A dredging device for treating polluted bottom sediment

Abstract

The present invention discloses a dredging device for treating polluted sediment, which relates to the technical field of sludge treatment and is used to be installed on a cutter suction dredger. It includes a pipe body on the cutter suction dredger for installing a cutter head. A cover body is provided on the pipe body and a channel is opened on the cover body. The trajectory of the water flowing through the channel is parallel to the swinging trajectory of the pipe body, and the cutter head is arranged at the center position of the channel. By arranging the cutter head at the center position of the channel on the cover body, during the process of the cutter head cutting the polluted sediment, the suspended matter generated is difficult to diffuse into the water outside the cover body due to the obstruction of the cover body. And based on the suction effect of the mud suction pump, the suspended matter is basically sucked out of the water body. In this way, during the swinging stroke of the cover body following the pipe body, the secondary pollution of the water body can be effectively reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of sludge treatment, and specifically relates to a dredging device for treating polluted sediment. Background Art

[0002] As is well known, polluted sediment dredging refers to the process of cleaning and treating the polluted sediment at the bottom of water bodies. The pollution sources include industrial wastewater, agricultural chemical fertilizer and pesticide residues, urban sewage, etc. The sediment contains heavy metals, organic pollutants and other harmful substances. By dredging the polluted sediment, the water quality can be improved, the aquatic ecosystem can be restored, and the impact of pollutants on aquatic organisms and human health can be reduced.

[0003] Among them, the mechanical equipment used for dredging includes a cutter suction dredger, which cuts and suspends the silt in water through a cutter, and then uses a mud suction pump to extract these suspended substances into the mud hold of the ship. After the mud hold is full, the ship can discharge the silt to a designated location, or directly use a conveying system to transport the extracted sludge to the shore or other ships.

[0004] For example, the patent with the publication number CN206888047U, publication date January 16, 2018, and name "A Cutter Suction Dredger" belongs to the technical field of ships. It solves the technical problems such as the inconvenient adjustment of the cutter position of the existing cutter suction dredger. This cutter suction dredger includes a hull, a cutter and a cutter arm. A connecting arm is obliquely downwardly provided at the front end of the hull. The inner end of the connecting arm is hinged to the hull and the outer end of the connecting arm can swing up and down; the cutter is fixedly provided at the outer end of the cutter arm. The inner end of the cutter arm is hinged to the outer end of the connecting arm and the cutter arm can swing left and right; a winch one is provided in the middle of the hull, and winch twos and winch threes are respectively provided on both sides of the hull. Steel wires are wound on the winch one, winch twos and winch threes. The steel wire on the winch one is connected to the position near the outer end on the upper side of the connecting arm, and the steel wires on the winch twos and winch threes are respectively connected to the left and right sides of the cutter arm. This patent can conveniently and flexibly control the position adjustment of the cutter within a small range in a certain area.

[0005] The deficiencies of the prior art are that during the working process of the cutter suction dredger, the rotation of the cutter will stir the polluted sediment at the bottom of the water, which will have a greater negative impact on the water area ecological environment. For example, the turbidity of the suspended sediment will spread around, which will obviously cause greater secondary pollution to the surrounding water bodies. Summary of the Invention

[0006] The purpose of the present invention is to provide a dredging device for treating polluted sediment to solve the technical problems in the related art.

[0007] In order to achieve the above purpose, the present invention provides the following technical solutions:

[0008] A dredging device for treating polluted sediment, which is used to be installed on a cutter suction dredger, includes a pipe body on the cutter suction dredger for installing a cutter head. A cover body is provided on the pipe body and a channel is opened on the cover body. The trajectory of the water flowing through the channel is parallel to the swinging trajectory of the pipe body, and the cutter head is arranged at the central position of the channel.

[0009] As described above, the cover body is swingably arranged on the pipe body. The swinging direction of the cover body is cross-shaped with the swinging direction of the pipe body. After the cover body swings to any position on the pipe body, it is limited by fixing bolts.

