A buoyant unloading dredging and permeation equipment suitable for soft sandy riverbed

Abstract

This invention discloses a buoyancy-unloading type dredging and infiltration-promoting device suitable for soft sandy riverbeds, comprising: a housing, a drive assembly, a buoyancy assembly, and a spiral suction assembly. The drive assembly consists of two augers respectively mounted on one side of the housing. A bracket connected to the augers is mounted on the housing, and a first drive motor for driving the augers to rotate is mounted on the bracket. The buoyancy assembly consists of two floats respectively mounted on one side of the housing, mounted on a bracket above the housing. The spiral suction assembly includes a spiral suction component located at the front of the housing and a suction pump located at the rear of the housing. The mud outlet of the spiral suction component is connected to the inlet of the suction pump via a hose. This invention maintains the ground pressure of the dredging and infiltration-promoting device within a set range on soft sandy riverbeds, preventing the machine from sinking into the riverbed. Under the action of "micro-contact," it can effectively remove fine-particle silt or soil film that hinders the infiltration of river water.

Description

Technical Field

[0001] This invention relates to the field of riverbed dredging technology, specifically to a buoyancy-unloading type dredging and infiltration-promoting device suitable for soft sandy riverbeds. Background Technology

[0002] The water-filled pits in the Dasha River channel are primarily sandy in structure, which could normally self-regulate through excellent natural infiltration. However, due to long-term natural sedimentation and human disturbance, this ecosystem faces severe challenges. Dust and mud have been mixing into the water-filled pits for a long time, forming a dense impermeable layer within the sandy layer, cutting off the normal infiltration path of water and causing the following problems: 1) Water retention capacity drops sharply: The silt layer hinders water infiltration, water cannot effectively penetrate and retain water resources, and the water retention function is basically lost.

[0003] 2) Serious waste of water resources: The water from the river that flows through the area cannot replenish the groundwater, and most of it is lost rapidly through evaporation, resulting in a waste of valuable resources.

[0004] 3) Deterioration of the ecological environment: The decline in water quality alters the aquatic system, which in turn affects the growth of surrounding vegetation and damages regional biodiversity.

[0005] Therefore, managing water-filled pits, removing silt, and restoring their water-retention function has become an urgent and necessary ecological restoration task. However, current dredging equipment suffers from problems such as sinking as soon as it enters the riverbed due to the weight of the machine, making it difficult to carry out dredging. This has caused great trouble for the dredging work of such soft riverbeds. Summary of the Invention

[0006] To address the aforementioned technical problems, this invention provides a buoyancy-unloading dredging and infiltration-promoting device suitable for soft sandy riverbeds.

[0007] The technical solution of the present invention is: a buoyancy unloading type dredging and seepage promotion device suitable for soft sandy riverbeds, comprising: a box body, a drive assembly for driving the device forward, a buoyancy assembly for controlling the device's buoyancy, and a spiral agitation assembly for agitation and dredging. The drive assembly consists of two augers respectively arranged on one side of the housing. The housing is provided with a bracket that is rotatably connected to the augers, and the bracket is provided with a first drive motor for driving the augers to rotate. The buoyancy assembly consists of two floats respectively disposed on one side of the tank, and the floats are mounted on the support located above the tank; The spiral agitator assembly includes a spiral agitator located at the front of the housing and a suction pump located at the rear of the housing. The mud outlet of the spiral agitator is connected to the inlet of the suction pump via a hose, and the outlet of the suction pump is connected to the outside via a pipe.

[0008] Furthermore, the front end of the jiaolong is provided with a first protective cover for guiding airflow, and the output shaft of the first drive motor is connected to the rear end of the jiaolong.

[0009] Explanation: By setting up the first protective cover, its flow guiding design can divert large particles and hard impurities, preventing them from directly impacting the spiral blades, reducing the probability of equipment jamming, and ensuring the stability of continuous operation.

