A river dredging device based on water conservancy projects

Abstract

The present invention relates to the technical field of river dredging, and specifically relates to a river dredging device based on a water conservancy project; it includes an inclined pipe and a branch pipe on the outer wall of the upper end of the inclined pipe; the branch pipe is connected to a driving device through a sludge pump; the lower end of the inclined pipe is horizontally and vertically connected to a horizontal pipe; rolling sleeves are provided at both ends of the horizontal pipe; end covers are connected to both ends of the rolling sleeves; the end of the horizontal pipe passes through the end cover and extends to the inner side of the rolling sleeve, and the end of the horizontal pipe is rotationally and sealingly connected to the end covers on both sides; partition plates are evenly fixed on the outer wall of the rolling sleeve; a plurality of the partition plates are in contact with the end covers on both sides and form a dredging cavity with the end covers on both sides; in the present invention, as the dredging device rolls on the river bottom along with the driving device, a plurality of dredging cavities on the dredging device cover the river bottom silt in sequence during rolling, so that the silt at the river bottom is not easily lost and is more easily pumped away after being stirred, improving the effect of river silt cleaning.

Description

Technical Field

[0001] The present invention relates to the technical field of river dredging, and specifically relates to a river dredging device based on a water conservancy project. Background Art

[0002] River dredging is crucial in the field of water conservancy projects, aiming to clean the silt formed by the deposition of soil and other substances carried by the water flow at the bottom of the river. With the accumulation of time, a large amount of silt accumulates, not only increasing the riverbed height, hindering the river from transporting and regulating water resources, but also accelerating the deterioration of water quality and having many negative impacts on the surrounding ecological environment.

[0003] There are various existing dredging methods and problems. The common method of stirring and mixing the silt to make it flow away with the water flow is simple to operate, but the silt is prone to secondary deposition and will also cause large - area turbidity and pollution of water resources. The method of directly pumping the silt through a sludge pump and other pipelines is difficult because the silt is tightly solidified due to long - term deposition in the river. If the method of first stirring and mixing and then pumping away is used, the sludge will flow away due to the river flow, making it difficult to concentrate the sludge for pumping away.

[0004] In addition, a river dredging device with a publication number of CN216552159U is retrieved. The opening of the dredging box faces the moving direction of the dredging ship. When the dredging ship moves, the sludge is shoveled into the box, preliminarily crushed and then pumped away by a sludge pump, which can better clean the river sludge. However, the opening of the dredging box in this device is exposed, and it cannot avoid the problem that the sludge flows away with the water flow during the stirring process. In addition, due to the tight solidification of the river silt, the way of the dredging device sliding and shoveling the sludge at the bottom of the riverbed will bring greater resistance to the movement of the sludge ship, affecting the dredging efficiency, and consuming a large amount of energy, and it is not energy - saving enough. Summary of the Invention

[0005] In order to make up for the deficiencies of the prior art, the present invention proposes a river dredging device based on a water conservancy project. The present invention makes the dredging device roll on the river bottom along with the driving device, so that multiple dredging chambers on the dredging device successively cover the river bottom silt under rolling, so that the silt at the river bottom is not easy to flow away and is easier to pump away after being stirred, improving the effect of river silt cleaning.

[0006] The technical solution adopted by the present invention to solve its technical problems is as follows: A river dredging device based on a water conservancy project described in the present invention includes an inclined pipe and a branch pipe on the outer wall of the upper end of the inclined pipe; the branch pipe is connected to a driving device through a sludge pump; the lower end of the inclined pipe is horizontally and perpendicularly connected to a horizontal pipe; rolling sleeves are provided at both ends of the horizontal pipe; end covers are connected to both ends of the rolling sleeves; the end of the horizontal pipe passes through the end cover and extends to the inner side of the rolling sleeve, and the end of the horizontal pipe is rotationally and sealingly connected to the end covers on both sides; partition plates are uniformly fixed on the outer wall of the rolling sleeve; a plurality of the partition plates are in contact with the end covers on both sides and form a dredging cavity with the end covers on both sides; the dredging cavity is communicated with a collection cavity inside the rolling sleeve through a collection hole; a driving disturbance member is provided in the dredging cavity.

