Dredging device

Abstract

Relates to the field of sludge treatment, and discloses a desilting device which comprises a ship body and a collecting bin arranged on the ship body and used for collecting sludge, and further comprises a sampling device adjustably arranged on one side of the ship body and used for sampling the sludge; the filtering device is arranged on one side, close to the discharging end of the sampling device, of the ship body and is used for filtering impurities in the sludge; the power device is arranged at the upper end of the ship body, connected with the sampling device and the filtering device and used for driving the sampling device and the filtering device to move, sludge at different positions can be conveniently taken out, the sampling process is more flexible and efficient, the working efficiency of river channel dredging is greatly improved, and the working efficiency of river channel dredging is improved. The filtering device can effectively separate and filter impurities in the sludge, so that not only is the filtering efficiency improved, but also the quality of the filtered sludge is ensured, and convenience is provided for subsequent sludge extrusion and dehydration work.

Description

Technical Field

[0001] The invention relates to the technical field of sludge treatment, in particular to a silt clearing device. Background Art

[0002] In aquatic environments, the accumulation of silt not only affects water quality, but may also cause damage to underwater facilities, so dredging is particularly important. Traditional dredging methods often rely on manual operations, which are not only inefficient, but also have a harsh working environment and pose a threat to the health and safety of operators. With the development of science and technology, mechanized and automated dredging devices have gradually become mainstream.

[0003] The existing equipment has the following disadvantages: the installation position of the existing sludge extraction device is generally fixed, and the position of the sampling device cannot be adjusted according to the depth of the sludge, which affects the sampling efficiency of the sludge, and is not convenient for separating the stones and impurities mixed in the sludge, which is not convenient for the subsequent dehydration of the sludge, limiting the sludge treatment efficiency.

[0004] Therefore, the present application now proposes a dredging device to solve the above-mentioned problems. Summary of the invention

[0005] The object of the present invention is to provide a dredging device to solve the problem that the position of the sampling device cannot be adjusted according to the depth of the silt, thereby affecting the sampling efficiency of the silt, and it is not convenient to separate the stones and impurities mixed in the silt, thereby making it difficult to dehydrate the subsequent silt.

[0006] To achieve the above object, the present invention provides the following technical solution: a dredging device, comprising a hull and a collecting bin arranged on the hull for collecting silt, and further comprising:

[0007] A sampling device, adjustably arranged on one side of the hull, for sampling sludge;

[0008] A filtering device, arranged on one side of the hull close to the discharge end of the sampling device, for filtering impurities in the sludge;

[0009] A power device is arranged at the upper end of the hull and is connected to the sampling device and the filtering device, and is used for driving the sampling device and the filtering device to move.

[0010] A first side plate is fixed on the hull, a mounting frame for mounting the filtering device is disposed at the upper end of the first side plate, and a rotating rod for mounting the sampling device is disposed on the mounting frame.

[0011] Wherein, the sampling device includes a mounting rod fixed between the two rotating rods, a side frame rotatably connected to both sides of the mounting rod, an insertion roller arranged on the side of the side frame away from the mounting rod, and a conveyor belt sleeved on the mounting rod and the insertion roller, the conveyor belt is connected to the power device on the side close to the mounting rod, a first power member is arranged between the first side plate and the side frame, partitions are arranged on the conveyor belt at intervals, a material guide plate is arranged at the upper end of the first side plate below the conveyor belt, and the material guide plate is arranged obliquely above the filtering device.

[0012] Among them, the power device includes a motor fixed on the first side plate, a rotating shaft arranged at the power output end of the motor and passing through the mounting frame, a first transmission member arranged on the rotating shaft and connected to the conveyor belt, and a second transmission member arranged on the rotating shaft and connected to the filtering device.

[0013] Wherein, the second transmission member includes a main gear fixed on the rotating shaft, a connecting roller rotatably sleeved on the upper end of the mounting rod, and a slave gear fixedly sleeved on the connecting roller and meshingly connected with the main gear, and the conveyor belt is sleeved on the connecting roller.

[0014] Wherein, the first transmission member includes a driving bevel gear fixed on the rotating shaft, a connecting shaft rotatably arranged on the mounting frame, and a driven bevel gear sleeved on the connecting shaft and meshingly connected with the driving bevel gear, and the connecting shaft is connected to the filtering device.