[0010] Furthermore, the rear end of the jiaolong is equipped with a second protective cover for protecting the first drive motor.

[0011] Note: By setting up a second protective cover and designing multiple seals for sand and water protection, the stable operation of the first drive motor can be effectively protected. It should be noted that the multiple seals for sand and water protection use rubber sleeve gaskets, skeleton oil seals, etc., to form a physical isolation barrier, and no special limitations are imposed on this.

[0012] Furthermore, the float has a water inlet, which is connected to a submersible pump mounted on the support via a pipe. The submersible pump is equipped with a switch valve for controlling the water supply to and from the float.

[0013] Note: By setting up submersible pumps and switching valves, the buoyancy of the floats can be effectively controlled, thereby making the buoyancy assembly variable and dynamically offsetting the weight of the whole machine. This controls the ground pressure of the dredging and seepage promotion equipment on the soft sandy riverbed to remain within the set range, avoiding the problem of the machine getting stuck in the riverbed and being unable to drive forward.

[0014] Furthermore, the spiral agitator includes an agitator housing, a spiral roller brush rotatably disposed within the agitator housing along the axial direction of the agitator housing, and a second drive motor disposed on one side of the agitator housing for driving the spiral roller brush to rotate; The agitator housing is hinged to the box body via two sets of connecting arms, and a hydraulic cylinder for driving the agitator housing to lift is hinged to the box body. The hydraulic cylinder is arranged in a one-to-one correspondence with the connecting arms. The mud outlet is located at the rear end of the agitator housing.

[0015] Explanation: By using a spiral agitator, the high-speed rotating spiral blades continuously cut and agitate the surface layer of the soft sandy riverbed, breaking the high water content and low viscosity silt into a uniform slurry, significantly reducing its structural strength and creating physical conditions for subsequent suction and discharge.

[0016] Furthermore, the two sets of connecting arms are connected to the agitation housing through the carrier chamber. The agitation housing is composed of two sets of agitation half-shells. Each agitation half-shell is hinged to the inner sidewall of the carrier chamber through at least one set of hinge assemblies. The hinge assembly includes a torsion spring shaft for hinged to the two sets of agitation half-shells, and connecting seats respectively provided on the carrier chamber and the agitation half-shells. A plurality of magnetic blocks for alignment are embedded on the opposite side of the two sets of agitation half-shells. The spiral roller brush consists of two sets of spiral half rollers, each spiral half roller including a shaft and spiral blades disposed on the shaft.

[0017] Note: Considering the varying depths of the mud, during operation, there may be sudden obstacles requiring dredging at the same depth, making progress difficult in some areas. Even with variable adjustment of the buoyancy assembly, this problem persists. By redesigning the current laterally rigid spiral agitator into a split shell structure with two parts distributed on the left and right sides, and combining the physical action of the torsion spring shaft, it can quickly respond in areas where it is difficult to move, changing the lateral agitation to oblique agitation, thereby reducing lateral resistance to water / mud and providing response time for monitoring elements such as pressure sensors and variable adjustment of the buoyancy assembly.

[0018] Furthermore, the second drive motor is provided in two sets, respectively located on the inner wall of the agitation half shell on one side. The output end of the second drive motor is connected to one end of the shaft of the spiral half roller, and the other end of the shaft is rotatably connected to the support plate mounted inside the agitation half shell. A gap is left between the two support plates to allow the agitation half shells on both sides to deflect inward.

[0019] Note: By setting up two sets of second drive motors, the spiral half-rollers on both sides can be driven separately, which has the advantage of high driving efficiency.

