River and lake bottom mud stirring device

Abstract

The application discloses a river and lake sediment stirring device, and belongs to the field of environmental treatment equipment. The device comprises a shell, a stirring shaft arranged in the shell in the transverse direction, stirring blades arranged on the outer wall of the stirring shaft, a feeding port, a feeding opening and a liquid discharge pipe arranged on the shell, a load plate arranged below the stirring shaft in the shell, a sludge discharge pipe arranged on the load plate, the load plate moving in the vertical direction of the shell, a partition arranged above the stirring shaft in the shell, the partition expanding or contracting in the transverse direction, and the shell being divided into two spaces in the upper and lower directions when the partition expands. The river and lake sediment stirring device can stir river and lake sediments, improve the dehydration efficiency, and discharge the water and solid matters in the river and lake sediments respectively, so as to improve the dehydration effect.

Description

Technical Field

[0001] This invention relates to the field of environmental remediation equipment, specifically a river and lake bottom sediment mixing device. Background Technology

[0002] River and lake sediment is a type of solid waste generated from sewage treatment, dredging projects, and other processes. It is rich in pathogens and microorganisms, and improper handling can easily cause secondary pollution. Current treatment methods mainly include landfilling, land application, and incineration. These methods easily cause secondary environmental pollution and fail to effectively utilize the river and lake sediment.

[0003] Therefore, the resource utilization of river and lake sediment is an effective treatment method, which can effectively reduce problems such as "sludge surrounding cities" and protect the ecological environment. By processing river and lake sediment into organic fertilizers, expanded clay pellets, etc., dependence on external resources can be reduced, land occupation can be reduced, and the restoration and improvement of the ecological environment can be promoted.

[0004] In the process of resource utilization of river and lake bottom sediment, most of the processes require dewatering the dredged river and lake bottom sediment. During this process, it is necessary to ensure the separation of water and solid matter in the river and lake bottom sediment while taking efficiency into account. Summary of the Invention

[0005] The purpose of this invention is to address the above problems by providing a river and lake bottom sediment stirring device that can stir river and lake bottom sediment to improve dewatering efficiency, while simultaneously discharging water and solid matter from the river and lake bottom sediment to enhance the dewatering effect.

[0006] To achieve the above objectives, the present invention employs a river and lake bottom sediment mixing device, comprising a shell, an inner side of which a stirring shaft is arranged laterally, and stirring blades are arranged on the outer wall of the stirring shaft. The shell is provided with a feed inlet, a feeding port, and a drain pipe. A carrying plate is arranged below the stirring shaft inside the shell, and a sludge discharge pipe is arranged on the carrying plate. The carrying plate moves vertically along the shell. A partition is arranged above the stirring shaft inside the shell, and the partition expands or contracts laterally. When expanded, the partition divides the interior of the shell into upper and lower spaces. The partition separates the precipitate and clear liquid generated after flocculation, thereby reducing the mixing of precipitate and clear liquid during the discharge process.

[0007] Furthermore, to drive the partition to unfold or retract, a guide rail is provided laterally inside the housing, and a sliding part is provided on the guide rail. The two ends of the partition are respectively connected to the sliding part and the inner wall of the housing.

[0008] Furthermore, since the volume of the precipitate produced after flocculation will fluctuate within a certain range due to factors such as wastewater composition and flocculant type, the height of the solid-liquid boundary line will also change. The solid-liquid boundary line is moved below the partition section by raising and lowering the carrier plate. In order to generate stronger stirring force and allow the flocculant and river / lake sediment to be more fully stirred and mixed in the shell, the size of the stirring blades needs to be set as large as possible. This may cause the carrier plate to collide with the stirring blades when it rises, or the carrier plate may not be able to rise to the specified height in order to avoid the stirring blades. Therefore, the stirring blades extend and retract radially along the stirring shaft.

[0009] Furthermore, in order to make the stirring blade extend and retract, the stirring blade is composed of multiple sleeves that are sealed and nested in sequence. The end face of the outermost sleeve is closed, and the innermost sleeve is fixedly installed on the outer wall of the stirring shaft. The stirring blade is provided with a telescopic drive mechanism for driving its extension and retraction.