[0015] Wherein, the filtering device includes a support rod fixed on the mounting frame, a gear shaft sleeved on the support rod and a filter belt sleeved on two groups of the gear shafts, the gear shaft is fixedly sleeved on the connecting shaft, a second side plate is arranged on one side of the lower end of the mounting frame, the height of the second side plate is higher than the height of the first side plate, the filter belt is arranged obliquely, and a first filter hole is opened on the filter belt.

[0016] Among them, a second filter hole is opened on the inner side of the filter belt, the mesh diameter of the second filter hole is smaller than the mesh diameter of the first filter hole, a first collection frame is arranged on the side of the installation frame close to the second side plate, and a second collection frame is arranged on the side of the installation frame close to the first side plate.

[0017] Wherein, a toothed belt is arranged at a position of the filter belt corresponding to the gear shaft, and a stop bar is arranged at a position of the filter belt located outside the toothed belt.

[0018] A second power member is arranged inside the side of the support rod close to the first side plate, and a scraper for cleaning impurities on the filter belt can be adjusted at the lower end of the second power member, and the second power member is inclined toward the side close to the collection bin.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The present invention filters stones and impurities in the silt through a filtering device, and then the filtered silt flows into the interior of a collecting bin. By arranging an adjustable sampling device, the silt at different positions can be conveniently taken out, making the sampling process more flexible and efficient, and greatly improving the efficiency of river dredging. The filtering device can effectively separate and filter impurities in the silt, which not only improves the filtering efficiency, but also ensures the quality of the filtered silt, and provides convenience for subsequent silt extrusion and dehydration work. The power device efficiently transmits power to the sampling device and the filtering device through a clever transmission design, thereby realizing the coordinated work of the two, which not only improves the dredging efficiency, but also reduces energy consumption, making the entire dredging process more economical and environmentally friendly. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the main structure in one embodiment of the present invention;

[0022] Figure 2 It is a schematic diagram of a top view of a structure in one embodiment of the present invention;

[0023] Figure 3 It is a schematic diagram of a cross-section structure in one embodiment of the present invention;

[0024] Figure 4 It is a structural schematic diagram of an embodiment of the present invention in a front view;

[0025] Figure 5 It is a schematic diagram of the structure of the rear view in one embodiment of the present invention;

[0026] Figure 6 It is a structural schematic diagram of a power device in one embodiment of the present invention;

[0027] Figure 7 It is a schematic diagram of the structure of the first transmission member and the second transmission member in one embodiment of the present invention;

[0028] Figure 8 It is a schematic structural diagram of a second transmission member in one embodiment of the present invention;

[0029] Fig. 9 It is a structural schematic diagram of the connection between the drain plate and the first side plate in one embodiment of the present invention;

[0030] Fig.10It is a schematic structural diagram of a drain plate in one embodiment of the present invention;

[0031] Fig.11 This is a schematic diagram of the structure of a filtering device in one embodiment of the present invention;

[0032] Fig.12 It is a schematic diagram of the structure of a scraper in one embodiment of the present invention;

[0033] Fig.13 This is a structural schematic diagram of the filter belt setting position in one embodiment of the present invention;

[0034] Fig.14 It is a schematic structural diagram of a cross-section of a filtering device in one embodiment of the present invention.

[0035] In the figure: 1, hull; 11, first side plate; 111, second side plate; 12, mounting frame; 13, rotating rod; 2, sampling device; 21, mounting rod; 22, conveyor belt; 221, partition; 23, side frame; 24, first power member; 25, guide plate; 26, insert roller; 3, filtering device; 31, gear shaft; 311, support rod; 32, filtering belt; 321, stop bar; 322, toothed belt; 33, first A filter hole; 331, a second filter hole; 34, a second power member; 341, a scraper; 35, a drain plate; 351, a limit strip; 352, a separation block; 36, a first collection frame; 37, a second collection frame; 4, a collection bin; 5, a power device; 51, a motor; 52, a rotating shaft; 53, a driving bevel gear; 54, a driven bevel gear; 55, a main gear; 56, a slave gear; 57, a connecting shaft; 58, a connecting roller. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] See also Figure 1-14 The present invention provides a technical solution: a dredging device, comprising a hull 1 and a collecting bin 4 for collecting sludge arranged on the hull 1, and further comprising:

[0038] A sampling device 2, adjustably arranged on one side of the hull 1, for sampling sludge;

[0039] The filtering device 3 is arranged on one side of the hull 1 close to the discharge end of the sampling device 2 and is used to filter impurities in the sludge;

[0040] The power device 5 is arranged at the upper end of the hull 1 and is connected to the sampling device 2 and the filtering device 3, and is used for driving the sampling device 2 and the filtering device 3 to move.