[0020] Furthermore, the second drive motor is provided in a set and is located on the inner wall of the agitator half shell on either side. The output end of the second drive motor is connected to one end of the shaft of the spiral half roller, and the other ends of the two shafts are connected by a coupling. The coupling comprises a cylindrical housing, annular flanges integrally formed with the cylindrical housing on both end faces, and hemispherical heads located on both sides of the cylindrical housing and rotatably connected to the corresponding annular flanges. The annular flanges have multiple circumferentially spaced balls on their inner side, and a protruding edge on their outer edge for limiting and fitting the hemispherical heads. Each hemispherical head has multiple ball grooves corresponding to the balls, which engage with the balls when the hemispherical head swings in any direction. The hemispherical head is provided with a splined shaft connected to the splined shaft.

[0021] Explanation: The coupling's structural design allows for coaxial transmission even when the two shafts swing at a certain angle. Therefore, only one set of second drive motors is needed to drive the two spiral half-rollers. Although its driving efficiency is not as high as the scheme with two sets of second drive motors, it only requires one set of second drive motors, reducing the demand for drive motors and lowering the operating and maintenance costs of the motors.

[0022] Furthermore, the spiral blade is composed of a fixed spiral blade and a movable spiral blade. The length ratio of the fixed spiral blade to the movable spiral blade on the shaft is 6-8:2-4. The movable spiral blade is located at the other end of the shaft and is slidably connected to the shaft. A steel rope is provided at the end of the movable spiral blade. The steel rope passes through the inside of the shaft, connects to the guide wheel of the shaft, and is then fixedly connected to the carrier. It is used to move and compress the movable spiral blade by stretching the steel rope.

[0023] Explanation: By combining fixed and moving spiral blades and utilizing the elastic compressibility of the material used in the moving spiral blades, the agitation half-shell can have a larger swing angle while maintaining the inherent distance between the two spiral half-rollers. This allows for a larger angle of oblique agitation and suction, thereby reducing the lateral resistance to water / mud to a greater extent.

[0024] Furthermore, the inner wall of the container is provided with a spring rod for detecting the water / mud resistance of the agitator half-shell, and a pressure sensor is provided at the contact end of the spring rod and the agitator half-shell.

[0025] Explanation: By setting the pressure sensor, it provides adjustment parameters for the variable adjustment of the buoyancy assembly when there are differences in the depth of the bottom sediment.

[0026] Furthermore, a flexible mesh is provided at the connection point of the two sets of agitation half-shells.

[0027] Explanation: The flexible mesh bag can intercept large sludge particles, allowing the spiral half-roller to fully cut and mix them, breaking the high-moisture, low-viscosity sludge into a uniform slurry.

[0028] The beneficial effects of this invention are: (1) The present invention can dynamically offset the weight of the whole machine by adjusting the buoyancy assembly, so that the ground pressure of the dredging and seepage promotion equipment on the soft sand riverbed is kept within the set range, thus avoiding the problem that the machine gets stuck in the riverbed and is difficult to drive.

