Mud-water separation device of dredger

Abstract

The invention discloses a mud-water separation device of a dredger, relates to the technical field of sludge treatment, and solves the problems that filter holes of geotechnical filter cloth are extremely easy to block by fine sand in mud, and the mud amount dug out during the working period of the dredger is large, so that mud-water separation is difficult when a large amount of mud is subjected to mud-water separation through the geotechnical filter cloth in a pipeline. In order to solve the problem that the mud filtering effect is poor due to the fact that filter holes of geotechnical filter cloth are likely to be blocked by fine sand, the mud filtering device comprises a rack fixedly connected with a dredger body, a water tank is installed on the lower side of the rack, and the mud filtering device further comprises a filtering mechanism used for filtering out water in mud and installed on the inner side of the rack and the inner side of the water tank; the knocking assembly is used for knocking the filtering mechanism; by installing the filtering mechanism and the water tank, a filtering belt in the filtering mechanism can filter moisture in sludge, the filtered sludge can be conveyed, the sludge can be continuously filtered by the filtering belt, and the filtering effect on the sludge excavated by the dredger is good.

Description

Technical Field

[0001] The invention relates to the technical field of sludge treatment, in particular to a dredging ship sludge-water separation device. Background Art

[0002] Dredgers are common construction vessels. They are responsible for clearing silt from waterways and rivers to allow other ships to pass through smoothly. They are also a powerful tool for blowing sand and filling the sea. As the main dredging force, dredgers play an important role in shipping, ports, and construction.

[0003] The existing Chinese patent CN116078017A discloses a method for filtering and draining mud entering a dredger and its implementation device. The mud entering the dredger is separated by the mud filtering and draining device while conveying the mud, and a slurry mixed with water and trace fine particles of mud and sand is discharged, which is beneficial to reduce the flow rate of mud entering the dredger and increase the concentration of mud entering the dredger. During use, the above device separates mud and water from the mud through the geotextile filter cloth in the porous tube. However, due to the high content of fine sand in the mud, the filter holes of the geotextile filter cloth are easily blocked by the fine sand in the mud during the filtering process of the mud. In addition, due to the large amount of mud dug out during the working period of the dredger, when a large amount of mud is separated from water through the geotextile filter cloth in the pipeline, the filter holes of the geotextile filter cloth may be blocked by fine sand, resulting in poor mud filtering effect. Summary of the invention

[0004] The object of the present invention is to provide a mud-water separation device for a dredger to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions: A mud-water separation device for a dredger comprises a frame fixedly connected to the hull of the dredger, a water tank being installed on the lower side of the frame, and a filtering mechanism for filtering out moisture in the sludge, the filtering mechanism being installed on the inner sides of the frame and the water tank; a knocking assembly for knocking the filtering mechanism, the knocking assembly being installed on the right side of the frame; a driving assembly for driving the knocking assembly to move, the driving assembly being installed between the filtering mechanism and the knocking assembly, the number of the driving assemblies being two groups and being symmetrically distributed; a water-displacing assembly for driving the liquid inside the frame to sway back and forth, the number of the water-displacing assemblies being two groups, and two of the water-displacing assemblies being installed on the inner side of the water tank; a connecting assembly for driving the water-displacing assembly to move, the connecting assembly being installed between the filtering mechanism and the water-displacing assembly, and the number of the connecting assemblies being equal to the number of the water-displacing assemblies.

[0006] Preferably, the filtering mechanism includes two rubber rollers 1 rotatably mounted on the frame through bearings, and the two rubber rollers 1 are symmetrically distributed on the left and right, a rubber roller 2 is rotatably mounted inside the water tank through bearings, a filter belt is cooperatively mounted on the outer sides of the two rubber rollers 1 and the rubber roller 2, and the front ends of the rubber roller 1 and the rubber roller 2 located on the right are fixedly connected to a motor.

[0007] Preferably, two symmetrically distributed guide plates are installed on the upper side of the filter belt, and the guide plates are fixedly connected to the hull of the dredger, a water guide plate is installed between the frame and the water tank, and the connection between the water guide plate and the frame is a fixed connection, the water guide plate is used to prevent water in the sludge from flowing into the water tank, and a mud guide plate is fixedly installed at the lower right end of the frame, and the mud guide plate is used to transfer the sludge to the hopper.

