is inserted into the inner side wall of the stabilizing cover 17. A third gear 21 is fixedly connected to the right side surface of the second limiting plate 20. A second rotating rod 22 is fixedly connected to the right side surface of the third gear 21. A fourth gear 23 is fixedly connected to the end of the second rotating rod 22 away from the third gear 21. A third rack plate 24 is meshed with the lower surface of the fourth gear 23. A second connecting plate is fixedly connected to the back of the third rack plate 24. A rotating shaft 25 is inserted and installed on the inner wall of the first partition frame 7. A first bevel gear 26 is fixedly connected to the outer surface of the rotating shaft 25. A second bevel gear 27 is meshed with the outer surface of the first bevel gear 26. A rotating blade 28 is fixedly connected to the back of the second bevel gear 27. A mesh 29 is provided on the inner wall of the first partition frame 7. The mesh 29 and the rotating blade 28 are in contact with each other. The mesh 29 is connected to the first sealing gasket 9. A mesh 29 is provided on one side of the surface of the rotating shaft 25. The system includes a belt body 30, with a limit shaft 31 on its inner wall. A motor body 32 is fixedly connected to the left side surface of the limit shaft 31. A side frame 33 is fixedly connected to the front surface of the acquisition tube 5, and a side block 34 is fixedly connected to the lower surface of the side frame 33. A first telescopic rod 35 is fixedly connected to the back of the side block 34, and a sealing door 36 is provided at the end of the first telescopic rod 35 away from the side block 34. A mounting block 37 is fixedly connected to the right side surface of the side frame 33, and a second telescopic rod 38 is fixedly connected to the lower surface of the mounting block 37. A pressure sensor body 39 is fixedly connected to the lower surface of the second telescopic rod 38. Before the first sealing gasket 9 and the second sealing gasket come into contact with each other, the motor body 32 drives the limit shaft 31 to rotate, and the limit shaft 31 drives the belt body 30 to rotate.The belt body 30 drives the rotating shaft 25 and the first bevel gear 26 to rotate. The first bevel gear 26 meshes with the second bevel gear 27, and the second bevel gear 27 drives the rotating blade 28 to rotate. Thus, the rotating blade 28 rotates on the surface of the screen 29. At the same time, when the rotating blade 28 rotates, it blows air towards the back of the first sealing gasket 9. Before the first sealing gasket 9 and the second sealing gasket come into contact, it can blow away the bottom mud in the gap between the first sealing gasket 9 and the second sealing gasket, thereby strengthening the overall sealing effect and preventing the bottom mud sample from falling off, thus enhancing the fidelity effect. After the third rack plate 24 drives the second set of first separator 7 and second separator 8 to come into contact, the second rack plate 19 stops moving. Then, when feeding, the first telescopic rod 35 drives the sealing door 36 to move forward, and the first set of bottom mud is fed out. Then the electric push rod 1... 8 drives the second rack plate 19 upward, and the second rack plate 19 first meshes with the third gear 21. The third rack plate 24 drives the second set of first separator 7 and second separator 8 to disengage, and the second set of bottom sediment is discharged. The second rack plate 19 meshes with the second gear 15, and the first separator 7 and second separator 8 begin to disengage, and the third set of bottom sediment is discharged, completing the classification and collection of bottom sediment. Subsequently, through laboratory simulation of pollutant release tests between bottom sediment of a certain thickness and water under natural conditions, the release amount per unit area of ​​each bottom sediment layer is obtained. Based on the proportional relationship between the small-scale test and the three sets of bottom sediment samples obtained in this sampling, the actual total amount of bottom sediment pollutants released is calculated. Based on the comparative analysis of the total amount of bottom sediment pollutant release and the water body's pollution carrying capacity, a method for determining the depth of environmentally friendly bottom sediment dredging can be obtained.

[0037] A method for determining the depth of environmentally friendly dredging of nitrogen and phosphorus contaminated sediment:

[0038] S1. The cylinder body 3 drives the sediment sampling drill 4 to move downward as a whole. At this time, the second telescopic rod 38 will also move downward. When the pressure sensor body 39 senses strong pressure, the first telescopic rod 35 is activated, which drives the sealing door 36 to move forward. The sealing door 36 leaves from the lower end of the collection tube 5, and the sediment sampling drill 4 and the collection tube 5 are activated to sample the bottom sediment.

[0039] S2. The collection tube 5 begins to feed. After feeding is completed, the first telescopic rod 35 moves the sealing door 36 to seal the lower end of the collection tube 5. The electric push rod 18 is activated, which drives the second rack plate 19 downward. The second rack plate 19 meshes with the second gear 15. The second gear 15 rotates counterclockwise, driving the first rotating rod 14 and the first gear 13 to rotate counterclockwise. The first gear 13 meshes with the first rack plate 12. The first rack plate 12 moves to the back side, driving the first connecting plate 11 and the first partition frame 7 to move to the back side. The first partition frame 7 moves into the interior of the adapter groove. The second partition frame 8 completes the same operation. The first sealing gasket 9 and the second sealing gasket abut against each other.