[0029] (2) The dredging and infiltration promotion equipment of the present invention is in a "micro-contact" state with the soft sand riverbed, which can improve the dredging effect while avoiding damage to the sand layer at the bottom of the riverbed and avoiding affecting the original natural infiltration function of the soft sand riverbed. That is, the dredging and infiltration promotion equipment of the present invention is not simply pumping mud, but removing the fine particle silt layer or soil film that hinders the infiltration of river water. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall structure of the dredging and seepage promotion equipment in Embodiment 1 of the present invention (front); Figure 2 This is a schematic diagram of the overall structure of the dredging and seepage promotion equipment in Embodiment 1 of the present invention (rear). Figure 3 This is a schematic diagram of the support structure of the dredging and seepage promotion equipment of the present invention; Figure 4 It is the spiral agitator component of the dredging and seepage promotion equipment in Embodiment 1 of the present invention; Figure 5 This is a schematic diagram of the overall structure of the dredging and seepage promotion equipment in Embodiment 2 of the present invention (front); Figure 6 This is a schematic diagram of the overall structure of the dredging and seepage promotion equipment in Embodiment 2 of the present invention (rear). Figure 7 It is the spiral agitator component of the dredging and seepage promotion equipment in Embodiment 2 of the present invention; Figure 8 This is a schematic diagram of the overall structure of the dredging and seepage promotion equipment in Embodiment 3 of the present invention (front); Figure 9 It is the spiral agitator (flat) of the dredging and seepage promotion equipment in Embodiment 3 of the present invention; Figure 10 It is the agitator half-shell (flat) of the dredging and seepage promotion equipment in Embodiment 3 of the present invention; Figure 11 It is the spiral agitator (inclined) of the dredging and seepage promotion equipment in Embodiment 3 of the present invention; Figure 12 It is the inclined agitator half-shell of the dredging and seepage-promoting device in Embodiment 3 of the present invention. Figure 13 This is a top view (flat view) of the agitator half-shell of the dredging and seepage-promoting device in Embodiment 4 of the present invention. Figure 14 This is a top view (oblique view) of the agitator half-shell of the dredging and seepage-promoting device in Embodiment 4 of the present invention. Figure 15 This is a schematic diagram (flat) of the coupling structure of the spiral agitator in Embodiment 3 of the present invention; Figure 16 This is a schematic diagram (oblique) of the coupling structure of the spiral agitator in Embodiment 3 of the present invention; Figure 17 This is a schematic diagram of the cylindrical shell structure of the coupling in Embodiment 3 of the present invention; Figure 18 This is a schematic diagram of the hemispherical head structure of the coupling in Embodiment 3 of the present invention; Among them, 1-box body, 2-drive assembly, 21-dragon, 22-first drive motor, 23-first protective cover, 24-second protective cover, 3-buoyancy assembly, 31-float, 32-water inlet, 4-spiral agitator assembly, 41-spiral agitator component, 42-suction pump, 43-hose, 44-agitator housing, 441-agitator half-shell, 442-support plate, 45-spiral roller brush, 451-spiral half-shell Roller, 452-shaft, 453-spiral blade, 454-fixed spiral blade, 455-moving spiral blade, 46-second drive motor, 47-connecting arm, 48-oil cylinder, 49-hinged assembly, 491-torsion spring shaft, 492-connecting seat, 5-bracket, 6-carrying bin, 7-coupling, 71-cylindrical housing, 72-annular flange, 73-hemispherical head, 74-ball, 75-convex edge, 76-ball groove. Detailed Implementation

[0031] The present invention will now be described in more detail with reference to specific embodiments, so as to better demonstrate the advantages of the present invention.

[0032] Example 1: As Figure 1 , 2 As shown, a buoyancy unloading type dredging and infiltration promotion device suitable for soft sandy riverbeds includes: a housing 1, a drive assembly 2 for driving the device forward, a buoyancy assembly 3 for controlling the device's buoyancy, and a spiral suction assembly 4 for dredging. like Figure 2 , 3 As shown, the drive assembly 2 consists of two augers 21 respectively disposed on one side of the housing 1. The housing 1 is provided with a bracket 5 rotatably connected to the augers 21, and the bracket 5 is provided with a first drive motor 22 for driving the augers 21 to rotate. The front end of each auger 21 is provided with a first protective cover 23 for guiding airflow, and the output shaft of the first drive motor 22 is connected to the rear end of the auger 21. The rear end of each auger 21 is provided with a second protective cover 24 for protecting the first drive motor 22. like Figure 1 As shown in Figure 2, the buoyancy assembly 3 consists of two floats 31 respectively disposed on one side of the tank 1. The floats 31 are mounted on the support 5 located above the tank 1. The floats 31 have water inlets 32, which are connected to a submersible pump disposed on the support 5 via pipes. The submersible pump is equipped with a switch valve for controlling the water supply to and from the floats. like Figure 4As shown, the spiral agitation assembly 4 includes a spiral agitator 41 located at the front of the housing 1 and a suction pump 42 located at the rear of the housing 1. The mud outlet of the spiral agitator 41 is connected to the inlet of the suction pump 42 via a hose 43, and the outlet of the suction pump 42 is connected to the outside via a pipe. The spiral agitator 41 includes an agitation housing 44, a spiral roller brush 45 rotatably disposed within the agitation housing 44 along the axial direction of the agitation housing 44, and a second drive motor 46 disposed on one side of the agitation housing 44 for driving the spiral roller brush 45 to rotate. The agitation housing 44 is hinged to the housing 1 via two sets of connecting arms 47, and a hydraulic cylinder 48 for driving the agitation housing 44 to lift is hinged on the housing 1. The hydraulic cylinder 48 and the connecting arms 47 are arranged in a one-to-one correspondence. The mud outlet is located at the rear end of the agitation housing 44.

