Dredging device for treating polluted bottom mud

Abstract

The invention discloses a dredging device for treating polluted bottom mud, and relates to the related technical field of sludge treatment, the dredging device is used for being installed on a cutter suction dredger, the dredging device comprises a pipe body which is arranged on the cutter suction dredger and used for installing a reamer, the pipe body is provided with a cover body and a channel formed in the cover body, the track of the water flowing through the channel is parallel to the swinging track of the pipe body, and the reamer is arranged in the center of the channel; the reamer is arranged in the center of the channel on the cover body, generated suspended solids are blocked by the cover body and are difficult to diffuse into a water body outside the cover body in the process of cutting polluted bottom mud by the reamer, and the suspended solids are basically pumped out of the water body based on the pumping effect of the dredge pump, so that the suspended solids are prevented from being separated from the water body when the cover body swings along with the pipe body. And the secondary pollution to the water body can be effectively reduced.

Description

Technical Field

[0001] The invention relates to the technical field related to sludge treatment, in particular to a dredging device for treating polluted bottom sludge. Background Art

[0002] It is well known that dredging of contaminated sediments refers to the process of cleaning and treating contaminated sediments at the bottom of water bodies. The sources of pollution include industrial wastewater, agricultural fertilizer and pesticide residues, urban sewage, etc. The sediments contain heavy metals, organic pollutants and other harmful substances. Dredging of contaminated sediments can improve water quality, restore the aquatic ecosystem and reduce the impact of pollutants on aquatic organisms and human health.

[0003] Among the mechanical equipment used for dredging is a cutter suction dredger, which cuts the silt with a cutter and suspends it in the water, and then uses a dredging pump to extract the suspended matter into the ship's mud tank. When the mud tank 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 announcement number CN206888047U, the announcement date January 16, 2018, and the name "A Cutter Suction Dredger" belongs to the field of ship technology. It solves the technical problems of the existing cutter suction dredger, such as the inconvenient adjustment of the reamer position. The cutter suction dredger includes a hull, a reamer and a cutter arm. The front end of the hull is obliquely downwardly provided with a connecting arm, the inner end of the connecting arm is hinged on the hull and the outer end of the connecting arm can swing up and down; the reamer is fixed at the outer end of the cutter arm, the inner end of the cutter arm is hinged on the outer end of the connecting arm and the cutter arm can swing left and right; a capstan 1 is provided in the middle of the hull, and capstan 2 and capstan 3 are respectively provided on both sides of the hull. Capstan 1, capstan 2 and capstan 3 are all wound with steel wire ropes, the steel wire rope on capstan 1 is connected to the upper side of the connecting arm near the outer end, and the steel wire ropes on capstan 2 and capstan 3 are respectively connected to the left and right sides of the cutter arm. This patent can conveniently and flexibly control the reamer to adjust its position within a small range in a certain area.

[0005] The shortcoming of the existing technology is that during the operation of the cutter suction dredger, the rotation of the auger will stir the polluted bottom mud, which will have a significant negative impact on the ecological environment of the water area. For example, the turbidity of suspended sediments will spread around, which will obviously cause significant 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 object, the present invention provides the following technical solutions: A dredging device for treating polluted sediment, which is used to be installed on a cutter-suction dredger, comprises a pipe body on the cutter-suction dredger for installing a cutter, the pipe body is provided with a cover body and a channel opened on the cover body, the trajectory of water flowing through the channel is parallel to the swing trajectory of the pipe body, and the cutter is arranged at the center of the channel.

[0008] As mentioned above, the cover body is swingably arranged on the tube body, and the swinging direction of the cover body crosses with the swinging direction of the tube body. After the cover body swings to any position on the tube body, it is limited by fixing bolts.

[0009] As mentioned 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 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; 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 and the first plate body move relative to each other.

[0010] As mentioned above, the opposing 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.

[0011] As mentioned 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 swing center axis of the tube body.

[0012] As mentioned 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.