[0040] S3. After the first sealing gasket 9 and the second sealing gasket come into contact with each other, the second rack plate 19 does not mesh with the second gear 15. The second rack plate 19 continues to move downward and meshes with the third gear 21, driving the third rack plate 24 to move to the back side, further separating the bottom mud inside the collection tube 5. Before the first sealing gasket 9 and the second sealing gasket come into contact with each other, the motor body 32 drives the limiting shaft 31 to rotate. The limiting shaft 31 drives the belt body 30 to rotate. The belt body 30 drives the rotating shaft 25 and the first bevel gear 26 to rotate. The first bevel gear 26 meshes with the second bevel gear 27. The second bevel gear 27 drives the rotating blade 28 to rotate.

[0041] S4. After the third rack plate 24 drives the second set of first partition frames 7 and second partition frames 8 to engage, the second rack plate 19 stops moving. Then, during material feeding, the first telescopic rod 35 drives the sealing door 36 forward, and the first set of bottom mud is fed. Subsequently, the electric push rod 18 drives the second rack plate 19 upward. The second rack plate 19 first meshes with the third gear 21. The third rack plate 24 drives the second set of first partition frames 7 and second partition frames 8 to disengage, and the second set of bottom mud is fed. The second rack plate 19 meshes with the second gear 15, and the first partition frame... 7. The second separator 8 begins to release its contact state, and the third group of bottom sediment is fed in, completing the classification and collection of the bottom sediment. Subsequently, through laboratory simulation of natural conditions, a pollutant release test is conducted between bottom sediment of a certain thickness and water to obtain the release amount per unit area of ​​each layer of bottom sediment. Based on the ratio of the three groups of bottom sediment samples obtained from the small-scale test and this sampling, the actual total amount of bottom sediment pollutants released is calculated. Based on the comparative analysis of the total amount of bottom sediment pollutant release and the water body's pollution carrying capacity, a method for determining the depth of environmentally friendly bottom sediment dredging can be obtained.

[0042] Working Principle: When using this device, the operator first connects it to an external power source to provide power. During use, the mounting bracket 1 is installed onto the hull. Then, the control panel 2 drives the cylinder body 3 downwards, which in turn drives the sediment sampling drill 4 downwards. At this time, the second telescopic rod 38 also moves downwards. When the pressure sensor body 39 senses strong pressure, the first telescopic rod 35 is activated, causing the sealing door 36 to move forward and exit from the lower end of the collection tube 5. The sediment sampling drill 4 and collection tube 5 are then activated to sample the bottom sediment. The sediment begins to enter from inside the collection tube 5, and the tube begins to feed. After the feeding is complete, the first telescopic rod 35 moves the sealing door 36 to seal the lower end of the collection tube 5. The electric push rod 18 is then activated, driving the second rack plate 1... 9. Downward, the second rack plate 19 meshes with the second gear 15, the second gear 15 rotates counterclockwise, driving the first rotating rod 14 and the first gear 13 to rotate counterclockwise, the first gear 13 meshes with the first rack plate 12, the first rack plate 12 moves to the back side, the first rack plate 12 drives the first connecting plate 11 and the first partition frame 7 to move to the back side, the first partition frame 7 moves into the interior of the adapter groove, the second partition frame 8 completes the same operation, the first sealing gasket 9 and the second sealing gasket abut against each other, thereby enabling the upper and middle layers of bottom mud to be separated in segments. At the same time, after the first sealing gasket 9 and the second sealing gasket abut against each other, the second rack plate 19 does not mesh with the second gear 15, the second rack plate 19 continues downward, the second rack plate 19 meshes with the third gear 21, driving the third rack plate 24 to move to the back side, continuing to separate the middle and lower layers of bottom mud inside the collection tube 5 in segments;