[0007] Preferably, a middle shell is fixed on the outer side of the lower end of the inclined pipe; outer shells are fixed on both sides of the middle shell; the end of the horizontal pipe passes through the middle shell and the outer shell; the inclined pipe axially passes through and is rotationally connected to an inclined shaft; the upper end of the inclined shaft is driven by a motor, and the lower end passes through the horizontal pipe and is fixed with a worm; a worm gear meshing with the worm is rotationally connected to the inner wall of the middle shell; an outer gear is rotationally connected to the inner side of the outer shell; the outer gear is connected to the center of the worm gear inside the middle shell through a transmission rod; the end cover at the end of the horizontal pipe is rotationally and sealingly connected to the outer shell; driven rods penetrate and are rotationally connected to both sides of the end cover close to the outer shell; a driven gear is fixed at one end of the driven rod inside the outer shell; the driven gear meshes with or disengages from the outer gear after the end cover rotates; a disturbance member is fixed at one end of the driven rod in the dredging cavity; the outer gear is located directly below the horizontal pipe.

[0008] Preferably, an arc-shaped shielding seat is fixed on the front side in the moving direction of the outer shell; a mud-breaking knife is fixed at the lower position of the shielding seat.

[0009] Preferably, the number of teeth of the outer gear is greater than the number of teeth of the driven gear.

[0010] Preferably, the shape of the disturbance member is a spiral plate shape; the collection hole is arranged close to the inclined pipe; a spiral conveyor plate is arranged inside the inclined pipe; the spiral conveyor plate is fixed on the outer wall of the inclined shaft.

[0011] Preferably, a rotating cylinder is rotationally and sealingly connected inside the collection cavity; the opening of the rotating cylinder faces the horizontal pipe; the end of the horizontal pipe extends to the inner side of the rotating cylinder; communication holes are arranged through the inner and outer walls of the rotating cylinder; an arc-shaped hollow cavity is arranged inside the rotating cylinder; the hollow cavity is arranged away from the communication hole; the communication hole is communicated with the collection hole directly below.

[0012] Preferably, the end cap close to the inclined tube is fixedly connected to the rolling sleeve, and the end cap far from the inclined tube is movably connected to the rolling sleeve; a first extension groove is provided on the side of the rolling sleeve far from the inclined tube; an extension sleeve is slidably connected in the first extension groove; a second extension groove communicating with the first extension groove is provided on the side of the partition far from the inclined tube; an extension plate fixedly connected to the extension sleeve is slidably connected in the second extension groove; the end cap far from the inclined tube is fixedly connected to the extension sleeve and the extension plate; the disturbing member is elastic.

[0013] Preferably, the outer surface of the end cap far from the inclined tube is rotatably and sealingly connected to a rotating groove; a rotating ring is rotatably and sealingly connected in the rotating groove; the bottom of the rotating groove is communicated with the inside of the first extension groove through a first air hole; the first extension groove is slidably and sealingly connected to the extension sleeve; the second extension groove is slidably and sealingly connected to the extension plate; second air holes are provided through both end faces of the rotating ring; an arc-shaped cavity is provided inside the rotating ring; the arc-shaped cavity is close to the second air holes.

[0014] Preferably, an L-shaped groove is provided on the side of the rotating ring far from the inclined tube; the L-shaped groove communicates with the second air holes and an L-shaped block is slidably and sealingly connected inside; the L-shaped block penetrates through and is threadedly connected to a bolt.

[0015] The beneficial effects of the present invention are as follows:

[0016] 1. By rolling on the river bottom with the driving device, the dredging device of the present invention enables multiple dredging cavities on the dredging device to successively cover the river bottom sludge under rolling, so that the sludge at the river bottom is not easily lost and is more easily pumped away after being stirred, improving the dredging effect of river channel sludge.