[0010] As described above, the cover body includes a first plate body, a second plate body and a telescopic member. The first plate body is swingably arranged on the pipe body. The first plate body and the second plate body are arranged parallel to each other. The telescopic member is used to connect the first plate body and the second plate body; along the tangential direction of the swinging direction of the first plate body, based on the telescopic power of the telescopic member, the second plate body moves relative to the first plate body.

[0011] As described above, the opposite surfaces of the first plate body and the second plate body are both in an arc-shaped structure, and the center of the arc-shaped structure is on the swinging central axis of the pipe body.

[0012] As described above, the side surface of the second plate body facing away from the first plate body is in an arc-shaped structure, and the center of the arc-shaped structure is on the swinging central axis of the pipe body.

[0013] As described above, the included angle corresponding to the arc-shaped structure of the first plate body is the same as the included angle corresponding to the arc-shaped structure of the second plate body.

[0014] As described above, it further includes a material guiding mechanism, which includes a material guiding frame arranged on the second plate body. In the swinging direction of the pipe body, material guiding rods are arranged between the two ends of the material guiding frame and the two ends of the first plate body. The length of the material guiding frame is greater than the length of the second plate body. The material guiding rods are arranged obliquely between the material guiding frame and the first plate body.

[0015] As described above, the material guiding mechanism further includes a first guiding plate installed at the end of the first plate body facing away from the telescopic member. Along the swinging direction of the cover body on the pipe body, the position of the first guiding plate is lower than the position of the cutter head. In the swinging direction of the pipe body, both ends of the first guiding plate are in an inclined structure.

[0016] As described above, the material guiding mechanism further includes a second guiding plate installed at the end of the material guiding frame facing away from the telescopic member. Along the swinging direction of the cover body on the pipe body, the position of the second guiding plate is lower than the position of the cutter head. In the swinging direction of the pipe body, both ends of the second guiding plate are in an inclined structure.

[0017] As described above, the second guide plate is swingably arranged on the material guide frame, and a first elastic member is provided between the two. The swinging direction of the second guide plate is parallel to the swinging direction of the cover body on the pipe body.

[0018] The beneficial effects of the present invention are as follows: By arranging the reamer at the central position of the channel on the cover body, during the process of the reamer cutting the contaminated bottom mud, the suspended matter generated is difficult to diffuse into the water body outside the cover body due to the obstruction of the cover body, and based on the suction effect of the sludge pump, the suspended matter is basically pumped out of the water body. Thus, during the swinging stroke of the cover body following the pipe body, the secondary pollution of the water body can be effectively reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings.

[0020] Figure 1 It is a three-dimensional structure schematic diagram of a dredging device for treating contaminated bottom mud provided in an embodiment of the present invention during the swinging stroke in the second direction;

[0021] Figure 2 It is a first perspective exploded view of a dredging device for treating contaminated bottom mud provided in an embodiment of the present invention during the swinging stroke in the second direction;

[0022] Figure 3 It is a second perspective exploded view of a dredging device for treating contaminated bottom mud provided in an embodiment of the present invention during the swinging stroke in the second direction;

[0023] Figure 4 It is a schematic diagram of the cooperation structure between the extrusion block and the extrusion groove of a dredging device for treating contaminated bottom mud provided in an embodiment of the present invention during the swinging stroke in the second direction;

[0024] Figure 5 It is a three-dimensional structure schematic diagram of a dredging device for treating contaminated bottom mud provided in an embodiment of the present invention during the advancing process in the third direction;

[0025] Figure 6 It is a first perspective exploded view of a dredging device for treating contaminated bottom mud provided in an embodiment of the present invention during the advancing process in the third direction;

[0026] Figure 7 It is a second perspective exploded view of a dredging device for treating contaminated bottom mud provided in an embodiment of the present invention during the advancing process in the third direction;

[0027] Figure 8Schematic diagram of the cooperation structure between the extrusion block and the extrusion groove during the forward movement of a dredging device for treating polluted sediment provided in an embodiment of the present invention in the third direction.