[0041] It should be noted that, when working, the hull 1 is placed in the river channel to be cleaned, and then the power parts on the hull 1 are driven to drive the hull 1 to move inside the river channel, and then the sampling device 2 is inserted into the silt, and then the power device 5 is started to drive the sampling device 2 to move, so that the sampling device 2 takes the silt from the bottom of the river channel, and then transports it to the filtering device 3, and the stones and impurities in the silt are filtered by the filtering device 3, and then the filtered silt flows into the interior of the collecting bin 4. By setting an adjustable sampling device 2, the silt at different positions can be conveniently taken out, making the sampling process more flexible and efficient, and greatly improving the efficiency of river channel dredging. The filtering device 3 can effectively separate and filter the impurities in the silt, which not only improves the filtering efficiency, but also ensures the quality of the filtered silt, which provides convenience for the subsequent silt extrusion and dehydration work. The power device 5 efficiently transmits power to the sampling device 2 and the filtering device 3 through a clever transmission design, realizing the coordinated work of the two, which not only improves the dredging efficiency, but also reduces energy consumption, making the entire dredging process more economical and environmentally friendly.

[0042] In one embodiment, a first side plate 11 is fixed to the hull 1 , a mounting frame 12 for mounting the filtering device 3 is disposed at the upper end of the first side plate 11 , and a rotating rod 13 for mounting the sampling device 2 is disposed on the mounting frame 12 .

[0043] This design, see Figure 1-9 By fixing the first side plate 11 on the hull 1, a stable supporting foundation is provided for the entire dredging device. The mounting frame 12 is arranged at the upper end of the first side plate 11, providing a special space for the installation of the filtering device 3, so that the filtering device 3 can be conveniently installed at a predetermined position. The rotating rod 13 can provide an installation space for the sampling device 2, and allow the sampling device 2 to be flexibly adjusted in the horizontal or vertical direction to meet the sludge sampling requirements at different depths and positions.

[0044] In one embodiment, the sampling device 2 includes a mounting rod 21 fixed between two rotating rods 13, a side frame 23 rotatably connected to both sides of the mounting rod 21, an insertion roller 26 arranged on the side of the side frame 23 away from the mounting rod 21, and a conveyor belt 22 sleeved on the mounting rod 21 and the insertion roller 26. The side of the conveyor belt 22 close to the mounting rod 21 is connected to the power device 5. A first power member 24 is arranged between the first side plate 11 and the side frame 23. Partitions 221 are arranged on the conveyor belt 22 at intervals. A material guide plate 25 is arranged at the upper end of the first side plate 11 below the conveyor belt 22. The material guide plate 25 is inclined above the filtering device 3. The first power member 24 includes but is not limited to a hydraulic cylinder, a linear guide rail, an electric push rod and a cylinder.

[0045] This design, see Figure 1-4 ,as well as Figure 6 , the first power member 24 drives the side frame 23 to rotate along the mounting rod 21, and then the insertion roller 26 can penetrate into the silt, so that the lower end of the conveyor belt 22 is inserted into the silt. Driven by the power device 5, the conveyor belt 22 starts to rotate, and the conveyor belt 22 continuously and stably transports the silt on the riverbed to the subsequent processing link, which greatly improves the sampling efficiency and accuracy. The partitions 221 arranged at intervals on the conveyor belt 22 can separate the sampled silt to ensure that the silt remains evenly distributed during the transportation process, which is not only conducive to the efficient treatment of the subsequent filtering device 3, but also can avoid the accumulation or scattering of silt during the transportation process, thereby improving the cleanliness and efficiency of the entire dredging process.

[0046] In one embodiment, the power device 5 includes a motor 51 fixed on the first side plate 11, a rotating shaft 52 arranged at the power output end of the motor 51 and passing through the mounting frame 12, a first transmission member arranged on the rotating shaft 52 and connected to the conveyor belt 22, and a second transmission member arranged on the rotating shaft 52 and connected to the filtering device 3.