[0010] Furthermore, the stirring shaft is hollow, and a transverse shaft concentric with it is provided inside the stirring shaft; the telescopic drive mechanism includes a threaded section and a receiving tube, the threaded section is threadedly connected to the receiving tube, one of the threaded section or the receiving tube is fixedly connected to the outermost sleeve, and the other extends into the stirring shaft and is drivenly connected to the transverse shaft; the transverse shaft is detachably connected to the output shaft of the adjusting motor, and the adjusting motor is located on the outside of the housing.

[0011] Furthermore, during the addition of flocculant and the flocculation reaction, the stirring blades agitate the material inside the shell. At this time, the diameter of the stirring blades is at its maximum. It is required that the transverse shaft and the stirring shaft rotate synchronously to avoid uncontrolled expansion and contraction of the stirring blades during the agitation process. After the agitation is completed, the transverse shaft and the stirring shaft are required to rotate relative to each other to ensure controlled expansion and contraction of the stirring blades. The stirring shaft is fixedly connected to the end cover on the side of the regulating motor. The end cover is connected to the inner wall of the shell through a sealed bearing. A fixed connecting sleeve concentric with the transverse shaft is provided. The fixed connecting sleeve is open on the side of the regulating motor. A movable connecting part is provided on the output shaft of the regulating motor. The movable connecting part passes through the end cover and connects or separates from the fixed connecting sleeve under the action of the connecting drive mechanism.

[0012] Furthermore, to ensure the synchronization of the movement of the transverse shaft and the stirring shaft, a swing key is rotatably provided on the side wall of the fixed connecting sleeve. When the movable connecting part is separated from the fixed connecting sleeve, one end of the swing key extends into the fixed connecting sleeve and is located on the movement path of the movable connecting part. At this time, the other end of the swing key extends out of the fixed connecting sleeve and cooperates with the drive groove on the end cover.

[0013] Furthermore, in order to drive the rotation of the stirring shaft while preventing the stirring shaft from rotating during the extension and retraction of the stirring blades, the stirring shaft passes through the housing and is connected to the stirring motor at the end opposite to the adjusting motor. A positioning groove is provided on the end face of the stirring shaft extending out of the housing. The positioning groove is adapted to the positioning part, and the positioning part moves under the drive of the positioning drive mechanism.

[0014] Furthermore, to prevent river and lake sediment from seeping out through the gap between the carrier plate and the shell, a sliding groove is provided on the inner wall of the shell, the side end of the carrier plate extends into the sliding groove, and a sealing mechanism is provided between the inner wall of the sliding groove and the carrier plate.

[0015] Furthermore, the middle of the carrying plate is recessed downwards, the sludge discharge pipe is located at the lowest point of the carrying plate, and a conveying pipe is provided at the lower end of the shell. The lower end of the sludge discharge pipe is inserted into the conveying pipe to ensure the collection of sediment.

[0016] The beneficial effects of this invention are: during the dehydration process, the rotation of the stirring shaft allows the river and lake bottom mud and flocculant inside the shell to mix quickly and thoroughly, thereby improving the dehydration efficiency.

[0017] At the same time, after the flocculation reaction ends and the sedimentation is completed, the movement of the carrier plate is controlled according to the solid-liquid boundary line. Then the separator unfolds to separate the solid and liquid. In this way, the amount of water carried out during the discharge of sediment can be reduced, ensuring the dehydration effect. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure with the partition section retracted.

[0019] Figure 2 This is a schematic diagram of the structure with the partition in its unfolded state.

[0020] Figure 3 This is a schematic diagram of a partial internal structure of the stirring shaft.

[0021] Figure 4 for Figure 3 Schematic diagram of the structure at point A in the middle.

[0022] Figure 5 This is a schematic diagram of an assembly structure for a telescopic regulating pipe.

[0023] The text labels in the diagram represent: 1. Shell; 2. Stirring shaft; 3. Stirring blade; 4. Feed inlet; 5. Feed port; 6. Drain pipe; 7. Carrier plate; 8. Sludge discharge pipe; 9. Divider; 10. Guide rail; 11. Sliding part; 12. Sleeve; 13. Telescopic drive mechanism; 14. Transverse shaft; 15. Threaded section; 16. Receiving pipe; 17. Adjusting motor; 18. End cap; 19. Fixed connecting sleeve; 20. Movable connecting part; 21. Connecting drive mechanism; 22. Swing key; 23. Stirring motor; 24. Positioning part; 25. Positioning drive mechanism; 26. Sliding groove; 27. Sealing mechanism; 28. Conveying pipe. Detailed Implementation

[0024] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory, and should not be used to limit the scope of protection of the present invention in any way.