[0043] Before the first sealing gasket 9 and the second sealing gasket come into contact, the motor body 32 drives the limiting shaft 31 to rotate, the limiting shaft 31 drives the belt body 30 to rotate, the belt body 30 drives the rotating shaft 25 and the first bevel gear 26 to rotate, the first bevel gear 26 meshes with the second bevel gear 27, the second bevel gear 27 drives the rotating blade 28 to rotate, so the rotating blade 28 will rotate on the surface of the screen 29. At the same time, when the rotating blade 28 rotates, there will be wind blowing towards the back of the first sealing gasket 9. Before the first sealing gasket 9 and the second sealing gasket come into contact, the bottom mud in the gap between the first sealing gasket 9 and the second sealing gasket can be blown away, and the problem of the bottom mud sample in the upper and middle layers can also be avoided. After the third rack plate 24 drives the second set of first separator 7 and second separator 8 to come into contact, the second rack plate 19 stops moving. Then, when feeding, the first telescopic rod 35 drives the sealing door 36 to move forward, and the first set of bottom The mud is discharged, and then the electric push rod 18 drives the second rack plate 19 upward. The second rack plate 19 first meshes with the third gear 21, and the third rack plate 24 drives the second set of first separator 7 and second separator 8 to disengage. The second set of bottom mud is discharged, the second rack plate 19 meshes with the second gear 15, and the first separator 7 and second separator 8 begin to disengage. The third set of bottom mud is discharged, and the bottom mud is classified and collected. Subsequently, pollutant release tests between bottom mud of a certain thickness and water under simulated natural conditions in the laboratory are conducted to obtain the release amount per unit area of ​​each layer of bottom mud. Based on the ratio of the three sets of bottom mud samples in the area to be dredged obtained from the small-scale test and this sampling, the actual total amount of bottom mud pollutants released is calculated. Based on the comparative analysis of the total amount of bottom mud pollutant release and the water body's pollution carrying capacity, a method for determining the depth of environmentally friendly bottom mud dredging can be obtained. The above is the working principle of this invention.

[0044] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Those skilled in the art can readily implement the present invention based on the accompanying drawings and the above description. However, any modifications, alterations, or variations made by those skilled in the art without departing from the scope of the present invention, utilizing the disclosed technical content, are equivalent embodiments of the present invention. Furthermore, any modifications, alterations, or variations made to the above embodiments based on the essential technology of the present invention are still within the protection scope of the present invention.

Claims

1. A device for determining the depth of environmentally friendly dredging of nitrogen and phosphorus polluted sediment, comprising a mounting frame (1), a control panel (2) fixedly connected to the top surface of the mounting frame (1), a cylinder body (3) fixedly connected to the inner wall of the top surface of the mounting frame (1), and a sediment sampling drill (4) fixedly connected to the lower end surface of the cylinder body (3), characterized in that: The sediment sampling drill (4) is provided with a collection tube (5) on its lower surface. A heating wire (6) is provided inside the collection tube (5). Adaptor grooves are provided on both the front and rear surfaces of the collection tube (5). The first partition frame (7) is installed inside the adapter slot. The back of the collection tube (5) is provided with a second partition frame (8). The second partition frame (8) has the same structure as the first partition frame (7). The back of the first partition frame (7) is fixedly connected with a first sealing gasket (9). The front surface of the second partition frame (8) is fixedly connected with a second sealing gasket. The outer surface of the first partition frame (7) is fixedly connected with a sealing plate (10). The outer surface of the sealing plate (10) is fixedly connected with a first connecting plate (11). The outer surface of the first connecting plate (11) is fixedly connected with a first rack plate (12). The top surface of the first rack plate (12) is meshed with a first gear (13). The left side surface of the first gear (13) is fixedly connected with a first rotating rod (14). The end of the first rotating rod (14) away from the first gear (13) is fixedly connected with a second gear (15). The left side surface of the second gear (15) is provided with a first limiting rod (16). The outer surface of the second gear (15) is meshed with a second rack plate (19). A rotating shaft (25) is inserted into the inner wall of the first partition frame (7). A first bevel gear (26) is fixedly connected to the outer surface of the rotating shaft (25). A second bevel gear (27) is meshed with the outer surface of the first bevel gear (26). A rotating blade (28) is fixedly connected to the back of the second bevel gear (27). A mesh (29) is provided on the inner wall of the first partition frame (7). The mesh (29) and the rotating blade (28) are in contact with each other. The mesh (29) is connected to the first sealing gasket (9). A belt body (30) is provided on one side of the surface of the rotating shaft (25). A limit shaft (31) is provided on the inner wall of the belt body (30). The left side surface of the limiting shaft (31) is fixedly connected to the motor body (32). Before the first sealing gasket (9) and the second sealing gasket come into contact with each other, the motor body (32) drives the limiting shaft (31) to rotate. The limiting shaft (31) drives the belt body (30) to rotate. The belt body (30) drives the rotating shaft (25) and the first bevel gear (26) to rotate. The first bevel gear (26) meshes with the second bevel gear (27). The second bevel gear (27) drives the rotating blade (28) to rotate. The rotating blade (28) will rotate on the surface of the mesh (29). When the rotating blade (28) rotates, there will be wind blowing towards the back of the first sealing gasket (9).

2. The device for determining the depth of environmental dredging of nitrogen and phosphorus polluted sediment according to claim 1, characterized in that: The outer surface of the first limiting rod (16) is provided with a stabilizing cover (17), and the top surface of the inner wall of the stabilizing cover (17) is fixedly connected with an electric push rod (18). The lower surface of the electric push rod (18) is fixedly connected with the top surface of the second rack plate (19).