[0028] Explanation of reference numerals:

[0029] 1. Pipe body; 10. Suction pipe; 11. Mounting seat; 2. Cutter; 3. Cover body; 30. Mounting groove; 31. Rotating shaft; 32. Rotating groove; 33. Fixed bolt; 34. First plate body; 35. Second plate body; 36. Telescopic member; 360. Guide groove; 361. Guide rod; 362. Connecting rod; 363. Telescopic plate; 364. Fixed plate; 4. Feeding mechanism; 40. Feeding frame; 41. Feeding rod; 42. Extrusion groove; 420. First branch groove; 421. Second branch groove; 422. Third branch groove; 423. Fourth branch groove; 43. Extrusion block; 44. First guide plate; 45. Second guide plate. Detailed implementation manners

[0030] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the following will be combined with the attached Figure 1 to the attached Figure 8 to make a further detailed introduction to the present invention.

[0031] An embodiment of the present invention provides a dredging device for treating polluted sediment, which is used to be installed on a cutter suction dredger. It includes a pipe body 1 on the cutter suction dredger for installing a cutter 2, a cover body 3 is provided on the pipe body 1 and a channel is opened on the cover body 3. The trajectory of the water flow through the channel is parallel to the swinging trajectory of the pipe body 1, and the cutter 2 is arranged at the central position of the channel.

[0032] Specifically, for the convenience of description and understanding, the direction in which the cutter head 2 enters the bottom from the water surface is named the first direction, the direction in which the cutter head 2 swings left and right to cut the polluted bottom mud is the second direction, and the advancing direction of the hull is the third direction. After the cutter suction dredger enters the target area, a steel pile at the tail of the hull will be inserted into the seabed to fix the ship. Then, transverse shift anchors are successively laid on both sides of the hull, and the cutter head 2 is placed on the seabed. By pulling the cable on the transverse shift anchor, the cutter head 2 swings left and right to cut the polluted bottom mud, so that the polluted bottom mud forms a muddy water mixture in the suspended matter water body formed by being cut and dispersed. At the same time, the suction pump uses suction to pump the muddy water mixture into the cabin and sprays it to the designated area on the shore through the discharge pipe. After swinging from left to right or from right to left once, two steel piles at the stern of the ship are alternately inserted into the seabed to push the hull forward by a distance, which is the width of the polluted bottom mud cut by the cutter head 2 each time it swings from left to right or from right to left, so as to realize continuous dredging. The pipe body 1 installed with the cutter head 2 is arranged on the hull through a cantilever. A transmission shaft for driving the cutter head 2 to rotate is installed in the pipe body 1, and a suction pipe 10 connected to the suction pump is also arranged on the pipe body 1. During the process of the cutter head 2 rotating and cutting the polluted bottom mud, it will stir the polluted bottom mud at the bottom of the water, which will have a greater negative impact on the water ecological environment. For example, the turbidity of the suspended sediment will spread around, which will obviously cause greater secondary pollution to the surrounding water body.

[0033] Based on the above technical problems, in this embodiment, a cover body 3 is arranged on the pipe body 1 installed with the cutter head 2. The cover body 3 is integrally in a C-shaped structure, that is, the cover body 3 is open in both the first direction and the second direction. A channel for the polluted bottom mud, water or muddy water mixture to flow through is formed on the cover body 3. The cutter head 2 is arranged at the center of the channel. During the process of the pipe body 1 swinging in the second direction, the polluted bottom mud and water that are not cut and dispersed by the cutter head 2 enter from one end of the cover body 3, and then the polluted bottom mud is cut and dispersed by the cutter head 2 and suspended in the water to form a muddy water mixture. At the same time, the suction force generated by the suction pump basically pumps the muddy water mixture out of the channel. After that, the amount of polluted bottom mud in the muddy water mixture discharged from the other end of the cover body 3 will be greatly reduced. And due to the obstruction of the cover body 3 and the suction effect of the suction pump, the formed muddy water mixture is difficult to diffuse into the water body outside the cover body 3.