[0017] 2. Only the disturbing members in the dredging cavities that cover the river bottom sludge will rotate and work. On the one hand, the load on the motor is reduced to achieve the purpose of energy saving. On the other hand, the disturbance of the river around the dredging device is reduced to ensure the stability of the sludge at the river bottom before cleaning.

[0018] 3. The collection holes in the dredging cavities at other positions are blocked by the outer wall of the rotating cylinder. In this way, when a new dredging cavity covers the river bottom sludge each time, the collection holes in the dredging cavity will open, and they are in a closed state in other states. On the one hand, this makes the suction of the sludge by the collection cavity more concentrated, improving the suction effect. On the other hand, it avoids the opening of other collection holes far from the river bottom and the suction of excess river water, improving the dredging effect of river channel sludge. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below in conjunction with the drawings and embodiments.

[0020] Figure 1 is a three-dimensional view of the present invention;

[0021] Figure 2 is a position diagram of the middle shell in the present invention;

[0022] Figure 3 is the three-dimensional view of multiple dredging chambers in the present invention;

[0023] Figure 4 is the cross-sectional view of the spiral conveying plate in the present invention;

[0024] Figure 5 is the meshing state diagram of the driven gear and the external gear in the present invention;

[0025] Figure 6 is the schematic diagram of the meshing of the worm and the worm wheel in the present invention;

[0026] Figure 7 is the three-dimensional view of the rotating ring in the present invention;

[0027] Figure 8 is the cross-sectional view of the present invention;

[0028] Figure 9 is Figure 8 the enlarged view of part A in

[0029] In the figure: inclined pipe 1, branch pipe 11, horizontal pipe 12, middle shell 13, outer shell 14, shielding seat 15, mud-breaking knife 16, rotating groove 17, rolling sleeve 2, collecting chamber 21, first extension groove 22, extension sleeve 23, end cover 3, partition plate 4, collecting hole 41, second extension groove 42, dredging chamber 43, extension plate 44, first air hole 441, inclined shaft 5, motor 51, worm 52, worm wheel 53, external gear 54, transmission rod 55, driven rod 56, driven gear 57, disturbing part 58, spiral conveying plate 59, rotating cylinder 6, communication hole 61, hollow cavity 62, rotating ring 7, second air hole 71, arc-shaped cavity 72, L-shaped groove 73, L-shaped block 74, bolt 75. Detailed Embodiments

[0030] In order to make the technical means, creative features, achieved purposes and functions of the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0031] As Figures 1 to 9 shown, the present invention includes the following embodiments:

[0032] Embodiment 1: A river dredging device based on a water conservancy project, including an inclined pipe 1 and a branch pipe 11 on the outer wall of the upper end of the inclined pipe 1; the branch pipe 11 is connected to a driving device (not shown in the figure) through a sludge pump (not shown in the figure); the lower end of the inclined pipe 1 is horizontally and vertically connected to a horizontal pipe 12; rolling sleeves 2 are provided at both ends of the horizontal pipe 12; end caps 3 are connected to both ends of the rolling sleeves 2; the end of the horizontal pipe 12 passes through the end cap 3 and extends to the inside of the rolling sleeve 2, and the end of the horizontal pipe 12 is rotationally and sealingly connected to the end caps 3 on both sides; the outer wall of the rolling sleeve 2 is uniformly fixed with partition plates 4; a plurality of the partition plates 4 are in contact with the end caps 3 on both sides and form a dredging cavity 43 with the end caps 3 on both sides; the dredging cavity 43 is communicated with a collection cavity 21 inside the rolling sleeve 2 through a collection hole 41; a drivable disturbance member 58 is provided in the dredging cavity 43.