[0013] The above also includes a material guiding mechanism, which includes a material guiding rack arranged on the second plate body, and material guiding rods are arranged between the two ends of the material guiding rack and the two ends of the first plate body in the swinging direction of the tube body, the length of the material guiding rack is greater than the length of the second plate body, and the material guiding rods are arranged obliquely between the material guiding rack and the first plate body.

[0014] As mentioned above, 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.

[0015] As mentioned above, 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.

[0016] As mentioned above, the second guide plate is swingably arranged on the material guide frame, and a first elastic member is provided between the two, and the swinging direction of the second guide plate is parallel to the swinging direction of the cover body on the tube body.

[0017] The beneficial effect of the present invention is that by arranging the reamer at the center of the channel on the cover body, during the process of the reamer cutting the contaminated bottom mud, the suspended matter generated is blocked by the cover body and is difficult to diffuse into the water body outside the cover, and based on the suction action of the sludge suction pump, the suspended matter is basically extracted from the water body, so that 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

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of a dredging device for treating contaminated sediment provided in an embodiment of the present invention, in a swinging stroke along a second direction; Figure 2 An exploded view from a first perspective of a dredging device for treating contaminated sediment provided in an embodiment of the present invention during a swinging stroke along a second direction; Figure 3 An exploded view from a second perspective of a dredging device for treating contaminated sediment provided in an embodiment of the present invention during a swinging stroke along a second direction; Figure 4 It is a schematic diagram of the cooperation structure of the extrusion block and the extrusion groove in the swing stroke along the second direction of a dredging device for treating polluted sediment provided in an embodiment of the present invention; Figure 5 It is a schematic diagram of the three-dimensional structure of a dredging device for treating contaminated sediment provided in an embodiment of the present invention, during the process of moving along a third direction; Figure 6 An exploded view from a first perspective of a dredging device for treating contaminated sediment provided in an embodiment of the present invention during the process of moving along a third direction; Figure 7 An exploded view from a second perspective of a dredging device for treating contaminated sediment provided in an embodiment of the present invention during the process of moving along a third direction; Figure 8 It is a schematic diagram of the coordination structure of an extrusion block and an extrusion groove during the process of a dredging device for treating contaminated sediment provided in an embodiment of the present invention moving forward along a third direction.

[0020] Description of reference numerals: 1. Tube body; 10. Suction pipe; 11. Mounting seat; 2. Reamer; 3. Cover body; 30. Mounting groove; 31. Rotating shaft; 32. Rotating groove; 33. Fixing 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. Material guiding mechanism; 40. Material guiding frame; 41. Material guiding 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 DESCRIPTION

[0021] In order to enable those skilled in the art to better understand the technical solution of the present invention, Figure 1 To Attachment Figure 8 The present invention is further described in detail.

[0022] An embodiment of the present invention provides a dredging device for treating contaminated sludge, which is used to be installed on a cutter-suction dredger, and includes a pipe body 1 on the cutter-suction dredger for installing a reamer 2, wherein the pipe body 1 is provided with a cover body 3 and a channel opened on the cover body 3, the trajectory of water flowing through the channel is parallel to the swinging trajectory of the pipe body 1, and the reamer 2 is arranged at the center of the channel.

[0023] Specifically, for ease of description and understanding, the direction in which the auger 2 enters the bottom of the water from the water surface is named the first direction, the direction in which the auger 2 swings left and right to cut the contaminated sludge is the second direction, and the direction in which the hull moves forward is the third direction. After the suction dredger enters the target area, a steel pile at the stern of the hull will be inserted into the seabed to fix the ship, and then transverse anchors will be dropped on both sides of the hull in turn, and the auger 2 will be placed into the seabed. By pulling the cables on the transverse anchors, the auger 2 will be swung left and right to cut the contaminated sludge, so that the contaminated sludge forms a mud-water mixture in the water body where the suspended matter is cut and dispersed. At the same time, the dredge pump uses the suction force to pump the mud-water mixture into the cabin, and sprays it to the designated area on the shore through the dredge discharge pipe. After swinging from left to right or from right to left once, the two steel piles at the stern are alternately inserted into the seabed to push the hull forward a certain distance. This distance is the width of the contaminated sludge cut by the reamer 2 each time it swings from left to right or from right to left, thereby achieving continuous dredging. The pipe body 1 on which the reamer 2 is installed is arranged on the hull through a cantilever. A transmission shaft for driving the reamer 2 to rotate is installed in the pipe body 1, and a sludge suction pipe 10 connected to a sludge suction pump is also arranged on the pipe body 1. During the process of the reamer 2 rotating and cutting the contaminated sludge, the contaminated sludge on the bottom of the water will be stirred, which will have a greater negative impact on the ecological environment of the water area. For example, the turbidity of suspended sediments will spread around, which will obviously cause greater secondary pollution to the surrounding water bodies.