[0008] Preferably, the knocking assembly includes a knocking tube installed on the inner side of the filter belt, and the knocking tube knocking the filter belt can assist the filter belt to shake off silt, the outer side of the knocking tube is fixedly sleeved with two symmetrically distributed connecting blocks, the outer side of the connecting block is movably sleeved with a guide rail, and the guide rail is fixedly connected to the mud guide plate, the guide rail and the filter belt are perpendicular to each other, and the outer side of the connecting block is fixedly installed with two symmetrically distributed limit rods, and the connection between the limit rod and the guide rail is a sliding connection.

[0009] Preferably, a pin rod is fixedly embedded at the center of one end of the connecting block close to the frame, a spring 1 is movably sleeved on the outer side of the pin rod, and both ends of the spring 1 are movably abutted against the guide rail and the limit rod respectively, both ends of the knocking tube are fixedly installed with conduits communicated with each other, an air pump is fixedly installed at the lower end of the mud guide plate, and the conduit is communicated with the air pump, and the air pump can blow air into the knocking tube through the conduit.

[0010] Preferably, a plurality of through holes equidistantly distributed are provided on the outer side of the knocking tube, and the connecting assembly includes a push rod fixedly mounted on the outer side of the knocking tube, a ball is movably embedded in the end of the push rod away from the knocking tube, a disc is mounted on the lower side of the ball, and the disc is rotatably connected to the mud guide plate through a positioning shaft, the positioning shaft is assembled with a rubber roller on the right side through a synchronous wheel and a synchronous belt, a plurality of arc-shaped push blocks equidistantly distributed around the circumference are fixedly mounted on the outer side of the disc, and the ball is in rolling contact with the arc edge of the arc-shaped push block, and the ball is used to reduce the friction resistance between the push rod and the arc-shaped push block.

[0011] Preferably, the two water-repelling assemblies are respectively installed on the left and right sides of the filter belt, and the water-repelling assembly includes a positioning rod fixedly installed inside the water tank, and two symmetrically distributed limit strips are fixedly arranged on the outer side of the positioning rod, and the outer sides of the positioning rod and the limit strip are movably sleeved with a sleeve, and the limit strip is used to prevent the sleeve from rotating outside the positioning rod.

[0012] Preferably, a plurality of water-splashing plates equidistantly distributed are fixedly sleeved on the outer side of the sleeve, and the water-splashing plates are used to drive the water in the water tank to swing back and forth. The front end of the sleeve is movably abutted against a second spring, and the second spring is movably sleeved on the outer side of the positioning rod. One end of the second spring away from the sleeve is movably abutted against the water tank, and two symmetrically distributed connecting plates are fixedly installed on the outer side of the sleeve near its rear end.

[0013] Preferably, a second push rod is fixedly installed on the rear side of the connecting plate, and a second ball is movably embedded in one end of the second push rod away from the connecting plate. The connecting assembly includes a gear one fixedly installed on the rear end of the second rubber roller, and two second gears are cooperatively installed on the outer side of the first gear. The second gear is rotatably connected to the water tank through a second positioning shaft. The water tank contains clean water for cleaning the surface of the filter belt.

[0014] Preferably, one end of the second positioning shaft away from the second gear is fixedly connected with a second disc, and a side of the second disc away from the second positioning shaft is fixedly installed with a plurality of arc-shaped top blocks equidistantly distributed around the circumference, the arc-shaped top block is provided with an arc-shaped edge portion and a straight edge portion, and the arc-shaped top block can drive a plurality of water-deflecting plates to move through the arc-shaped edge portion, and the connection between the second ball and the arc-shaped edge portion of the arc-shaped top block is rolling contact.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention installs a filtering mechanism and a water tank. The filter belt in the filtering mechanism can filter out moisture in the sludge and can transport the filtered sludge. The filter belt after filtering the sludge moves in the water tank and can clean the surface of the filter belt, which is conducive to the filter belt to continuously filter the sludge and has a better filtering effect on the sludge dredged by the dredger.

[0016] 2. The present invention installs a knocking assembly and a driving assembly. The knocking tube in the knocking assembly can reciprocately knock the inner side of the filter belt under the cooperation of the driving assembly and a spring, which is helpful to assist the filter belt to shake off the silt. In addition, a plurality of through holes are opened on the side of the knocking tube in contact with the filter belt. Gas is blown out from the through holes, which can blow out the mud and sand blocked in the pores of the filter belt.