[0034] The beneficial effect of this embodiment is that by arranging the cutter head 2 at the center of the channel on the cover body 3, during the process of the cutter head 2 cutting the polluted bottom mud in the second direction, the generated suspended matter (that is, the muddy water mixture) is difficult to diffuse into the water body outside the cover body 3 due to the obstruction of the cover body 3. And due to the suction effect of the suction pump, the suspended matter is basically pumped out of the water body. In this way, during the swinging stroke of the cover body 3 following the pipe body 1 in the second direction, the secondary pollution of the water body can be effectively reduced.

[0035] Preferably, the cover body 3 is swingably arranged on the pipe body 1, and the swing direction of the cover body 3 is crosswise with the swing direction of the pipe body 1. After the cover body 3 swings to any position on the pipe body 1, it is limited by the fixing bolt 33.

[0036] Specifically, a mounting seat 11 with a spherical structure is installed on the pipe body 1. Correspondingly, a mounting groove 30 adapted to the structure of the mounting seat 11 is formed on the cover body 3. The connection between the mounting seat 11 and the mounting groove 30 is similar to a ball hinge structure, which will not be elaborated here. And a rotating groove 32 is formed in the radial direction of a certain tangent parallel to the second direction in the mounting groove 30. A rotating shaft 31 is rotatably installed in the rotating groove 32, and the rotating shaft 31 is fixedly connected to the mounting seat 11. In this way, the cover body 3 swings along the first direction. When the polluted bottom mud at the bottom of a certain area needs to be cleaned, a detection device is used to detect the structure of the bottom of the water in advance to understand the structural characteristics of the bottom of the water. In this way, after the cutter 2 contacts the polluted bottom mud, the lower bottom surface of the cover body 3 in the first direction should be parallel to the bottom surface of the water, so as to avoid disturbing more polluted bottom mud. Therefore, the position of the cover body 3 can be set according to the actual detection structure, and the relative rotation between the cover body 3 and the mounting seat 11 is restricted by the fixing bolt 33.

[0037] Further, the cover body 3 includes a first plate body 34, a second plate body 35 and a telescopic member 36. The first plate body 34 is swingably arranged on the pipe body 1. The first plate body 34 and the second plate body 35 are arranged parallel to each other. The telescopic member 36 is used to connect the first plate body 34 and the second plate body 35; along the tangential direction of the swing direction of the first plate body 34, based on the telescopic power of the telescopic member 36, the second plate body 35 moves relative to the first plate body 34.

[0038] Specifically, after the reamer 2 swings from left to right or from right to left each time, it needs to move forward a certain distance in the third direction. Due to the structural characteristics of the cover 3, during the forward movement of the reamer 2, it will push some of the polluted sediment to move together. In this way, each time the reamer 2 advances here, it will push the polluted sediment here to move together, making it difficult to excavate the polluted sediment in this area. Moreover, the pushing of the cover 3 is also likely to cause secondary pollution of the surrounding water body. Therefore, in this embodiment, the cover 3 is set to a structure composed of a first plate body 34, a second plate body 35, and a telescopic member 36. That is, the installation groove 30 is opened on the first plate body 34, and the first plate body 34 and the second plate body 35 are connected by the telescopic member 36. The telescopic member 36 includes a guide groove 360 opened on the second plate body 35, and a guide rod 361 is slidably arranged in the guide groove 360. The sliding direction of the guide rod 361 in the guide groove 360 is tangent to a certain tangent direction of the first direction. That is, when the second plate body 35 and the first plate body 34 slide relative to each other, the distance between them in the third direction remains basically unchanged. The guide rod 361 is fixedly connected to the first plate body 34 through a connecting rod 362. The telescopic member 36 further includes a fixing plate 364 swingably arranged on the first plate body 34 and a telescopic plate 363 swingably arranged on the second plate body 35. The telescopic plate 363 is slidably arranged in the fixing plate 364, and a dynamic seal is provided between them. That is, the telescopic change principle between the fixing plate 364 and the telescopic plate 363 is basically the same as that of a cylinder. In this way, when the reamer 2 needs to move forward in the third direction, the telescopic plate 363 extends out of the fixing plate 364, driving the second plate body 35 to move relative to the first plate body 34. That is, the second plate body 35 is temporarily separated from the contact with the polluted sediment. After the forward movement of the reamer 2 ends, the telescopic plate 363 retracts into the fixing plate 364, driving the second plate body 35 to insert into the polluted sediment, and then the reamer 2 is driven to continue cutting the polluted sediment in the second direction.