[0033] Some parameters are shown in Table 1 below: Table 1. Parameter Table of Buoyancy Unloading Type Dredging and Seepage Promotion Equipment

[0034] The working principle of the above-mentioned buoyancy unloading dredging and infiltration equipment is as follows: the buoyancy unloading dredging and infiltration equipment is powered by the built-in power supply of the box 1 or the external power supply on the bank. The buoyancy unloading dredging and infiltration equipment is placed in the soft sand riverbed area to be treated. The submersible pump is controlled by starting the switch valve to draw water into the float 31. The equipment is submerged to the specified depth by increasing the weight of the float. Then, the first drive motor 22 is started to drive the auger 21, the second drive motor 22 is started to drive the spiral roller brush 45, and the suction pump 42 is started. During this period, based on the silt depth information obtained by the previous investigation of the soft sand riverbed, the buoyancy of the float 31 is adjusted to dynamically offset the weight of the entire equipment, so that the dredging and infiltration equipment is in a "micro-contact" state with the soft sand riverbed, thereby avoiding damage to the lower sand layer of the riverbed and avoiding affecting the original natural infiltration function of the soft sand riverbed. It should be noted that the first drive motor 22 and the second drive motor 46 are both commercially available drive motors, and the components mentioned, such as the hydraulic cylinder 48, submersible pump, suction pump 42, and switching valve, are all commercially available or can be commercially available parts that meet the function.

[0035] Example 2: This example differs from Example 1 in that, as Figure 5 , 6As shown in Figure 7, the two sets of connecting arms 47 are connected to the agitator housing 44 via the carrier 6. The agitator housing 44 is composed of two sets of agitator half-shells 441. The inner wall of the agitator half-shell 441 may have several mesh holes. Each agitator half-shell 441 is hinged to the inner side wall of the carrier 6 via three sets of hinge assemblies 49. The hinge assembly 49 includes a torsion spring shaft 491 for hinged to the two sets of agitator half-shells 441, and connecting seats 492 respectively provided on the carrier 6 and the agitator half-shells 441. Several commercially available magnetic blocks for alignment are embedded on the opposite side of the two sets of agitator half-shells 441. The spiral roller brush 45 is composed of two sets of spiral half rollers 451. Each spiral half roller 451 includes a shaft 452 and a spiral blade 453 disposed on the shaft 452. The second drive motor 46 is provided in two sets, respectively disposed on the inner wall of the agitation half shell 441 on one side. The output end of the second drive motor 46 is connected to one end of the shaft 452 of the spiral half roller 451. The other end of the shaft 452 is rotatably connected to the support plate 442 mounted inside the agitation half shell 441. A gap is left between the two support plates 442 to allow the agitation half shells 441 on both sides to deflect inward.

[0036] The working principle of the above-mentioned buoyancy unloading type dredging and seepage promotion equipment is as follows: Based on the working principle of Example 1, when encountering the problem of uneven depth of soft sand riverbed sediment, the equipment may get stuck in the silt too deep during the journey according to the original silt depth information. At this time, the water / mud resistance of the two agitator half shells 441 will increase significantly (overcoming the torque of the torsion spring shaft 491), so that the two agitator half shells 441 deflect inward along the torsion spring shaft 491, thus changing the original horizontal agitation to oblique agitation, effectively reducing the agitation resistance of the spiral half roller 451. Although a certain horizontal agitation width is sacrificed at this time, the water / mud resistance can be effectively reduced, allowing the equipment to continue to advance or providing time for dynamic adjustment of the buoyancy assembly 3.