[0017] 3. The present invention installs a water-repelling assembly and a connecting assembly, and the water-repelling plate in the water-repelling assembly can move back and forth under the cooperation of the connecting assembly and the second spring, thereby facilitating the clean water in the water tank to swing back and forth. The clean water that swings back and forth can increase the cleaning force of the clean water on the filter belt, effectively improving the cleaning effect on the filter belt. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is an overall schematic diagram of the present invention; Figure 2 It is a side sectional schematic diagram of the present invention; Figure 3 It is an overall schematic diagram of the filtering mechanism of the present invention; Figure 4 It is a schematic diagram of the connection between the filter cloth and the knocking assembly of the present invention; Figure 5 This is a schematic diagram of the splitting of the knocking component and the driving component of the present invention; Figure 6 This is a schematic diagram of the inner side of the water tank of the present invention; Figure 7 It is a schematic diagram of the connection between the rubber roller 2, the water-repelling assembly and the connecting assembly of the present invention; Figure 8 This is a schematic diagram of the separation of the water-repelling component and the connecting component of the present invention.

[0019] In the figure: 1, frame; 2, water tank; 3, rubber roller one; 4, rubber roller two; 5, filter belt; 6, motor; 7, guide plate; 8, water guide plate; 9, mud guide plate; 10, knocking tube; 11, connecting block; 12, guide rail; 13, limit rod; 14, pin rod; 15, spring one; 16, guide tube; 17, air pump; 18, through hole; 19, push rod one; 20, ball one; 21, disc one; 22, positioning shaft one; 23, arc push block; 24, positioning rod; 25, limit strip; 26, sleeve; 27, water deflector; 28, spring two; 29, connecting plate; 30, push rod two; 31, ball two; 32, gear one; 33, gear two; 34, positioning shaft two; 35, disc two; 36, arc push block. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] Example 1: Please refer to Figure 1-Figure 4The mud-water separation device of a dredger shown in the figure includes a frame 1 fixedly connected to the hull of the dredger, a water tank 2 is installed on the lower side of the frame 1, and also includes a filtering mechanism for filtering out moisture in the sludge, and the filtering mechanism is installed on the inner side of the frame 1 and the water tank 2; a knocking component for knocking the filtering mechanism, and the knocking component is installed on the right side of the frame 1; a driving component for driving the knocking component to move, and the driving component is installed between the filtering mechanism and the knocking component. The number of driving components is two groups and is symmetrically distributed; a water-displacing component for driving the liquid inside the frame 1 to shake back and forth, and the number of water-displacing components is two groups, and two water-displacing components are installed on the inner side of the water tank 2; a connecting component for driving the water-displacing component to move, and the connecting component is installed between the filtering mechanism and the water-displacing component, and the number of connecting components is equal to the number of water-displacing components.

[0022] The filtering mechanism includes two rubber rollers 3 rotatably mounted on the frame 1 through bearings, and the two rubber rollers 3 are symmetrically distributed on the left and right. A rubber roller 2 4 is rotatably mounted inside the water tank 2 through bearings. A filter belt 5 is mounted on the outer sides of the two rubber rollers 3 and the rubber roller 2 4. The front ends of the rubber roller 3 and the rubber roller 2 4 located on the right are fixedly connected to a motor 6.

[0023] Two symmetrically distributed guide plates 7 are installed on the upper side of the filter belt 5, and the guide plates 7 are fixedly connected to the hull of the dredger. A water guide plate 8 is installed between the frame 1 and the water tank 2, and the connection between the water guide plate 8 and the frame 1 is a fixed connection. The water guide plate 8 is used to prevent water in the sludge from flowing into the water tank 2. A mud guide plate 9 is fixedly installed at the lower right end of the frame 1, and the mud guide plate 9 is used to transfer the sludge to the hopper.

[0024] Working principle: the dredger places the excavated silt on the filter belt 5, and the rubber roller 1 3 and the rubber roller 2 4 rotate, so that the filter belt 5 can rotate around the two rubber rollers 1 3 and the rubber roller 2 4, and the filter belt 5 transports the silt during the rotation. During the transportation, the filter belt 5 can filter out the moisture in the silt (a tooth rake can be installed on the upper side of the filter belt 5 to assist the silt to be flattened on the filter belt 5. Since the tooth rake belongs to the prior art, it will not be described here), and the water in the silt is directly discharged through the filter belt 5, and the silt with moisture filtered out will automatically fall on the mud guide plate 9 during the rotation of the filter belt 5, and automatically slide into the hopper through the mud guide plate 9. During the movement of the filter belt 5 in the water tank 2, its surface contacts the clean water in the water tank 2, and the clean water can clean the mud and sand on the surface of the filter belt 5, which is beneficial for the filter belt 5 to continuously filter the silt, and has a better filtering effect on the silt excavated by the dredger.