[0039] Preferably, the opposite surfaces of the first plate body 34 and the second plate body 35 are both arc-shaped structures, and the center of the arc-shaped structure is on the swing axis of the pipe body 1; specifically, that is, when the polluted sediment and water pass through the channel, they are in the second direction, thereby reducing the resistance on the cover 3.

[0040] Preferably, the side surface of the second plate body 35 facing away from the first plate body 34 is an arc-shaped structure, and the center of the arc-shaped structure is on the swing axis of the pipe body 1; specifically, that is, when the polluted sediment and water contact the side of the second plate body 35 facing away from the channel, the arc-shaped structure can reduce the interaction force between them, thereby reducing the resistance on the cover 3.

[0041] Preferably, the included angle corresponding to the arc-shaped structure of the first plate body 34 is the same as the included angle corresponding to the arc-shaped structure of the second plate body 35; specifically, the structures of the first plate body 34 and the second plate body 35 are both basically arc-shaped structures, and the centers of the arc-shaped structures of the two are on the same central axis.

[0042] Further, a material guiding mechanism 4 is further included, which includes a material guiding frame 40 arranged on the second plate body 35. In the swinging direction of the pipe body 1, material guiding rods 41 are arranged between the two ends of the material guiding frame 40 and the two ends of the first plate body 34. The length of the material guiding frame 40 is greater than the length of the second plate body 35, and the material guiding rods 41 are arranged obliquely between the material guiding frame 40 and the first plate body 34.

[0043] Specifically, during the process of excavating contaminated bottom mud, there will inevitably be some obstacles in the contaminated bottom mud that hinder the advancement of the cutter head 2, such as branches, waterweeds, stones, etc. If not cleaned, the cutter head 2 will be damaged when cutting these obstacles, especially when encountering relatively hard obstacles such as stones. Therefore, in this embodiment, a material guiding frame 40 is arranged on the second plate body 35, and the length of the material guiding frame 40 is greater than the length of the second plate body 35, that is, in the second direction, the two ends of the material guiding frame 40 extend beyond the two ends of the second plate body 35. Then, material guiding rods 41 are further provided between the two ends of the material guiding frame 40 and the two ends of the first plate body 34. Based on the fact that the included angle corresponding to the arc-shaped structure of the first plate body 34 is the same as the included angle corresponding to the arc-shaped structure of the second plate body 35, the material guiding rods 41 must be inclined. And after the obstacles encounter the material guiding rods 41, they will be deflected by the material guiding rods 41 along the backward direction of the cutter head 2 in the first direction. The number of the material guiding rods 41 can be set according to actual applications, so as to avoid the contact between the obstacles and the cutter head 2 to a certain extent.