[0047] This design, see Figure 1-9 The power of the motor 51 is directly transmitted to the first transmission member and the second transmission member through the rotating shaft 52, thereby realizing efficient power transmission. The first transmission member is connected to the conveyor belt 22 and is responsible for driving the movement of the sampling device 2. The second transmission member is connected to the filtering device 3 and is responsible for driving the movement of the filtering device 3, so that the power device 5 can simultaneously meet the requirements of two different functions, namely, sampling and filtering, without interfering with each other.

[0048] In one embodiment, the second transmission member includes a main gear 55 fixed on the rotating shaft 52, a connecting roller 58 rotatably sleeved on the upper end of the mounting rod 21, and a slave gear 56 fixedly sleeved on the connecting roller 58 and meshingly connected to the main gear 55, and the conveyor belt 22 is sleeved on the connecting roller 58.

[0049] This design, see Figure 6-9 The main gear 55 is fixed on the rotating shaft 52 and rotates with the rotating shaft 52. Its stable rotation provides a reliable driving force for the slave gear 56. The slave gear 56 is fixedly mounted on the connecting roller 58 and meshed with the main gear 55, ensuring the stability and accuracy of the transmission from the rotating shaft 52 to the connecting roller 58. This gear transmission method can withstand a large load and is suitable for occasions in dredging equipment where a large torque needs to be transmitted.

[0050] In one embodiment, the first transmission member includes a driving bevel gear 53 fixed on the rotating shaft 52, a connecting shaft 57 rotatably arranged on the mounting frame 12, and a driven bevel gear 54 sleeved on the connecting shaft 57 and meshingly connected with the driving bevel gear 53, and the connecting shaft 57 is connected to the filtering device 3.

[0051] This design, see Figure 6-7 ,as well as Fig. 9 The rotating shaft 52 drives the active bevel gear 53, and the meshing of the active bevel gear 53 and the driven bevel gear 54 drives the connecting shaft 57 to rotate, so that the connecting shaft 57 drives the filtering device 3 to rotate, providing power for the filtering device 3. The meshing design of the active bevel gear 53 and the driven bevel gear 54 ensures the stability and efficiency of the transmission, reduces energy loss, and improves the overall working efficiency of the dredging device.

[0052] In one embodiment, the filtering device 3 includes a support rod 311 fixed on the mounting frame 12, a gear shaft 31 sleeved on the support rod 311, and a filter belt 32 sleeved on two sets of gear shafts 31, the gear shaft 31 is fixedly sleeved on the connecting shaft 57, a second side plate 111 is provided on one side of the lower end of the mounting frame 12, the height of the second side plate 111 is higher than the height of the first side plate 11, the filter belt 32 is inclined, and a first filter hole 33 is opened on the filter belt 32.

[0053] This design, see Figure 11-14 The gear shaft 31 is fixed on the connecting shaft 57 and rotates with the connecting shaft 57, so that the gear shaft 31 drives the filter belt 32 to rotate. The filter belt 32 is provided with a first filter hole 33. The hole allows silt and smaller particles and stones to pass through, while larger impurities or solids will be blocked on the filter belt 32 and move with the rotation of the filter belt 32. When it moves to one side of the conveyor belt 22, it moves out of the filter belt 32, so that the filter device 3 can efficiently separate impurities in the silt. The filter belt 32 is tilted, and the height of the second side plate 111 is higher than that of the first side plate 11. This design allows the filtered material to naturally slide or be discharged to one side of the first side plate 11 with the help of gravity, reducing the risk of blockage and material accumulation, and also facilitating the collection and subsequent treatment of the filtered material.

[0054] In one embodiment, a second filter hole 331 is opened on the inner side of the filter belt 32, and the mesh diameter of the second filter hole 331 is smaller than the mesh diameter of the first filter hole 33. A first collecting frame 36 is provided on the side of the installation frame 12 close to the second side plate 111, and a second collecting frame 37 is provided on the side of the installation frame 12 close to the first side plate 11.

[0055] This design, see Fig.11 By setting the first filter holes 33 and the second filter holes 331 with different mesh diameters, multi-stage filtration is achieved. The first stage filtration can preliminarily remove larger impurities and particles, while the second stage filtration can further intercept smaller impurities. The second filter holes 331 above the gear shaft 31 and the first filter holes 33 below the gear shaft 31 are arranged alternately. The impurities and silt falling from the second filter holes 331 above fall onto the filter belt 32. Then, due to the inclined setting of the filter belt 32, the silt can fall from the second filter holes 331. The impurities slide on the filter belt 32 and then move to one side of the first side plate 11. A small amount of impurities and stones will fall out of the second filter holes 331 during the movement, thereby improving the overall filtration accuracy.