[0033] Before dredging, first connect the branch pipe 11 to the driving device, such as the tail of a sludge boat; the branch pipe 11 is communicated with the sludge pump on the driving device. When the sludge pump works, a suction force will be formed inside the branch pipe 11. During the driving process of the driving device, the dredging device will be dragged to roll behind. After the dredging device rolls to the river bottom, the dredging device will roll along the river bottom of the river channel with the driving device. After the inclined pipe 1 in the dredging device is dragged by the branch pipe 11, it will drive the horizontal pipe 12 to move. The end of the horizontal pipe 12 passes through the end cover 3 and enters the collection chamber 21. In this way, when the horizontal pipe 12 is dragged to move, it will drive the end cover 3 at the end to roll on the river bottom. The end cover 3 will drive the rolling sleeve 2 and the multiple partition plates 4 on the outer wall of the rolling sleeve 2 to roll on the river bottom. The end cover 3 and the partition plates 4 at the lower position will be inserted into the river bottom sludge during the rolling process. The multiple dredging chambers 43 on the outer wall of the rolling sleeve 2 will successively cover the river bottom sludge as the end cover 3 rolls. The sludge covered by the dredging chamber 43 will be stirred and dispersed by the rotation of the disturbing member 58 in the dredging chamber 43. The dispersed sludge will flow into the collection chamber 21 through the collection holes 41 under the action of negative pressure. The sludge in the collection chamber 21 will flow into the inclined pipe 1 along the horizontal pipe 12 and finally flow into the branch pipe 11 along the inclined pipe 1. The sludge in the branch pipe 11 is discharged into the sludge boat (not shown in the figure) through the sludge pump (not shown in the figure) for further treatment; after the sludge in the lowermost dredging chamber 43 is pumped away, the driving device moves forward by the length of one dredging chamber 43 again and stops. The next dredging chamber 43 will cover the next part of the river bottom sludge. The sludge covered by the dredging chamber 43 will be stirred by the corresponding disturbing member 58, and a new round of sludge suction will be carried out; so on and so forth. Since the river bottom sludge is stirred and mixed when it is covered, on the one hand, the sludge can be easily pumped away after being loosened, and on the other hand, because the dredging chamber 43 is closed, the sludge is not easy to flow away with the water during the stirring process, thus effectively improving the sludge dredging effect; in this embodiment, the dredging device rolls on the river bottom with the driving device, so that the multiple dredging chambers 43 on the dredging device successively cover and stir the river bottom sludge, so that the river bottom sludge is not easy to lose and is easier to pump away after being stirred and dispersed, improving the river channel sludge dredging effect. In addition, because the dredging device is rolling, compared with the way of sliding and shoveling on the river bottom, the resistance is smaller and it is more energy-saving.

[0034] Embodiment 2: The lower outer side of the inclined tube 1 is fixedly connected to the middle shell 13; both sides of the middle shell 13 are fixedly connected to the outer shell 14; the end of the horizontal tube 12 passes through the middle shell 13 and the outer shell 14; the inclined tube 1 axially passes through and is rotatably connected to the inclined shaft 5; the upper end of the inclined shaft 5 is driven by a motor 51, and the lower end passes through the horizontal tube 12 and is fixedly connected to a worm 52; the inner wall of the middle shell 13 is rotatably connected to a worm gear 53 meshing with the worm 52; the inner side of the outer shell 14 is rotatably connected to an outer gear 54; the outer gear 54 is connected to the center of the worm gear 53 inside the middle shell 13 through a transmission rod 55; the transmission rod 55 is rotatably and sealingly connected to the outer shell 14; the end cover 3 at the end of the horizontal tube 12 is rotatably and sealingly connected to the outer shell 14; both sides of the end cover 3 close to the outer shell 14 penetrate and are rotatably connected to a driven rod 56; one end of the driven rod 56 located inside the outer shell 14 is fixedly connected to a driven gear 57; the driven gear 57 meshes with or disengages from the outer gear 54 after the end cover 3 rotates; one end of the driven rod 56 located in the dredging chamber 43 is fixedly connected to a disturbing member 58; the outer gear 54 is located directly below the horizontal tube 12.

[0035] In this embodiment, an arc-shaped shielding seat 15 is fixedly connected to the front side of the moving direction of the outer shell 14; a mud-breaking knife 16 is fixedly connected to the lower position of the shielding seat 15.