[0024] Based on the above technical problems, in this embodiment, a cover body 3 is arranged on the pipe body 1 where the reamer 2 is installed. The cover body 3 is integrally in a U-shaped structure, that is, the cover body 3 is open in both the first direction and the second direction. A channel is formed on the cover body 3 for the polluted bottom mud, water body or mud-water mixture to flow through. The reamer 2 is arranged at the center position of the channel. During the swinging process of the pipe body 1 along the second direction, the polluted bottom mud and water that are not cut and dispersed by the reamer 2 enter from one end of the cover body 3, and then the polluted bottom mud is cut and dispersed by the reamer 2 and suspended in the water body to form a mud-water mixture. At the same time, the suction force generated by the sludge pump basically pumps the mud-water mixture out of the channel. After that, the amount of polluted bottom mud in the mud-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 sludge pump, the formed mud-water mixture is difficult to diffuse into the water body outside the cover body 3.

[0025] The beneficial effect of this embodiment is that by arranging the reamer 2 at the center position of the channel on the cover body 3, during the process of the reamer 2 cutting the polluted bottom mud along the second direction, the generated suspended matter (that is, the mud-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 sludge pump, the suspended matter is basically pumped out of the water body. In this way, during the swinging process of the cover body 3 following the pipe body 1 along the second direction, the secondary pollution of the water body can be effectively reduced.

[0026] Preferably, the cover body 3 is swingably arranged on the pipe body 1. The swinging direction of the cover body 3 is cross-shaped with the swinging direction of the pipe body 1. After the cover body 3 swings to any position on the pipe body 1, it is limited by a fixing bolt 33.

[0027] 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 opened 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 opened 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 reamer 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.

[0028] Furthermore, 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 tube body 1, the first plate body 34 and the second plate body 35 are arranged parallel to each other, and 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 swinging direction of the first plate body 34, based on the telescopic power of the telescopic member 36, the second plate body 35 and the first plate body 34 move relative to each other.

[0029] Specifically, each time the reamer 2 swings from left to right or from right to left, it needs to move forward a certain distance in the third direction, and the structural characteristics of the cover body 3 will push part of the contaminated sludge to move together during the advancement of the reamer 2. In this way, each time the reamer 2 moves forward at this location, it will push the contaminated sludge here to move together, resulting in the contaminated sludge in this area being difficult to be excavated, and the pushing of the cover body 3 is also likely to cause secondary pollution of the surrounding water body. Therefore, in this embodiment, the cover body 3 is configured to be composed of a first plate body 34, a second plate body 35 and a telescopic member 36, that is, the mounting groove 30 is provided on the first plate body 34, and the first plate body 34 and the second plate body 35 are connected by a telescopic member 36, and the telescopic member 36 includes a guide groove 360 ​​provided on the second plate body 35, and a guide rod 361 is slidably provided in the guide groove 360, and 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, in the second plate body 35 When relative sliding occurs with the first plate body 34, the distance between the two along the third direction remains basically unchanged. The guide rod 361 is fixedly connected to the first plate body 34 through the connecting rod 362. The telescopic member 36 also includes a fixed 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 fixed plate 364, and a dynamic sealing member is provided between the two, that is, the telescopic change principle between the fixed plate 364 and the telescopic plate 363 is basically the same as that of the cylinder. In this way, when the reamer 2 needs to move forward along the third direction, the telescopic plate 363 extends from the fixed 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 contaminated bottom mud. After the reamer 2 finishes moving forward, the telescopic plate 363 retracts into the fixed plate 364, driving the second plate body 35 to insert into the contaminated bottom mud, and the reamer 2 is driven to continue cutting the contaminated bottom mud along the second direction.