3. The device for determining the depth of environmental dredging of nitrogen and phosphorus polluted sediment according to claim 2, characterized in that: A second limiting plate (20) is inserted and installed on the inner side wall of the stabilizing cover (17), and a third gear (21) is fixedly connected to the right side surface of the second limiting plate (20).

4. The device for determining the depth of environmental dredging of nitrogen and phosphorus polluted sediment according to claim 3, characterized in that: A second rotating rod (22) is fixedly connected to the right side surface of the third gear (21), and a fourth gear (23) is fixedly connected to the end of the second rotating rod (22) away from the third gear (21).

5. The device for determining the depth of environmental dredging of nitrogen and phosphorus polluted sediment according to claim 4, characterized in that: The lower surface of the fourth gear (23) is meshed with a third rack plate (24), and the back of the third rack plate (24) is fixedly connected with a second connecting plate.

6. The device for determining the depth of environmental dredging of nitrogen and phosphorus polluted sediment according to claim 1, characterized in that: A side frame (33) is fixedly connected to the front surface of the acquisition tube (5). A side block (34) is fixedly connected to the lower surface of the side frame (33). A first telescopic rod (35) is fixedly connected to the back of the side block (34). A sealing door (36) is provided at the end of the first telescopic rod (35) away from the side block (34). A mounting block (37) is fixedly connected to the right side surface of the side frame (33). A second telescopic rod (38) is fixedly connected to the lower surface of the mounting block (37). A pressure sensor body (39) is fixedly connected to the lower surface of the second telescopic rod (38).

7. A method for determining the depth of nitrogen and phosphorus contaminated sediment using the equipment described in any one of claims 1-6, characterized in that: S1. The cylinder body (3) drives the sediment sampling drill (4) to move downward as a whole. At this time, the second telescopic rod (38) will also move downward. When the pressure sensor body (39) senses strong pressure, the first telescopic rod (35) is activated, which drives the sealing door (36) to move forward. The sealing door (36) leaves from the lower end of the collection tube (5). The sediment sampling drill (4) and the collection tube (5) are activated to sample the bottom sediment. S2. The collection tube (5) starts feeding. After feeding is completed, the first telescopic rod (35) drives the sealing door (36) to move and seal the lower end of the collection tube (5). The electric push rod (18) is started. The electric push rod (18) drives the second rack plate (19) downward. The second rack plate (19) meshes with the second gear (15). The second gear (15) rotates counterclockwise, driving the first rotating rod (14) and the first gear (13) to rotate counterclockwise. The first gear (13) meshes with the first rack plate (12). The first rack plate (12) moves to the back side. The first rack plate (12) drives the first connecting plate (11) and the first partition frame (7) to move to the back side. The first partition frame (7) moves into the interior of the adapter groove. The second partition frame (8) completes the same operation. The first sealing gasket (9) and the second sealing gasket abut against each other. S3. After the first sealing gasket (9) and the second sealing gasket come into contact with each other, the second rack plate (19) does not mesh with the second gear (15). The second rack plate (19) continues to move downward. The second rack plate (19) meshes with the third gear (21) and drives the third rack plate (24) to move to the back side, further separating the bottom mud inside the collection tube (5). Before the first sealing gasket (9) and the second sealing gasket come into contact with each other, the motor body (32) drives the limit shaft (31) to rotate. The limit shaft (31) drives the belt body (30) to rotate. The belt body (30) drives the rotating shaft (25) and the first bevel gear (26) to rotate. The first bevel gear (26) meshes with the second bevel gear (27). The second bevel gear (27) drives the rotating blade (28) to rotate. S4. After the third rack plate (24) drives the second group of first partition frames (7) and second partition frames (8) to engage, the second rack plate (19) stops moving. Then, when the material is discharged, the first telescopic rod (35) drives the sealing door (36) to move forward, and the first group of bottom mud is discharged. Then, the electric push rod (18) drives the second rack plate (19) upward. The second rack plate (19) first engages with the third gear (21). The third rack plate (24) drives the second group of first partition frames (7) and second partition frames (8) to disengage. The second group of bottom mud is discharged. The second rack plate (19) engages with the second gear. When the wheel (15) engages, the first separator (7) and the second separator (8) begin to disengage. The third set of bottom sediment is fed, and the bottom sediment is classified and collected. Subsequently, a pollutant release test between bottom sediment and water of a certain thickness under simulated natural conditions in the laboratory is conducted to obtain the release amount per unit area of ​​each layer of bottom sediment. Based on the ratio of the three sets of bottom sediment samples obtained in the small-scale test and the current sampling, the actual total amount of bottom sediment pollutants released is calculated. Based on the comparative analysis of the total amount of bottom sediment pollutant release and the water body's pollution carrying capacity, a method for determining the depth of bottom sediment environmental dredging can be obtained.

Images