[0044] In an alternative embodiment, the material guiding frame 40 is movably arranged on the second plate body 35, that is, it can slide along the first direction, or along the second direction, or slide simultaneously along the first direction and the second direction. Then, an extrusion groove 42 is formed on the side surface of the material guiding frame 40 facing the first plate body 34. An extrusion block 43 is slidably arranged in the extrusion groove 42, and the extrusion block 43 is slidably arranged on the second plate body 35 along the third direction. In the sliding direction, a second elastic member is provided between the extrusion block 43 and the second plate body 35. The extrusion groove 42 is composed of two V-shaped structural grooves with openings facing the first direction, and the two V-shaped structural grooves are connected end to end. For the convenience of description and understanding, taking the extrusion block 43 sliding clockwise in the extrusion groove 42 as an example, the extrusion groove 42 includes a first branch groove 420, a second branch groove 421, a third branch groove 422, and a fourth branch groove 423. The first branch groove 420 includes an a end and a b end. Along the advancing direction of the reamer 2, the depth of the a end is greater than that of the b end. The second branch groove 421 includes a c end and a d end. Along the advancing direction of the reamer 2, the depth of the c end is greater than that of the b end. The third branch groove 422 includes an e end and an f end. Along the advancing direction of the reamer 2, the depth of the e end is greater than that of the d end. The fourth branch groove 423 includes a g end and an h end. Along the advancing direction of the reamer 2, the depth of the g end is greater than that of the f end, and the depth of the h end is less than that of the a end. In this way, during the process of the extrusion block 43 sliding clockwise in the extrusion groove 42, it cannot return from the c end to the b end, cannot return from the e end to the d end, cannot return from the g end to the f end, and cannot enter from the a end to the h end. Among them, the second plate body 35 can only move along the guiding direction of the guiding rod 361, and the extrusion block 43 will also move along with the second plate body 35. In this way, mutual extrusion will be formed between the extrusion block 43 and the side wall of the extrusion groove 42. Then, every time the reamer 2 needs to advance along the first direction and the second plate body 35 is driven to move relative to the first plate body 34, one end of the material guiding frame 40 extends out of the second plate body 35 along the second direction, and the other end retracts into the second plate body 35. Among them, the material guiding rod 41 is composed of two parts that can be telescopically changed. That is, when the reamer 2 moves leftward along the second direction, one end of the material guiding frame 40 extends out from the left side of the second plate body 35, and the other end retracts into the right side of the second plate body 35. On the contrary, the other end of the material guiding frame 40 extends out from the right side of the second plate body 35, and one end retracts into the left side of the second plate body 35. In this way, the inclination angle of the material guiding rod 41 between the material guiding frame 40 and the first plate body 34 can be closer to the optimal diversion angle (the optimal diversion angle can be measured according to the actual use situation and will not be elaborated here), so as to better guide the obstacles away from the moving path of the reamer 2.

[0045] Among them, if there are obstacles that are difficult to be diverted away, the telescopic member 36 can also be telescopically changed to drive the second plate body 35 to move, so that the material guiding frame 40 drives the material guiding rod 41 to swing, and the obstacles are guided away from the moving path of the reamer 2 in a dynamic manner.

[0046] Preferably, the material guiding mechanism 4 further includes a first guiding plate 44 installed at the end of the first plate body 34 facing away from the telescopic member 36. Along the swinging direction of the cover body 3 on the pipe body 1, the position of the first guiding plate 44 is lower than that of the reamer 2. In the swinging direction of the pipe body 1, both ends of the first guiding plate 44 are inclined structures.

[0047] Specifically, the structural characteristics of the first guiding plate 44 can, when encountering an obstacle at the bottom of the cover body 3, utilize the mutual extrusion effect between the first guiding plate 44 and the obstacle to press the obstacle deeper into the contaminated sediment or, if the obstacle is immovable, react on the first guiding plate 44, and then the first guiding plate 44 will drive the reamer 2 to move reversely along the first direction. Among them, a pressure detection mechanism can be provided between the pipe body 1 connecting the reamer 2 and the cantilever. When the first guiding plate 44 has a tendency to drive the reamer 2 to move reversely along the first direction, the pressure detection mechanism can detect this acting force, so that the control system can control the cantilever to drive the reamer 2 to move up a certain distance to cross the obstacle and avoid the reamer 2 contacting the obstacle.

[0048] Preferably, the material guiding mechanism 4 further includes a second guiding plate 45 installed at the end of the material guiding frame 40 facing away from the telescopic member 36. Along the swinging direction of the cover body 3 on the pipe body 1, the position of the second guiding plate 45 is lower than that of the reamer 2. In the swinging direction of the pipe body 1, both ends of the second guiding plate 45 are inclined structures.

[0049] Specifically, the function of the second guiding plate 45 is basically the same as that of the first guiding plate 44 in the foregoing embodiment, and will not be elaborated here.

[0050] In a further embodiment, the second guiding plate 45 is swingably arranged on the material guiding frame 40, and a first elastic member is provided between the two. The swinging direction of the second guiding plate 45 is parallel to the swinging direction of the cover body 3 on the pipe body 1.