[0025] Example 1: As Figure 1-2 As shown in the figure, this embodiment discloses a river and lake bottom sediment mixing device, which includes a shell 1. A stirring shaft 2 is arranged horizontally inside the shell 1. The stirring shaft 2 rotates around its axis under the drive of a stirring motor 23. A stirring blade 3 is arranged on the outer wall of the stirring shaft 2. The stirring shaft 2 is located at the lower part of the shell 1. The shell 1 is provided with a feed inlet 4, a feeding port 5 and a drain pipe 6. The number of feeding ports 5 can be set to facilitate the simultaneous addition of PAM, PAC, etc. into the shell. A pressure relief pipe is provided at the upper end of the shell 1. Inside the housing 1, below the stirring shaft 2, a carrying plate 7 is provided, and a mud discharge pipe 8 is provided on the carrying plate 7. The carrying plate 7 moves vertically along the housing 1 under the drive of a hydraulic cylinder, etc. The outer side wall of the carrying plate 7 is sealed to the inner side wall of the housing 1 to prevent leakage of liquids, etc. Inside the housing 1, above the stirring shaft 2, a partition 9 is provided. The partition 9 can be expanded or retracted laterally. The partition 9 can be made of nylon, fluororubber coated cloth, etc., or it can be composed of multiple metal plates nested in sequence, or it can be composed of multiple plates combined. The upper and lower ends of two adjacent plates are connected by slide rails such as T-shaped rails and dovetail rails. The end of the slide rail is provided with a limiting part with an outer diameter larger than the slide rail itself to ensure that two adjacent plates will not fall off, and also to ensure that the partition 9 can be expanded or retracted. When the partition 9 is expanded, it divides the interior of the housing 1 into upper and lower spaces. Therefore, a guide rail 10 is provided laterally inside the housing 1. To improve the strength of the guide rail 10, a crossbeam can be provided in the middle of the housing 1. The guide rail 10 is placed on both sides of the crossbeam. A sliding part 11 is provided on the guide rail 10. The sliding part 11 moves along the guide rail 10 under the drive of a linear module, a motor, etc. The two ends of the partition 9 are respectively connected to the sliding part 11 and the inner wall of the housing 1. The drain pipe 6 is located above the partition 9.

[0026] Specific working process: The filtered slurry enters the shell 1 through the feed inlet 4. At this time, the partition 9 is in a closed state and the sludge discharge pipe 8 is closed.

[0027] When the slurry enters the shell 1, flocculant and other agents are added into the shell 1 through the feed port 5. At the same time, the stirring shaft 2 starts to rotate to stir the material in the shell 1 to ensure that the flocculation reaction is fully carried out. After flocculation is completed and the flocculent settles, the carrier plate begins to rise and fall. During the rising and falling process, the height of the sediment is calculated by visual inspection and by measuring the time of ultrasonic wave propagation in the liquid and the reflected signal. The position of the upper surface of the sediment is also measured by setting a density sensor at a specified height in the shell to detect changes in material density. This ensures that the solid-liquid boundary line moves below the separator 9. Subsequently, the separator 9 unfolds to separate the sediment and the clear liquid. Then, the clear liquid produced by flocculation is pumped out of the shell 1 using a water pump connected to the drain pipe 6.

[0028] After the clear liquid is discharged, the sludge discharge pipe 8 is opened, and the sediment is discharged from the sludge discharge pipe 8. The sediment is dried using a filter press, dryer, etc., to obtain dried bottom mud, the moisture content of which is no higher than 10%.

[0029] Example 2, as Figure 3 , 5 As shown, other structures and working processes in this embodiment refer to Embodiment 1, but in this embodiment, the stirring blade 3 extends and retracts radially along the stirring shaft 2.

[0030] Therefore, the stirring blade 3 is formed by multiple sleeves 12 sealed and nested in sequence. A piston ring or other sealing and filling mechanism is provided between adjacent sleeves. The end face of the outermost sleeve 12 is closed, and the innermost sleeve 12 is fixedly set on the outer wall of the stirring shaft 2. A telescopic drive mechanism 13 is provided inside the stirring blade 3. The telescopic drive mechanism 13 can be a hydraulic cylinder, an electric push rod, etc. One end of the telescopic drive mechanism 13 is fixed on the stirring shaft 2, and the other end is fixed on the outermost sleeve 12. The stirring blade 3 is driven to extend and retract radially along the stirring shaft 2 by the extension and retraction of the telescopic drive mechanism 13.