[0036] In this embodiment, the number of teeth of the outer gear 54 is greater than the number of teeth of the driven gear 57.

[0037] One of the implementation manners in which the disturbing member 58 is driven is to be independently driven by an independent motor. Another is the driving manner of this embodiment. The outer wall of the motor 51 is fixedly connected to the upper end of the inclined pipe 1. During the rotation of the motor 51, the inclined shaft 5 will be driven to rotate. During the rotation of the inclined shaft 5, the worm 52 will be driven to rotate. During the rotation of the worm 52 (simplified representation in the figure), the engaged worm gear 53 (simplified representation in the figure) will be driven to rotate. During the rotation of the worm gear 53, the transmission rod 55 (simplified representation in the figure) will be driven to rotate. During the rotation of the transmission rod 55, the external gear 54 will be driven to rotate. During the process of the dredging device being dragged and rolling on the river bottom, during the rotation of the end covers 3 at both ends of the horizontal pipe 12, a plurality of driven rods 56 will be driven to rotate synchronously. The plurality of driven rods 56 will drive the respective connected driven gears 57 to rotate around the center of the end cover 3. When the dredging cavity 43 covers the river bottom sludge, the driven rod 56 will drive the driven gear 57 to move directly below the external gear 54 and re-engage with the external gear 54, while the other driven gears 57 do not contact the external gear 54 and remain separated from the external gear 54. At the moment when the driven gear 57 contacts the external gear 54, the external gear 54 can also reduce its speed to ensure smooth meshing. During the rotation of the external gear 54 driven by the transmission of the worm gear 53, the disturbing member 58 will be driven to rotate. The disturbing members 58 in other dredging cavities 43 cannot rotate when the corresponding driven gears 57 are not engaged with the external gear 54. In this way, only the disturbing member 58 in the dredging cavity 43 that covers the river bottom sludge will rotate and work. On the one hand, the load on the motor 51 is reduced, achieving the purpose of energy conservation. On the other hand, the disturbance of the river around the dredging device is reduced, ensuring the stability of the sludge on the river bottom before cleaning; during the process of the dredging device rolling on the river bottom along with the driving equipment, the originally lowermost driven gear 57 that is engaged with the external gear 54 will disengage from the external gear 54 and move upward, and the new driven gear 57 will move directly below the external gear 54 and engage with the external gear 54, and so on; it should be noted that each time the river bottom sludge is covered by the dredging cavity 43, it will stop rolling for a period of time until the sludge in the dredging cavity 43 is pumped away before the next rolling; since the number of teeth of the external gear 54 is greater than that of the driven gear 57, the driven gear 57 will rotate faster when the external gear 54 rotates. On the one hand, it enables the external gear 54 to drive the driven gear 57 and the disturbing member 58 to rotate at a lower rotational speed, meeting the disturbance requirements of the disturbing member 58. On the other hand, the external gear 54 at a low speed is more likely to contact and engage with the driven gear 57, making the meshing between the external gear 54 and the driven gear 57 more stable; an arc-shaped shielding seat 15 is fixedly connected to the front side of the moving direction of the outer shell 14. The shielding seat 15 will drive the mud-breaking knife 16 to push the sludge on the river bottom away, and the remaining plant roots in the river bottom sludge are also easily cut off to prevent the roots from affecting the operation of the dredging device. The sludge in front of the shielding seat 15 is pushed to the space of the dredging cavities 43 on both sides by the mud-breaking knife 16.

[0038] Embodiment 3: The shape of the disturbing member 58 is a spiral plate shape; the collecting hole 41 is arranged close to the inclined tube 1; a spiral conveying plate 59 is arranged inside the inclined tube 1; the spiral conveying plate 59 is fixedly connected to the outer wall of the inclined shaft 5.