[0037] Example 3: This example differs from Example 2 in that, as Figure 8-12 As shown, the second drive motor 46 is provided in a set and is located on the inner wall of the agitation half shell 441 on any side. The output end of the second drive motor 46 is connected to one end of the shaft 452 of the spiral half roller 451, and the other ends of the two shafts 452 are connected by a coupling 7. Among them, such as Figure 15-18As shown, the coupling 7 comprises a cylindrical housing 71, annular flanges 72 integrally formed with the cylindrical housing 71 on both end faces, and hemispherical heads 73 located on both sides of the cylindrical housing 71 and rotatably connected to the corresponding annular flanges 72. The annular flanges 72 have four circumferentially spaced balls 74 on their inner side, and a protruding edge 75 on the outer edge of the annular flanges 72 for limiting and fitting the hemispherical heads 73. The hemispherical heads 73 have four ball grooves 76 corresponding one-to-one with the balls 74, and the ball grooves 76 are used to engage with the balls 74 when the hemispherical heads 73 swing in any direction. The ball head 73 is provided with a splined shaft that is splinedly connected to the shaft 452. It should be noted that the coupling 7 can use existing bearing sealing technology to seal the transmission part (for example, both ends of the shaft 452 are provided with rotating sealing rings, and the two rings are connected by plastic / rubber sleeves that allow the coupling 7 to deform and switch), to prevent mud and sand from entering and affecting the transmission efficiency. The transmission shaft of the existing underwater dredging equipment also has this problem and also uses the same method of sealing the transmission part. The optimization here is an existing mature technology, which will not be elaborated here and should not constitute a problem that needs to be overcome to affect the implementation of this application.

[0038] The working principle of the above-mentioned buoyancy unloading type dredging and seepage promotion equipment is as follows: Based on the working principle of Example 2, through the rotational connection between one side hemispherical head 73 and the annular flange 72, and through the engagement between the ball groove 76 of the hemispherical head 73 and the rolling ball 74, the cylindrical shell 71 can be driven to rotate synchronously when the hemispherical head 73 rotates, thereby causing the other side hemispherical head 73 to rotate.

[0039] Example 4: This example differs from Example 2 or 3 in that, as Figure 13 , 14 As shown, the spiral blade 453 is composed of a fixed spiral blade 454 and a movable spiral blade 455. The length ratio of the fixed spiral blade 454 and the movable spiral blade 455 on the shaft 452 is 7:3. The movable spiral blade 455 is located at the other end of the shaft 452 and is slidably connected to the shaft 452. A steel rope is provided at the end of the movable spiral blade 455. The steel rope passes through the inside of the shaft 452, is connected to the guide wheel of the shaft 452, and is then fixedly connected to the carrier 6. It is used to move and compress the movable spiral blade 455 by stretching the steel rope. The fixed spiral blade 454 is made of 304 stainless steel, and the movable spiral blade 455 can be made of materials that can meet certain deformation and compression requirements, such as 65Mn high carbon spring steel.

[0040] The working principle of the above-mentioned buoyancy unloading type dredging and seepage promotion equipment is as follows: When the shaft 452 deflects synchronously with the agitator half shell 441, the steel rope pulls the far end of the moving spiral blade 455 to be pulled towards the near end, thereby compressing the moving spiral blade 455 (similar to spring deformation), thereby increasing the distance between the two spiral half rollers 451. This provides space for the two agitator half shells 441 to increase the deflection angle, while avoiding collision between the spiral blades 455 of the two spiral half rollers 451.

[0041] Example 5: The difference between this example and Example 4 is that the length ratio of the fixed helical blade 454 and the moving helical blade 455 on the shaft 452 is 6:4.