[0025] Example 2: Please refer to Figure 2 , Figure 4 , Figure 5The present embodiment further explains the first embodiment. The knocking assembly includes a knocking tube 10 installed on the inner side of the filter belt 5. The knocking tube 10 knocks on the filter belt 5 to assist the filter belt 5 in shaking off the silt. The outer side of the knocking tube 10 is fixedly sleeved with two symmetrically distributed connecting blocks 11. The outer side of the connecting block 11 is movably sleeved with a guide rail 12, and the guide rail 12 is fixedly connected to the mud guide plate 9. The guide rail 12 and the filter belt 5 are perpendicular to each other. Two symmetrically distributed limit rods 13 are fixedly installed on the outer side of the connecting block 11, and the connection between the limit rod 13 and the guide rail 12 is a sliding connection.

[0026] A pin rod 14 is fixedly embedded at the center of one end of the connecting block 1 close to the frame 1, a spring 15 is movably sleeved on the outer side of the pin rod 14, and the two ends of the spring 15 are movably abutted against the guide rail 12 and the limit rod 13 respectively, and both ends of the knocking tube 10 are fixedly installed with a conduit 16 connected to each other, and an air pump 17 is fixedly installed at the lower end of the mud guide plate 9, and the conduit 16 is connected to the air pump 17, and the air pump 17 can blow air into the knocking tube 10 through the conduit 16.

[0027] The outer side of the knocking tube 10 is provided with a plurality of through holes 18 which are distributed at equal distances. The connecting assembly includes a push rod 19 which is fixedly mounted on the outer side of the knocking tube 10. A ball 20 is movably embedded in one end of the push rod 19 which is away from the knocking tube 10. A disc 21 is mounted on the lower side of the ball 20. The disc 21 is rotatably connected to the mud guide plate 9 through a positioning shaft 22. The positioning shaft 22 is assembled with a rubber roller 3 on the right side through a synchronous wheel and a synchronous belt. A plurality of arc-shaped push blocks 23 which are distributed at equal distances around the circumference are fixedly mounted on the outer side of the disc 21. The ball 20 is in rolling contact with the arc edge of the arc-shaped push block 23. The ball 20 is used to reduce the friction resistance between the push rod 19 and the arc-shaped push block 23.

[0028] In the present embodiment: during the clockwise rotation of the rubber roller 3, the rubber roller 3 drives the disc 21 to rotate through the synchronous wheel and the synchronous belt, and the plurality of arc-shaped push blocks 23 drive the top rod 19 and the knocking tube 10 to move through the arc-shaped edge during the clockwise rotation with the disc 21. When the ball 20 at the end of the top rod 19 breaks away from the arc-shaped push block 23, the knocking tube 10 instantly moves back under the drive of the compression elastic force of the spring 15, and hits the filter belt 5, which can help the filter belt 5 to shake off the silt adhering to its surface, and when the knocking tube 10 reciprocates to knock the filter belt 5, the air pump 17 inflates the inside of the knocking tube 10 through the conduit 16, and the gas in the knocking tube 10 is discharged through the plurality of through holes 18. Therefore, when the plurality of through holes 18 on the outside of the knocking tube 10 fits with the filter belt 5, the gas can blow out the mud in the pores of the filter belt 5.

[0029] Example 3: Please refer to Figure 6-Figure 8This embodiment further explains Example 2. Two water-repelling assemblies are respectively installed on the left and right sides of the filter belt 5. The water-repelling assembly includes a positioning rod 24 fixedly installed inside the water tank 2. Two symmetrically distributed limiting strips 25 are fixedly arranged on the outer side of the positioning rod 24. The outer sides of the positioning rod 24 and the limiting strip 25 are movably sleeved with a sleeve 26. The limiting strip 25 is used to prevent the sleeve 26 from rotating outside the positioning rod 24.