[0031] Since the stirring shaft 2 rotates, to simplify the drive mechanism and optimize the circuit layout, the stirring shaft 2 is hollow inside. A transverse shaft 14, concentric with the stirring shaft 2, is installed inside. Supports are spaced along the axial direction on the inner wall of the stirring shaft, and bearings are installed between the supports and the transverse shaft 14 to install and ensure the coaxiality of the transverse shaft 14 and the stirring shaft 2. The telescopic drive mechanism 13 includes a threaded section 15 and a receiving tube 16. The threaded section 15 is threadedly connected to the receiving tube 16. One of the threaded section 15 or the receiving tube 16 is fixedly connected to the outermost sleeve 12, and the other extends into the stirring shaft 2 and is driven by the transverse shaft 14. Figure 4One end of the threaded section 15 is fixedly mounted on the inner end face of the outermost sleeve 12, and the other end of the threaded section 15 extends into the threaded groove of the receiving tube 16. The receiving tube 16 passes through the bearing on the side wall of the stirring shaft 2 and connects to the transmission bevel gear. A drive main gear that meshes with the transmission bevel gear is provided on the transverse shaft 14. Figure 5 One end of the receiving tube 16 is fixedly set on the inner end face of the outermost sleeve 12, and the other end of the receiving tube 16 is provided with a threaded groove. One end of the threaded section 15 is threadedly connected to the threaded groove, and the other end of the threaded section 15 is provided with a rotating shaft. The rotating shaft passes through the bearing on the side wall of the stirring shaft 2 and is connected to the transmission bevel gear. The transverse shaft 14 is provided with a driving main gear that meshes with the transmission bevel gear. The telescopic drive mechanism 13 and the transverse shaft 14 can also be connected by other gears or other means of transmission.

[0032] The transverse shaft 14 and the output shaft of the regulating motor 17 are detachably connected by a coupling or the like, and the regulating motor 17 is located on the outside of the housing.

[0033] Specific working process: During the rotation of the stirring blade 3 along with the stirring shaft 2, the transverse shaft 14 separates from the output shaft of the regulating motor 17. The transverse shaft 14 moves synchronously with the stirring shaft 2. For this purpose, a clamping mechanism can be set inside the stirring shaft 2 to clamp the transverse shaft 14 during the rotation of the stirring shaft 2, so that the transverse shaft 14 moves synchronously with the stirring shaft 2. After stirring is completed, before the carrier plate moves, the transverse shaft 14 is connected to the output shaft of the regulating motor 17. If a clamping mechanism is set, the transverse shaft is released at this time. Subsequently, the transverse shaft 14 rotates under the drive of the regulating motor 17. Since the stirring shaft 2 is in a stopped state at this time, the rotation of the transverse shaft 14 will drive the threaded section 15 or the receiving tube 16 to rotate, so that the length of the telescopic drive mechanism 13 is reduced, thereby putting the stirring blade 3 in a retracted state.

[0034] Example 3, as Figure 3-4As shown, other structures and working processes in this embodiment refer to Embodiment 2. However, in this embodiment, the stirring shaft 2 is fixedly connected to the end cover 18 on one side of the regulating motor 17. The end cover 18 includes a cover plate connected to the end face of the stirring shaft 2 and a sealing ring fixedly disposed on the cover plate. The sealing ring is connected to the inner wall of the housing 1 through a sealing bearing. A through hole is provided in the middle of the cover plate. A fixed connecting sleeve 19 concentric with the transverse shaft 14 is fixedly disposed on the transverse shaft 14. The fixed connecting sleeve 19 passes through the through hole. The fixed connecting sleeve 19 is open on one side of the regulating motor 17. Its open part is either a polygon with a non-circular cross section or has a long key on the inner wall arranged along the length direction of the stirring shaft 2. A movable connecting part 20 is provided on the output shaft of the regulating motor 17. The movable connecting part 20 and the output shaft of the regulating motor 17 are keyed together. The movable connecting part 20 passes through the end cover 18 and connects or separates from the fixed connecting sleeve 19 under the action of the connecting drive mechanism 21. The connecting drive mechanism 21 can be an electric push rod, a cylinder, etc. The shape of the movable connecting part 20 is adapted to the fixed connecting sleeve 19.