[0042] Example 6: The difference between this example and Example 4 is that the length ratio of the fixed helical blade 454 and the moving helical blade 455 on the shaft 452 is 8:2.

[0043] Example 7: This example differs from Example 2 or 3 in that the inner wall of the container 6 is provided with a spring rod for detecting the water / mud resistance of the agitated half-shell 441, and a pressure sensor is provided at the contact end of the spring rod and the agitated half-shell 441.

[0044] The working principle of the above-mentioned buoyancy unloading type dredging and seepage promotion equipment is as follows: Based on the working principle of Example 2 or 3, the pressure sensor provides pressure values ​​to the control center (shore control console or commercially available PLC controller in box 1). The buoyancy of the equipment can be adjusted according to the pressure value. By changing the original horizontal agitation and suction to oblique agitation and suction, the situation where horizontal agitation and suction is difficult to rotate can be changed to oblique agitation and suction that can rotate. This provides a certain response time for the float 31 to dynamically adjust the buoyancy of the equipment, avoiding the risk of burnout caused by high resistance drive of the first drive motor 22 and the second drive motor 46.

[0045] Example 8: The difference between this example and Example 2 or 3 is that a flexible mesh bag is provided at the connection between the two sets of agitation half shells 441. The flexible mesh bag can be made of commercially available stainless steel mesh, etc.

Claims

1. A buoyancy-unloading type dredging and seepage-promoting device suitable for soft sandy riverbeds, characterized in that, include: The enclosure (1), the drive assembly (2) for driving the equipment forward, the buoyancy assembly (3) for controlling the equipment to float, and the spiral suction assembly (4) for sludge removal. The drive assembly (2) consists of two dragons (21) respectively arranged on one side of the housing (1). The housing (1) is provided with a bracket (5) rotatably connected to the dragons (21), and the bracket (5) is provided with a first drive motor (22) for driving the dragons (21) to rotate. The buoyancy assembly (3) consists of two floats (31) respectively set on one side of the box (1), and the floats (31) are mounted on the support (5) located above the box (1); The spiral agitator assembly (4) includes a spiral agitator (41) located on the front side of the housing (1) and a suction pump (42) located on the rear side of the housing (1). The mud outlet of the spiral agitator (41) is connected to the inlet of the suction pump (42) through a hose (43), and the outlet of the suction pump (42) is connected to the outside through a pipe.

2. The buoyancy-unloading dredging and seepage-promoting device suitable for soft sandy riverbeds according to claim 1, characterized in that, The front end of the jiaolong (21) is provided with a first protective cover (23) for guiding the flow, and the output shaft of the first drive motor (22) is connected to the rear end of the jiaolong (21).

3. The buoyancy-unloading dredging and seepage-promoting device suitable for soft sandy riverbeds according to claim 2, characterized in that, The front end of the jiaolong (21) is provided with a first protective cover (23) for guiding the flow, and the rear end of the jiaolong (21) is provided with a second protective cover (24) for protecting the first drive motor (22).

4. The buoyancy-unloading dredging and seepage-promoting device suitable for soft sandy riverbeds according to claim 1, characterized in that, The float (31) has a water inlet (32), which is connected to a submersible pump installed on the support (5) via a pipe. The submersible pump is equipped with a switch valve for controlling the water supply to and from the float.

5. A buoyancy-unloading type dredging and seepage-promoting device suitable for soft sandy riverbeds according to claim 1, characterized in that, The spiral agitator (41) includes an agitator housing (44), a spiral roller brush (45) rotatably disposed within the agitator housing (44) along the axial direction of the agitator housing (44), and a second drive motor (46) disposed on one side of the agitator housing (44) for driving the spiral roller brush (45) to rotate. The agitator housing (44) is hinged to the box body (1) via two sets of connecting arms (47), and the box body (1) is hinged with a hydraulic cylinder (48) for driving the agitator housing (44) to lift. The hydraulic cylinder (48) and the connecting arms (47) are arranged in a one-to-one correspondence. The mud outlet is located at the rear end of the agitator housing (44).