[0051] Specifically, when the reamer 2 needs to move forward along the third direction, the material guiding frame 40 does not move with the second plate body 35. During the forward movement, there may also be situations where obstacles are encountered. Therefore, the second guiding plate 45 is swingably arranged on the material guiding frame 40, and the swinging direction is parallel to the swinging direction of the cover body 3 on the pipe body 1. In this way, when encountering an obstacle at the bottom of the cover body 3, by using the mutual extrusion effect between the second guiding plate 45 and the obstacle, the obstacle can be pressed deeper into the contaminated sediment, or if the obstacle is immovable, it will react on the second guiding plate 45, and then the second guiding plate 45 will drive the reamer 2 to move reversely along the first direction. Among them, the pressure detection mechanism can detect this acting force, so that the control system can control the cantilever to drive the reamer 2 to move up a certain distance to cross the obstacle and avoid the reamer 2 contacting the obstacle.

[0052] Only certain exemplary embodiments of the present invention have been described above by way of illustration. Without doubt, for those of ordinary skill in the art, the described embodiments can be modified in various different ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of the claims of the present invention.

Claims

1. A dredging device for treating polluted sediment, which is used to be installed on a cutter suction dredger, characterized in that: It comprises a pipe body for installing a reamer on the cutter suction dredger, the pipe body is provided with a cover body and a channel opened on the cover body, the track of water flowing through the channel is parallel to the swing track of the pipe body, and the reamer is arranged at the center of the channel; The cover body is swingably arranged on the tube body, the swinging direction of the cover body crosses the swinging direction of the tube body, and after the cover body swings to any position on the tube body, it is limited by fixing bolts; The cover body comprises a first plate body, a second plate body and a telescopic member, wherein the first plate body is swingably arranged on the tube body, the first plate body and the second plate body are arranged parallel to each other, and the telescopic member is used to connect the first plate body and the second plate body; in the tangential direction along the swinging direction of the first plate body, based on the telescopic power of the telescopic member, the second plate body and the first plate body move relative to each other; It also includes a material guiding mechanism, which includes a material guiding frame arranged on the second plate body, and material guiding rods are arranged between the two ends of the material guiding frame and the two ends of the first plate body in the swinging direction of the tube body, the length of the material guiding frame is greater than the length of the second plate body, and the material guiding rods are arranged obliquely between the material guiding frame and the first plate body.

2. The dredging device for treating polluted sediment according to claim 1, characterized in that: The opposite surfaces of the first plate body and the second plate body are both in an arc-shaped structure, and the center of the arc-shaped structure is on the swing center axis of the tube body.

3. The dredging device for treating polluted sediment according to claim 1, characterized in that: The side surface of the second plate body facing away from the first plate body is in an arc-shaped structure, and the center of the arc-shaped structure is on the swing center axis of the tube body.

4. The dredging device for treating polluted sediment according to claim 3, characterized in that: The included angle corresponding to the arc-shaped structure of the first plate body is the same as the included angle corresponding to the arc-shaped structure of the second plate body.

5. The dredging device for treating polluted sediment according to claim 1, characterized in that: The material guiding mechanism also includes a first guide plate installed at the end of the first plate body away from the telescopic member. Along the swinging direction of the cover body on the tube body, the position of the first guide plate is lower than the position of the reamer. In the swinging direction of the tube body, both ends of the first guide plate are inclined structures.

6. The dredging device for treating polluted sediment according to claim 1, characterized in that: The material guiding mechanism also includes a second guide plate installed at the end of the material guiding frame away from the telescopic member. Along the swinging direction of the cover body on the tube body, the position of the second guide plate is lower than the position of the reamer. In the swinging direction of the tube body, both ends of the second guide plate are inclined structures.

7. The dredging device for treating polluted sediment according to claim 6, characterized in that: The second guide plate is swingably arranged on the material guide frame, and a first elastic member is arranged between the two. The swinging direction of the second guide plate is parallel to the swinging direction of the cover body on the tube body.

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