[0035] The fixed connecting sleeve 19 has a long groove on its side wall. The groove is connected to the swing key 22 by a pin, torsion spring, etc. When the movable connecting part 20 is not connected to the fixed connecting sleeve 19, one end of the swing key 22 extends into the fixed connecting sleeve 19 and is located on the moving path of the movable connecting part 20. The other end of the swing key 22 extends out of the fixed connecting sleeve 19 and cooperates with the drive groove on the cover plate.

[0036] In operation: During stirring, the swing key 22 is in a vertical position and locked in the drive groove, causing the horizontal shaft 14 to rotate synchronously with the stirring shaft 2. After stirring, the connecting drive mechanism 21 drives the movable connecting part 20 to extend into the fixed connecting sleeve 19. During the movement of the movable connecting part 20, it pushes the swing key 22, causing the swing key 22 to rotate to a horizontal position, at which point the swing key 22 separates from the drive groove. Then, the motor 17 is adjusted to rotate the horizontal shaft 14, driving the stirring blades 3 to retract. When it is necessary to stir the material in the shell 1 again, the motor 17 is adjusted to rotate in the opposite direction, causing the stirring blades 3 to unfold. Then, the movable connecting part 20 separates from the fixed connecting sleeve 19, and the swing key 22, no longer restricted by the movable connecting part 20, returns to a vertical position under the action of the torsion spring, etc. As the stirring shaft 2 rotates, the swing key 22 re-locks into the drive groove.

[0037] Example 4, as Figure 3-4As shown, other structures and working processes in this embodiment refer to Embodiment 2 or 3. However, in this embodiment, the stirring shaft 2 passes through the housing 1 and is connected to the stirring motor 23 at the end opposite to the adjusting motor 17. A positioning groove is provided on the end face of the stirring shaft 2 extending out of the housing 1. The positioning groove is a non-circular polygon. The positioning groove is adapted to the positioning part 24. The positioning part 24 moves under the drive of the positioning drive mechanism 25. The positioning drive mechanism 25 can be a hydraulic cylinder, an electric push rod, etc.

[0038] Specific working process: When the stirring shaft 2 is working, the positioning groove separates from the positioning part 24. When the stirring shaft 2 stops working, the positioning part 24 engages with the positioning groove to fix the stirring shaft 2.

[0039] Example 5, as Figure 3-4 As shown, other structures and working processes in this embodiment refer to embodiments 1-4. However, in this embodiment, a sliding groove 26 is provided on the inner wall of the housing 1. The side end of the carrying plate 7 extends into the sliding groove 26. A sealing mechanism 27 is provided between the inner wall of the sliding groove 26 and the carrying plate 7. The sealing mechanism 27 can be a waterproof plate fixedly installed on the outer wall of the carrying plate 7. A waterproof groove is provided on the inner wall of the sliding groove 26. The waterproof plate is inserted into the waterproof groove. As the carrying plate 7 moves, the waterproof plate moves within the waterproof groove. A waterproof strip, sealing ring, etc. are provided at the opening of the waterproof groove. The sealing mechanism 27 can also be a waterproof cloth, which connects the inner wall of the sliding groove 26 and the carrying plate 7.

[0040] The middle part of the carrying plate 7 is recessed downwards, the mud discharge pipe 8 is located at the lowest point of the carrying plate 7, and the lower end of the housing 1 is provided with a conveying pipe 28. The lower end of the mud discharge pipe 8 is inserted into the conveying pipe 28, and the conveying pipe 28 extends out of the housing 1.

[0041] Specific working process: A linear drive mechanism, such as a hydraulic cylinder, is installed at the lower end of the housing 1. The piston rod of the linear drive mechanism is connected to the lower end of the carrying plate 7 to drive the carrying plate 7 to rise and fall. A buffer mechanism is also installed inside the housing. When the carrying plate 7 is in the stirring state, the lower end of the carrying plate 7 contacts the buffer mechanism. When discharging sediment, the sludge discharge pipe 8 is opened, allowing the sediment to enter the conveying pipe 28 through the sludge discharge pipe 8. The conveying pipe 28 extends out of the housing 1 and connects with the subsequent processing mechanism.