[0039] In this embodiment, a rotating drum 6 is rotatably and sealingly connected inside the collecting cavity 21; the opening of the rotating drum 6 faces the horizontal tube 12; the end of the horizontal tube 12 extends to the inside of the rotating drum 6; communication holes 61 are arranged through the inner and outer walls of the rotating drum 6; an arc-shaped hollow cavity 62 is arranged inside the rotating drum 6; the hollow cavity 62 is arranged away from the communication holes 61; the communication holes 61 are communicated with the collecting holes 41 directly below.

[0040] During the process of the sludge pump generating negative pressure, negative pressure is generated inside the branch pipe 11, the inclined tube 1 and the horizontal tube 12, so that negative pressure is generated inside the rotating drum 6. The rotating drum 6 is rotatably and sealingly connected in the collecting cavity 21, and due to the arrangement of the internal hollow cavity 62 of the rotating drum 6, the center of gravity of the rotating drum 6 is lower. The hollow cavity 62 is arranged away from the communication holes 61, so the center of gravity of the rotating drum 6 is close to the position of the communication holes 61, so that negative pressure will be generated at the communication holes 61. However, only when the collecting hole 41 is directly below the communication hole 61, the sludge in the dredging cavity 43 will be sucked. The collecting holes 41 in the dredging cavities 43 at other positions are blocked by the outer wall of the rotating drum 6. In this way, every time a new dredging cavity 43 covers the river bottom sludge, the collecting hole 41 in the dredging cavity 43 will be opened, and other states are in a closed state. On the one hand, this makes the suction of the sludge by the collecting cavity 21 more concentrated, improving the suction effect. On the other hand, it avoids the opening of other collecting holes 41 far from the river bottom and sucking in excess river water, improving the effect of river channel sludge cleaning; during the process of the dredging cavity 43 covering the river bottom sludge, the motor 51 will drive the inclined shaft 5 to rotate. During the rotation of the inclined shaft 5, the spiral conveying plate 59 on the outer wall will be driven to rotate. The spiral conveying plate 59 can be understood as the auger in a screw conveyor to improve the sludge conveying effect in the inclined tube 1; the shape of the disturbing member 58 is spiral, so that on the one hand, the disturbing member 58 can disturb the river bottom sludge, and on the other hand, it will also cause the sludge to converge towards the position of the collecting hole 41 under the drive of the spiral disturbing member 58, accelerating the sludge cleaning efficiency.

[0041] Embodiment 4: The end cover 3 close to the inclined tube 1 is fixedly connected to the rolling sleeve 2, and the end cover 3 far from the inclined tube 1 is movably connected to the rolling sleeve 2; a first extension groove 22 is arranged on the side of the rolling sleeve 2 far from the inclined tube 1; an extension sleeve 23 is slidably connected in the first extension groove 22; a second extension groove 42 communicated with the first extension groove 22 is arranged on the side of the partition plate 4 far from the inclined tube 1; an extension plate 44 fixedly connected to the extension sleeve 23 is slidably connected in the second extension groove 42; the end cover 3 far from the inclined tube 1 is fixedly connected to the extension sleeve 23 and the extension plate 44; the disturbing member 58 has elasticity and is made of elastic metal material.

[0042] In this embodiment, the outer surface of the end cap 3 far from the inclined tube 1 is rotationally and sealingly connected to the annular rotating groove 17 concentrically; a rotating ring 7 is rotationally and sealingly connected in the rotating groove 17; the bottom of the rotating groove 17 is communicated with the inside of the first extension groove 22 through a first air hole 441; the first extension groove 22 is slidably and sealingly connected to the extension sleeve 23; the second extension groove 42 is slidably and sealingly connected to the extension plate 44; second air holes 71 are provided through both end faces of the rotating ring 7; an arc-shaped cavity 72 is provided inside the rotating ring 7; the arc-shaped cavity 72 is arranged close to the second air holes 71.