[0056] The filter belt 32 is provided with a first filter hole 33 and a second filter hole 331, so that stones can fall into the first filter hole 33, and the sliding of stones and impurities on the filter belt 32 can be reduced. The filter belt 32 rotates clockwise on the gear shaft 31, and then because the filter belt 32 abuts against the support rod 311, when the filter belt 32 moves to the top of the first collecting frame 36, the impurities accumulated in the first filter hole 33 fall into the inside of the first collecting frame 36, and the second filter hole 331 can allow smaller stones and silt to fall into the inner side of the filter belt 32.

[0057] In one embodiment, a toothed belt 322 is provided at a position of the filter belt 32 corresponding to the gear shaft 31 , and a stop bar 321 is provided at a position of the filter belt 32 located outside the toothed belt 322 .

[0058] This design, see Fig.11 ,as well as Fig.12 The toothed belt 322 matches the tooth shape of the gear shaft 31 and can be tightly engaged with each other, which not only enhances the transmission connection between the filter belt 32 and the gear shaft 31, but also ensures the stability and accuracy of the filter belt 32 during rotation.

[0059] The stop bar 321 is arranged at a position of the filter belt 32 outside the toothed belt 322, which effectively blocks the material from leaking out of the filter belt 32, ensures the continuity and integrity of the filtering process, improves the filtering efficiency, and reduces the waste of material.

[0060] In one embodiment, a second power member 34 is disposed inside the support rod 311 on the side close to the first side plate 11, and a scraper 341 for cleaning impurities on the filter belt 32 can be adjusted at the lower end of the second power member 34, and the second power member 34 is inclined toward the side close to the collection bin 4.

[0061] This design, see Fig.12 ,as well as Fig.14 The second power member 34 includes but is not limited to a hydraulic cylinder, a linear guide rail, an electric push rod and a cylinder, which drives the scraper 341 to move on the filter belt 32, pushes the impurities on the filter belt 32 into the second collecting frame 37, and automatically cleans the impurities and blockages remaining on the inner side of the filter belt 32, reducing the frequency and labor intensity of manual cleaning, improving work efficiency, and ensuring the continuous smooth flow of the filter belt 32. The second power member 34 is inclined to the side close to the collection bin 4, so that when the scraper 341 moves toward the side away from the second collecting frame 37, the distance between the scraper 341 and the filter belt 32 gradually increases, thereby not driving the impurities on the filter belt 32 to move toward the side away from the second collecting frame 37, so that the impurities can only move to the inner side of the second collecting frame 37, thereby improving the collection efficiency of impurities.

[0062] In a specific embodiment, a drain plate 35 is provided at a position of the first side plate 11 and the second side plate 111 below the filter belt 32, and limiting strips 351 are provided on both sides of the upper end of the drain plate 35. Separation blocks 352 are arranged at intervals on the drain plate 35, and the drain plate 35 is inclined toward the side close to the collection bin 4.

[0063] This design, see Fig. 9 ,as well as Fig.10 The drain plate 35 is located below the filter belt 32 and can receive and discharge excess water in the sludge. Through the design of the drain plate 35, efficient dehydration of the sludge can be achieved, the dehydration degree of the sludge can be improved, and subsequent treatment and utilization are convenient. Limiting strips 351 are arranged on both sides of the upper end of the drain plate 35. These limiting strips 351 can effectively block the sludge on the filter belt 32, ensuring that the sludge is collected in a designated area and then falls into the collection bin 4, which is convenient for subsequent cleaning and treatment. Separation blocks 352 are arranged at intervals on the drain plate 35, which can form gaps between the sludge, facilitate the discharge of water from the gaps between the sludge, thereby accelerating the dehydration efficiency of the sludge. The drain plate 35 is inclined to the side close to the collection bin 4. This design allows the water and impurities on the drain plate 35 to flow naturally to the collection bin 4 by gravity, reducing the risk of blockage and accumulation, and also facilitating the collection and subsequent treatment of the drained sludge.