[0030] Preferably, the opposing surfaces of the first plate 34 and the second plate 35 are both arc-shaped structures, and the center of the arc-shaped structure is on the swing center axis of the tube body 1; specifically, the contaminated sludge and water pass through the channel along the second direction, thereby reducing the resistance on the cover body 3.

[0031] Preferably, the side of the second plate body 35 facing away from the first plate body 34 is in an arc-shaped structure, and the center of the arc-shaped structure is on the swinging center axis of the tube body 1; specifically, when the contaminated sludge 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 the two, thereby reducing the resistance exerted on the cover body 3.

[0032] Preferably, the angle corresponding to the arc-shaped structure of the first plate body 34 is the same as the 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 basically arc-shaped structures, and the centers of the arc-shaped structures of the two are on the same central axis.

[0033] Furthermore, it also includes a material guiding mechanism 4, which includes a material guiding frame 40 arranged on the second plate body 35, and in the swinging direction of the tube 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, and the length of the material guiding frame 40 is greater than the length of the second plate body 35, and the material guiding rod 41 is arranged obliquely between the material guiding frame 40 and the first plate body 34.

[0034] Specifically, in the process of digging the contaminated sludge, it is inevitable that there will be some obstacles in the contaminated sludge that hinder the advance of the reamer 2, such as branches, water plants, stones, etc. If they are not cleaned, the reamer 2 will be damaged when cutting these obstacles, especially when encountering harder obstacles such as stones. Therefore, in this embodiment, a guide frame 40 is arranged on the second plate body 35, and the length of the guide frame 40 is greater than the length of the second plate body 35, that is, in the second direction, both ends of the guide frame 40 extend out of the second plate body 35, and then the two ends of the guide frame 40 and the two ends of the first plate body 34 are also provided with guide rods 41. Based on the fact that the angle corresponding to the arc-shaped structure of the first plate body 34 is the same as the angle corresponding to the arc-shaped structure of the second plate body 35, the guide rod 41 must be inclined, and after the obstacle encounters the guide rod 41, it will be guided by it toward the backward direction of the reamer 2 along the first direction. The number of guide rods 41 can be set according to actual applications, so that the obstacle can be prevented from contacting the reamer 2 to a certain extent.

[0035] In an optional embodiment, the guide frame 40 is movably arranged on the second plate body 35, that is, it can slide in the first direction or in the second direction, or slide in the first direction and the second direction at the same time, and then an extrusion groove 42 is opened on the side of the guide frame 40 facing the first plate body 34, and 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, and in the sliding direction, a second elastic member is provided between the extrusion block 43 and the second plate body 35, and the extrusion groove 42 consists of two V-shaped structural grooves opening toward the first direction, wherein the two V-shaped structural grooves are connected end to end, for the convenience of description and understanding, Taking the extrusion block 43 sliding in the extrusion groove 42 in the clockwise direction 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 forward direction of the reamer 2, the depth of the a end is greater than the depth of the b end. The second branch groove 421 includes a c end and a d end. Along the forward direction of the reamer 2, the depth of the c end is greater than the depth of the b end. The third branch groove 422 includes an e end and an f end. Along the forward direction of the reamer 2, the depth of the e end is greater than the depth of the d end. The fourth branch groove 423 includes a g end and an h end. Along the forward direction of the reamer 2, the depth of the g end is greater than the depth of the f end, and the depth of the h end is less than the a end. The end depth is such that the extrusion block 43 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 the H end from the A end during the process of sliding in the extrusion groove 42 in the clockwise direction. Among them, the second plate body 35 can only move along the guide direction of the guide rod 361, and the extrusion block 43 will also move with the second plate body 35. In this way, mutual extrusion is formed between the extrusion block 43 and the side wall of the extrusion groove 42. Then, each time the reamer 2 needs to move forward in the first direction, the second plate body 35 is driven to move relative to the first plate body 34, and one end of the guide frame 40 extends from the second plate body 35 along the second direction, and the other end is retracted from the first direction. The second plate body 35, wherein the guide rod 41 is composed of a two-part structure that can be telescopically changed, that is, when the reamer 2 moves to the left along the second direction, one end of the guide frame 40 extends from the left side of the second plate body 35, and the other end is retracted into the right side of the second plate body 35, and vice versa, the other end of the guide frame 40 extends from the right side of the second plate body 35, and one end is retracted into the right left side of the second plate body 35, so that the inclination angle of the guide rod 41 between the guide frame 40 and the first plate body 34 can be closer to the optimal diversion angle (the optimal diversion angle can be determined according to actual usage conditions, which will not be elaborated here), so as to better guide obstacles away from the moving path of the reamer 2.