[0043] The disturbing member 58 in the dredging cavity 43 is elastic and can always give two connected end caps 3 a force to move away from each other. After the dredging device is placed in the river, the size of the dredging cavity 43 in the dredging device will change according to the width of the river. During the rolling process of the dredging device, a narrower river will squeeze the end cap 3 far from the inclined tube 1, so that the end cap 3 far from the inclined tube 1 needs to overcome the disturbing member 58 and move closer to each other. The end cap 3 far from the inclined tube 1 will drive the extension sleeve 23 to slide in the first extension groove 22, and the end cap 3 far from the inclined tube 1 will drive the extension plate 44 to slide in the second extension groove 42, so that the space of the dredging cavity 43 in the width direction of the river will become smaller; if the width of the river is relatively wide, the disturbing member 58 will give a thrust to the end face far from the inclined tube 1, so that the two end caps 3 far from the inclined tube 1 move away from each other, making the space of the dredging cavity 43 in the width direction of the river larger. In this way, the dredging cavity 43 adapts to the river width in the width direction of the river, so as to meet the dredging requirements of rivers with different widths and improve the application range of the dredging device; in order to prevent silt from entering the first extension groove 22 and the second extension groove 42, the extension sleeve 23 is slidably and sealingly connected to the first extension groove 22, and the extension plate 44 is slidably and sealingly connected to the second extension groove 42. The slidable and sealing connection means that it can seal and slide but will not disengage; during the process of the extension sleeve 23 and the extension plate 44 approaching the inclined tube 1, the gas in the first extension groove 22 and the second extension groove 42 will be discharged along the first air hole 441 and the second air hole 71. During the process of the extension sleeve 23 and the extension plate 44 moving away from the inclined tube 1, the outside gas enters the first extension groove 22 and the second extension groove 42 along the second air hole 71 and the first air hole 441; the rotating ring 7 is rotationally and sealingly connected in the rotating groove 17, and an arc-shaped cavity 72 close to the second air holes 71 is provided inside the rotating ring 7. In this way, the center of gravity of the rotating ring 7 is far from the second air holes 71, so that the second air holes 71 are always located at the upper position of the rotating ring 7 to prevent the second air holes 71 from being blocked by the silt in the river.

[0044] Embodiment 5: An L-shaped groove 73 is provided on the side of the rotating ring 7 far from the inclined tube 1; the L-shaped groove 73 is communicated with the second air holes 71 and an L-shaped block 74 is slidably and sealingly connected inside; the L-shaped block 74 penetrates and is threadedly connected to a bolt 75.

[0045] During the dredging process of some river channels with a fixed width, the end cover 3 far from the inclined tube 1 can be controlled to move, and after changing the size of the dredging chamber 43, the bolt 75 can be loosened to disengage from the inner wall of the L-shaped groove 73, so that the L-shaped block 74 is unlocked in the L-shaped groove 73. The L-shaped block 74 will slide along the L-shaped groove 73 to block and seal the second air hole 71, and then the bolt 75 is tightened so that the bolt 75 abuts against the inner wall of the L-shaped groove 73 to lock the specification of the dredging chamber 43. During the dredging process of some river channels with a variable width, the bolt 75 can be loosened to drive the L-shaped block 74 to move away from the position of the second air hole 71, and then the bolt 75 is tightened. In addition, before transporting the dredging device, after loosening the bolt 75 to unlock the L-shaped block 74, the L-shaped block 74 is controlled to slide along the L-shaped groove 73 to open the second air hole 71. Then, the end cover 3 far from the inclined tube 1 is controlled to move, and when the dredging chamber 43 is in the smallest state, the L-shaped block 74 is driven again to block the second air hole 71, and the bolt 75 is tightened, so that the space of the dredging chamber 43 is small and it is convenient to transport the dredging device.