6. A buoyancy-unloading type dredging and seepage-promoting device suitable for soft sandy riverbeds according to claim 5, characterized in that, Two sets of connecting arms (47) are connected to the agitator housing (44) through the carrier (6). The agitator housing (44) is composed of two sets of agitator half-shells (441). Each agitator half-shell (441) is hinged to the inner wall of the carrier (6) through at least one set of hinge assembly (49). The hinge assembly (49) includes a torsion spring shaft (491) for hinged to the two sets of agitator half-shells (441) and a connecting seat (492) respectively provided on the carrier (6) and the agitator half-shells (441). Several magnetic blocks for alignment are embedded on the opposite side of the two sets of agitator half-shells (441). The spiral roller brush (45) consists of two sets of spiral half rollers (451), each spiral half roller (451) including a shaft (452) and a spiral blade (453) disposed on the shaft (452).

7. A buoyancy-unloading type dredging and seepage-promoting device suitable for soft sandy riverbeds according to claim 6, characterized in that, The second drive motor (46) is provided in two sets, which are respectively located on the inner wall of the agitation half shell (441) on one side. The output end of the second drive motor (46) is connected to one end of the shaft (452) of the spiral half roller (451), and the other end of the shaft (452) is rotatably connected to the support plate (442) mounted in the agitation half shell (441). A gap is left between the two support plates (442) to allow the agitation half shells (441) on both sides to deflect inward.

8. A buoyancy-unloading type dredging and seepage-promoting device suitable for soft sandy riverbeds according to claim 6, characterized in that, The second drive motor (46) is provided in a set and is located on the inner wall of the agitator half shell (441) on any side. The output end of the second drive motor (46) is connected to one end of the shaft (452) of the spiral half roller (451), and the other ends of the two shafts (452) are connected by a coupling (7). The coupling (7) comprises a cylindrical shell (71), an annular flange (72) integrally formed with the cylindrical shell (71) on both end faces of the cylindrical shell (71), and hemispherical heads (73) located on both sides of the cylindrical shell (71) and rotatably connected to the corresponding annular flange (72); the annular flange (72) has a plurality of balls (74) evenly spaced on its inner circumference, and the annular flange (72) has a protruding edge (75) for limiting and fitting the hemispherical head (73) on its outer edge; the hemispherical head (73) has a plurality of ball grooves (76) corresponding one-to-one with the balls (74), and the ball grooves (76) are used to engage with the balls (74) when the hemispherical head (73) swings in any direction; the hemispherical head (73) is provided with a spline shaft that is splinedly connected to the shaft (452).

9. A buoyancy-unloading type dredging and seepage-promoting device suitable for soft sandy riverbeds according to claim 8, characterized in that, The spiral blade (453) is composed of a fixed spiral blade (454) and a movable spiral blade (455). The length ratio of the fixed spiral blade (454) and the movable spiral blade (455) on the shaft (452) is 6-8:2-4. The movable spiral blade (455) is located at the other end of the shaft (452) and is slidably connected to the shaft (452). The end of the movable spiral blade (455) is provided with a steel rope. The steel rope passes through the inside of the shaft (452), is connected to the guide wheel of the shaft (452), and is then fixedly connected to the carrier (6). It is used to move and compress the movable spiral blade (455) by stretching the steel rope.

10. A buoyancy-unloading type dredging and seepage-promoting device suitable for soft sandy riverbeds according to claim 6, characterized in that, The inner wall of the container (6) is provided with a spring rod for detecting the water / mud resistance of the agitator half shell (441). The contact end of the spring rod with the agitator half shell (441) is provided with a pressure sensor. A flexible net bag is provided at the connection between the two sets of agitator half shells (441).

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