[0030] The outer side of the sleeve 26 is fixedly sleeved with a plurality of equally spaced water-pumping plates 27, which are used to drive the water in the water tank 2 to swing back and forth. The front end of the sleeve 26 is movably abutted against a spring 28, and the spring 28 is movably sleeved on the outer side of the positioning rod 24. The end of the spring 28 away from the sleeve 26 is movably abutted against the water tank 2. Two symmetrically distributed connecting plates 29 are fixedly installed on the outer side of the sleeve 26 near its rear end. The water in the water tank 2 is replaced through the water inlet pipe and the drain pipe.

[0031] A push rod 2 30 is fixedly installed on the rear side of the connecting plate 29, and a ball 2 31 is movably embedded in the end of the push rod 2 30 away from the connecting plate 29. The connecting assembly includes a gear 1 32 fixedly installed on the rear end of the rubber roller 2 4, and two gears 2 33 are cooperatedly installed on the outer side of the gear 1 32. The gear 2 33 is rotatably connected to the water tank 2 through the positioning shaft 2 34. The water tank 2 contains clean water for cleaning the surface of the filter belt 5.

[0032] One end of the positioning shaft 2 34 away from the gear 2 33 is fixedly connected to the disc 2 35, and a side of the disc 2 35 away from the positioning shaft 2 34 is fixedly installed with multiple arc-shaped top blocks 36 distributed equidistantly around the circumference, and the arc-shaped top blocks 36 are provided with arc-shaped edge portions and straight edge portions. The arc-shaped top blocks 36 can drive multiple water-deflecting plates 27 to move through the arc-shaped edge portions, and the connection between the ball 2 31 and the arc-shaped edge portion of the arc-shaped top blocks 36 is rolling contact.

[0033] In this embodiment: when the motor 6 drives the rubber roller 24 to rotate, the rubber roller 24 drives the disc 2 35 to rotate through the gear 1 32 and the gear 2 33. When the multiple arc-shaped top blocks 36 rotate with the disc 2 35, the arc-shaped top blocks 36 will drive the top rod 2 30 and the multiple water-deflecting plates 27 to move forward through the arc-shaped edge. When the ball 2 31 at the end of the top rod 2 30 disengages from the arc-shaped top block 36 through the straight edge, the multiple water-deflecting plates 27 will move back and forth under the drive of the compression force of the spring 2 28. In this reciprocating manner, the multiple water-deflecting plates 27 can move back and forth in the water tank 2, thereby driving the water in the water tank 2 to swing back and forth. The clean water that swings back and forth can increase the cleaning force of the clean water on the filter belt 5, effectively improving the cleaning effect of the filter belt 5.

[0034] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0035] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A mud-water separation device for a dredger, comprising a frame (1) fixedly connected to the hull of the dredger, a water tank (2) being installed on the lower side of the frame (1), characterized in that: Also includes: A filtering mechanism, used for filtering out moisture in the sludge, the filtering mechanism being installed on the inner side of the frame (1) and the water tank (2); A knocking assembly, used for knocking the filtering mechanism, the knocking assembly being mounted on the right side of the frame (1); A driving assembly, used for driving the knocking assembly to move, wherein the driving assembly is installed between the filtering mechanism and the knocking assembly, and the number of the driving assemblies is two groups, and they are symmetrically distributed; A water-displacing assembly, used to drive the liquid inside the frame (1) to slosh back and forth, the number of the water-displacing assemblies being two groups, and the two water-displacing assemblies being installed on the inner side of the water tank (2); The connecting assembly is used to drive the water-repelling assembly to move. The connecting assembly is installed between the filtering mechanism and the water-repelling assembly. The number of the connecting assembly is equal to the number of the water-repelling assembly.

2. A dredging vessel mud-water separation device according to claim 1, characterized in that: The filtering mechanism comprises two rubber rollers (3) rotatably mounted on the frame (1) via bearings, and the two rubber rollers (3) are symmetrically distributed on the left and right. A rubber roller (4) is rotatably mounted inside the water tank (2) via bearings. A filter belt (5) is mounted on the outer sides of the two rubber rollers (3) and the rubber roller (4). The front ends of the rubber rollers (3) and the rubber roller (4) located on the right are fixedly connected to a motor (6).