[0036] If an obstacle that is difficult to be diverted away is encountered, the telescopic member 36 can also be telescopically changed to drive the second plate 35 to move, so that the guide frame 40 drives the guide rod 41 to swing, and the obstacle is dynamically guided away from the moving path of the reamer 2.

[0037] Preferably, the material guiding mechanism 4 further comprises a first guide plate 44 installed at the end of the first plate body 34 away from the telescopic member 36, and along the swinging direction of the cover body 3 on the tube body 1, the position of the first guide plate 44 is lower than the position of the reamer 2, and in the swinging direction of the tube body 1, both ends of the first guide plate 44 are inclined structures.

[0038] Specifically, the structural feature of the first guide plate 44 is that when encountering an obstacle at the bottom of the cover body 3, the mutual squeezing effect between the first guide plate 44 and the obstacle can be used to press the obstacle to a deeper position of the contaminated sediment or the obstacle cannot be moved, and the first guide plate 44 is reacted. Then, the first guide plate 44 will drive the reamer 2 to move in the opposite direction along the first direction. A pressure detection mechanism can be set between the tube body 1 connected to the reamer 2 and the cantilever. When the first guide plate 44 has a tendency to drive the reamer 2 to move in the opposite direction along the first direction, the pressure detection mechanism can monitor the 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, thereby preventing the reamer 2 from contacting the obstacle.

[0039] Preferably, the material guiding mechanism 4 further comprises a second guide plate 45 installed at the end of the material guiding frame 40 away from the telescopic member 36, and along the swinging direction of the cover body 3 on the tube body 1, the position of the second guide plate 45 is lower than the position of the reamer 2, and in the swinging direction of the tube body 1, both ends of the second guide plate 45 are inclined structures.

[0040] Specifically, the function of the second guide plate 45 is substantially the same as that of the first guide plate 44 in the aforementioned embodiment, and will not be elaborated herein.

[0041] In a further embodiment, the second guide plate 45 is swingably arranged on the material guide frame 40 , and a first elastic member is provided between the two, and the swing direction of the second guide plate 45 is parallel to the swing direction of the cover body 3 on the tube body 1 .

[0042] Specifically, when the reamer 2 needs to move forward in the third direction, the guide frame 40 does not move with the second plate 35. During the forward movement, obstacles may be encountered. Therefore, the second guide plate 45 is swung on the guide frame 40, and the swinging direction is parallel to the swinging direction of the cover body 3 on the tube body 1. In this way, when encountering an obstacle at the bottom of the cover body 3, the obstacle can be pressed to a deeper position of the contaminated sediment by the mutual squeezing effect between the second guide plate 45 and the obstacle, or the obstacle cannot be moved and the second guide plate 45 is reacted. Then, the second guide plate 45 will drive the reamer 2 to move in the opposite direction along the first direction. The pressure detection mechanism can monitor the 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, thereby preventing the reamer 2 from contacting the obstacle.

[0043] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of the protection 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 includes a first plate body, a second plate body and a telescopic member, 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; 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 and the first plate body move relative to each other.

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: 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.

6. The dredging device for treating polluted sediment according to claim 5, 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.

7. The dredging device for treating polluted sediment according to claim 5, 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.

8. The dredging device for treating polluted sediment according to claim 7, 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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