[0064] In addition, if there are descriptions involving "first", "second", etc. in the embodiments, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying the importance of the relative description or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features.

Claims

1. A dredging device, comprising a hull (1) and a collecting bin (4) arranged on the hull (1) for collecting sludge, characterized in that: Also includes: A sampling device (2) is adjustably arranged on one side of the hull (1) and is used for sampling sludge; A filtering device (3) is arranged on one side of the hull (1) close to the discharge end of the sampling device (2) and is used to filter impurities in the sludge; A power device (5) is arranged at the upper end of the hull (1) and is connected to the sampling device (2) and the filtering device (3), and is used to drive the sampling device (2) and the filtering device (3) to move.

2. A dredging device according to claim 1, characterized in that: A first side plate (11) is fixed to the hull (1), a mounting frame (12) for mounting the filtering device (3) is provided at the upper end of the first side plate (11), and a rotating rod (13) for mounting the sampling device (2) is provided on the mounting frame (12).

3. A dredging device according to claim 2, characterized in that: The sampling device (2) comprises a mounting rod (21) fixed between the two rotating rods (13), a side frame (23) rotatably connected to both sides of the mounting rod (21), an insertion roller (26) arranged on the side of the side frame (23) away from the mounting rod (21), and a conveyor belt (22) sleeved on the mounting rod (21) and the insertion roller (26), the conveyor belt (22) being connected to the power device (5) on the side close to the mounting rod (21), a first power member (24) being arranged between the first side plate (11) and the side frame (23), a partition plate (221) being arranged on the conveyor belt (22), a material guide plate (25) being arranged at a position below the conveyor belt (22) at the upper end of the first side plate (11), and the material guide plate (25) being arranged obliquely above the filtering device (3).

4. A dredging device according to claim 3, characterized in that: The power device (5) comprises a motor (51) fixed on the first side plate (11), a rotating shaft (52) arranged at the power output end of the motor (51) and passing through the mounting frame (12), a first transmission member arranged on the rotating shaft (52) and connected to the conveyor belt (22), and a second transmission member arranged on the rotating shaft (52) and connected to the filtering device (3).

5. A dredging device according to claim 4, characterized in that: The second transmission member comprises a main gear (55) fixed on the rotating shaft (52), a connecting roller (58) rotatably sleeved on the upper end of the mounting rod (21), and a slave gear (56) fixedly sleeved on the connecting roller (58) and meshingly connected to the main gear (55), and the conveyor belt (22) is sleeved on the connecting roller (58).

6. A dredging device according to claim 4, characterized in that: The first transmission member comprises a driving bevel gear (53) fixed on the rotating shaft (52), a connecting shaft (57) rotatably arranged on the mounting frame (12), and a driven bevel gear (54) sleeved on the connecting shaft (57) and meshingly connected with the driving bevel gear (53), wherein the connecting shaft (57) is connected to the filtering device (3).

7. A dredging device according to claim 6, characterized in that: The filtering device (3) comprises a support rod (311) fixed on the mounting frame (12), a gear shaft (31) sleeved on the support rod (311), and a filtering belt (32) sleeved on two groups of the gear shafts (31); the gear shaft (31) is fixedly sleeved on the connecting shaft (57); a second side plate (111) is provided on one side of the lower end of the mounting frame (12); the height of the second side plate (111) is higher than the height of the first side plate (11); the filtering belt (32) is inclined; and a first filtering hole (33) is provided on the filtering belt (32).

8. A dredging device according to claim 7, characterized in that: A second filter hole (331) is provided on the inner side of the filter belt (32); the mesh diameter of the second filter hole (331) is smaller than the mesh diameter of the first filter hole (33); a first collecting frame (36) is provided on the side of the installation frame (12) close to the second side plate (111); and a second collecting frame (37) is provided on the side of the installation frame (12) close to the first side plate (11).

9. A dredging device according to claim 8, characterized in that: A toothed belt (322) is provided at a position of the filter belt (32) corresponding to the gear shaft (31), and a gear bar (321) is provided at a position of the filter belt (32) located outside the toothed belt (322).

10. A dredging device according to claim 7, characterized in that: A second power member (34) is provided inside the support rod (311) on a side close to the first side plate (11); a scraper (341) for cleaning impurities on the filter belt (32) is adjustably provided at the lower end of the second power member (34); and the second power member (34) is inclined toward a side close to the collection bin (4).

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