[0046] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the Figure 1 orientation or positional relationship shown, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as a limitation on the protection scope of the present invention. In addition, the terms "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0047] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A river dredging device based on a water conservancy project, comprising an inclined pipe and a branch pipe on the outer wall of the upper end of the inclined pipe; the branch pipe is connected to a driving device through a sludge pump; and it is characterized in that: The lower end of the inclined tube is horizontally and vertically connected to the horizontal tube; rolling sleeves are provided at both ends of the horizontal tube; end covers are connected to both ends of the rolling sleeves; the end of the horizontal tube passes through the end cover and extends to the inner side of the rolling sleeve, and the end of the horizontal tube is rotationally and sealingly connected to the end covers on both sides; the outer wall of the rolling sleeve is evenly fixed with partition plates; a plurality of partition plates are in contact with the end covers on both sides and form a silt cleaning cavity with the end covers on both sides; the silt cleaning cavity is communicated with the collection cavity inside the rolling sleeve through a collection hole; a driving member capable of being driven is provided in the silt cleaning cavity; The outer side of the lower end of the inclined tube is fixed with a middle shell; the middle shell is fixed with outer shells on both sides; the end of the horizontal tube passes through the middle shell and the outer shell; the inclined tube axially passes through and is rotationally connected to the inclined shaft; the upper end of the inclined shaft is driven by a motor, and the lower end passes through the horizontal tube and is fixed with a worm; the inner wall of the middle shell is rotationally connected to a worm gear meshing with the worm; the outer side of the outer shell is rotationally connected to an outer gear; the outer gear is connected to the center of the worm gear inside the middle shell through a transmission rod; the end cover at the end of the horizontal tube is rotationally and sealingly connected to the outer shell; both sides of the end cover close to the outer shell are penetrated and rotationally connected to a driven rod; one end of the driven rod located inside the outer shell is fixed with a driven gear; the driven gear meshes or disengages with the outer gear after rotating with the end cover; one end of the driven rod located in the silt cleaning cavity is fixed with a driving member; the outer gear is located directly below the horizontal tube; The driving member is in the shape of a spiral plate; the collection hole is arranged close to the inclined tube; a spiral conveyor plate is arranged inside the inclined tube; the spiral conveyor plate is fixed to the outer wall of the inclined shaft; A rotating cylinder is rotationally and sealingly connected inside the collection cavity; the opening of the rotating cylinder faces the horizontal tube; the end of the horizontal tube extends to the inner side of the rotating cylinder; communication holes are arranged through the inner and outer walls of the rotating cylinder; the center of gravity of the rotating cylinder is close to the communication holes; the communication holes are communicated with the collection holes directly below.

2. The dredging device for river channels based on water conservancy projects according to claim 1, wherein: An arc-shaped shielding seat is fixed to the front side in the moving direction of the outer shell; a mud-breaking knife is fixed to the lower position of the shielding seat.

3. A river dredging device based on a water conservancy project according to claim 1, characterized in that: The number of teeth of the outer gear is greater than the number of teeth of the driven gear.

4. A river dredging device based on water conservancy projects according to claim 1, characterized in that: The end cover close to the inclined tube is fixed to the rolling sleeve, and the end cover far from the inclined tube is movably connected to the rolling sleeve; a first extension groove is arranged on the side of the rolling sleeve far from the inclined tube; an extension sleeve is slidably connected in the first extension groove; a second extension groove communicated with the first extension groove is arranged on the side of the partition plate far from the inclined tube; An extension plate fixed to the extension sleeve is slidably connected in the second extension groove; the end cover far from the inclined tube is fixed to the extension sleeve and the extension plate; the driving member is elastic.

5. The dredging device for river channels based on water conservancy projects according to claim 4, characterized in that: A rotating groove is rotationally and sealingly connected to the outer surface of the end cover far from the inclined tube; a rotating ring is rotationally and sealingly connected in the rotating groove; the bottom of the rotating groove is communicated with the inside of the first extension groove through a first air hole; the first extension groove is slidably and sealingly connected to the extension sleeve; the second extension groove is slidably and sealingly connected to the extension plate; second air holes are arranged through both end faces of the rotating ring; the center of gravity of the rotating ring is far from the second air holes.

6. The dredging device for river channels based on water conservancy projects according to claim 5, characterized in that: An L-shaped groove is arranged on the side of the rotating ring far from the inclined tube; the second air holes are communicated in the L-shaped groove and an L-shaped block is slidably and sealingly connected inside; the L-shaped block is penetrated and threadedly connected with a bolt.

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