[0042] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0043] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only for the purpose of helping to understand the method and core ideas of the present invention. The above descriptions are only preferred embodiments of the present invention. It should be noted that due to the limitations of textual expression, while there are objectively infinite specific structures, those skilled in the art can make several improvements, modifications, or changes without departing from the principles of the present invention, and can also combine the above technical features in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the inventive concept and technical solution to other situations without modification, should all be considered within the scope of protection of the present invention.

Claims

1. A river and lake sediment mixing device, comprising a shell (1), a mixing shaft (2) is arranged in the shell (1) in the transverse direction, a mixing blade (3) is arranged on the outer wall of the mixing shaft (2), an inlet (4), a feeding port (5) and a liquid discharge pipe (6) are arranged on the shell (1), characterized in that, The shell (1) is provided with a load plate (7) below the stirring shaft (2), the load plate (7) is provided with a sludge discharge pipe (8), the load plate (7) moves vertically along the shell (1), the shell (1) is provided with a partition (9) above the stirring shaft (2), the partition (9) expands or contracts along the transverse direction, and the partition (9) expands to divide the shell (1) into two spaces vertically; the stirring blade (3) expands or contracts along the radial direction of the stirring shaft (2), the stirring blade (3) is sequentially sealed and nested by a plurality of sleeve pipes (12), the end face of the outermost sleeve pipe (12) is closed, and the innermost sleeve pipe (12) is fixedly arranged on the outer wall of the stirring shaft (2); the stirring blade (3) is provided with a telescopic drive mechanism (13) for driving the expansion and contraction thereof, the stirring shaft (2) is hollow, and the stirring shaft (2) is provided with a transverse shaft (14) concentric with the same; the telescopic drive mechanism (13) comprises a threaded section (15) and a receiving pipe (16), the threaded section (15) is threadedly connected with the receiving pipe (16), one of the threaded section (15) or the receiving pipe (16) is fixedly connected with the outermost sleeve pipe (12), and the other one is inserted into the stirring shaft (2) and is in transmission connection with the transverse shaft (14); the transverse shaft (14) is detachably connected with the output shaft of an adjusting motor (17), the adjusting motor (17) is arranged outside the shell (1), the stirring shaft (2) is fixedly connected with an end cover (18) on the side of the adjusting motor (17), the end cover (18) is connected with the inner wall of the shell (1) through a sealing bearing, the transverse shaft (14) is provided with a fixed connection sleeve (19) concentric with the same, the fixed connection sleeve (19) is open on the side of the adjusting motor (17), the output shaft of the adjusting motor (17) is provided with a movable connection part (20), the movable connection part (20) is connected or separated from the fixed connection sleeve (19) through the end cover (18) under the action of a connection drive mechanism (21), and a swing key (22) is rotatably arranged on the side wall of the fixed connection sleeve (19); when the movable connection part (20) is separated from the fixed connection sleeve (19), one end of the swing key (22) is inserted into the fixed connection sleeve (19) and located on the movement path of the movable connection part (20), and at this moment, the other end of the swing key (22) is out of the fixed connection sleeve (19) and matched with the driving groove on the end cover (18).

2. The river and lake sediment mixing device according to claim 1, characterized in that, The shell (1) is provided with a guide rail (10) along the transverse direction, the guide rail (10) is provided with a sliding part (11), and the two ends of the partition (9) are connected with the sliding part (11) and the inner wall of the shell (1) respectively.

3. The river and lake sediment mixing device according to claim 1, characterized in that, The stirring shaft (2) is in transmission connection with a stirring motor (23) through the shell (1) on the opposite end of the adjusting motor (17), the end face of the stirring shaft (2) extending out of the shell (1) is provided with a positioning groove, the positioning groove is matched with a positioning part (24), and the positioning part (24) moves under the drive of a positioning drive mechanism (25).

4. The river and lake sediment mixing device according to claim 1, characterized in that, The inner side wall of the shell (1) is provided with a sliding groove (26), the side end of the object plate (7) extends into the sliding groove (26), and a sealing mechanism (27) is arranged between the inner side wall of the sliding groove (26) and the object plate (7).

5. The river and lake sediment mixing device according to claim 1, characterized in that, The middle part of the object plate (7) is concave downward, the mud discharge pipe (8) is arranged at the lowest part of the object plate (7), and the lower end of the mud discharge pipe (8) is inserted into the conveying pipe (28) arranged at the lower end of the shell (1).

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