3. The mud-water separation device for a dredger according to claim 2, characterized in that: Two symmetrically distributed guide plates (7) are installed on the upper side of the filter belt (5), and the guide plates (7) are fixedly connected to the hull of the dredger. A water guide plate (8) is installed between the frame (1) and the water tank (2), and the connection between the water guide plate (8) and the frame (1) is a fixed connection. A mud guide plate (9) is fixedly installed at the lower right end of the frame (1).

4. The mud-water separation device for a dredger according to claim 3, characterized in that: The knocking assembly comprises a knocking tube (10) installed on the inner side of the filter belt (5), the outer side of the knocking tube (10) is fixedly sleeved with two symmetrically distributed connecting blocks (11), the outer side of the connecting block (11) is movably sleeved with a guide rail (12), and the guide rail (12) is fixedly connected to the mud guide plate (9), the guide rail (12) and the filter belt (5) are perpendicular to each other, and the outer side of the connecting block (11) is fixedly installed with two symmetrically distributed limiting rods (13), and the connection between the limiting rod (13) and the guide rail (12) is a sliding connection.

5. The mud-water separation device for a dredger according to claim 4, characterized in that: A pin rod (14) is fixedly embedded at the center of one end of the connecting block (11) close to the frame (1); a spring (15) is movably sleeved on the outer side of the pin rod (14); and the two ends of the spring (15) are movably abutted against the guide rail (12) and the limit rod (13) respectively; a conduit (16) communicating with the knocking tube (10) is fixedly mounted at both ends; an air pump (17) is fixedly mounted at the lower end of the mud guide plate (9), and the conduit (16) and the air pump (17) are communicated with each other.

6. The mud-water separation device for a dredger according to claim 5, characterized in that: The outer side of the knocking tube (10) is provided with a plurality of through holes (18) distributed at equal distances. The connecting assembly comprises a push rod (19) fixedly mounted on the outer side of the knocking tube (10). A ball (20) is movably embedded in the end of the push rod (19) away from the knocking tube (10). A disc (21) is mounted on the lower side of the ball (20). The disc (21) is rotatably connected to the mud guide plate (9) via a positioning shaft (22). The positioning shaft (22) is driven and assembled with a rubber roller (3) located on the right side via a synchronous wheel and a synchronous belt. A plurality of arc-shaped push blocks (23) distributed at equal distances around the circumference are fixedly mounted on the outer side of the disc (21). The ball (20) is in rolling contact with the arc-shaped edge of the arc-shaped push block (23).

7. The mud-water separation device for a dredger according to claim 2, characterized in that: The two water-repelling assemblies are respectively installed on the left and right sides of the filter belt (5), and the water-repelling assembly comprises a positioning rod (24) fixedly installed inside the water tank (2), two symmetrically distributed limiting strips (25) are fixedly arranged on the outer side of the positioning rod (24), and sleeves (26) are movably sleeved on the outer sides of the positioning rod (24) and the limiting strips (25).

8. The mud-water separation device for a dredger according to claim 7, characterized in that: The outer side of the sleeve (26) is fixedly sleeved with a plurality of water-dispelling plates (27) distributed at equal distances, the front end of the sleeve (26) is movably abutted against a second spring (28), and the second spring (28) is movably sleeved on the outer side of the positioning rod (24), the end of the second spring (28) away from the sleeve (26) is movably abutted against the water tank (2), and the outer side of the sleeve (26) near its rear end is fixedly mounted with two symmetrically distributed connecting plates (29).

9. The mud-water separation device for a dredger according to claim 8, characterized in that: A second push rod (30) is fixedly mounted on the rear side of the connecting plate (29), and a second ball (31) is movably embedded in one end of the second push rod (30) away from the connecting plate (29). The connecting assembly comprises a first gear (32) fixedly mounted on the rear end of the second rubber roller (4), and two second gears (33) are mounted on the outer side of the first gear (32). The second gear (33) is rotatably connected to the water tank (2) via a second positioning shaft (34).

10. The mud-water separation device for a dredger according to claim 9, characterized in that: The second positioning shaft (34) is fixedly connected to one end away from the second gear (33) with a second disc (35), and a side of the second disc (35) away from the second positioning shaft (34) is fixedly mounted with a plurality of arc-shaped top blocks (36) distributed equidistantly around the circumference, the arc-shaped top blocks (36) being provided with arc-shaped edge portions and straight edge portions, and the connection between the second ball (31) and the arc-shaped top block (36) is in rolling contact.

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