A grab bucket dredger

Abstract

This invention discloses a grab dredger, belonging to the field of dredging technology. The grab dredger includes a hull, with a support frame at one end of the hull. A winch mechanism is located at the end of the support frame furthest from the hull. The winch mechanism has a first pull rope and a second pull rope. A fixed seat is connected to the bottom of the first pull rope, and a movable seat is connected to the bottom of the second pull rope. The movable seat is positioned below the fixed seat, and rotating rods are located on both sides of the movable seat. Each rotating rod is connected to a water-filtering grab bucket, and a swing rod is movably connected to the end of the water-filtering grab bucket furthest from the rotating rod. During the grabbing and hoisting process, the water-filtering grab bucket of this invention filters the silt, removing water from the silt. This eliminates the need to collect seawater and silt together into the dredger. Furthermore, during silt grabbing, a top cover plate shields the upper side of the water-filtering grab bucket, preventing silt entering the bucket from falling out, ensuring effective silt grabbing and thus improving silt grabbing efficiency.

Description

Technical Field

[0001] This invention relates to the field of dredging technology, and more particularly to a grab bucket dredging vessel. Background Technology

[0002] Dredgers are responsible for clearing silt from port channels to allow other vessels to pass smoothly. Common types include cutter suction dredgers, chain bucket dredgers, trailing suction hopper dredgers, bucket dredgers, excavator-type dredgers, and grab bucket dredgers. Grab bucket dredgers use the boom and steel cables of a rotary excavator to suspend a grab bucket. Under the weight of the grab bucket itself, it is lowered into the riverbed to grab mud. Then, the bucket winch is activated, and the grab bucket is closed and raised through the pulley at the top of the boom. Finally, the excavator is rotated to the predetermined point to unload the mud.

[0003] When grab dredgers use their grab buckets to scoop up silt from port channels, they trap seawater inside the grab bucket. When unloading the silt onto the dredger, seawater is also introduced into the dredger, resulting in an excessive load on the dredger. Furthermore, to load more silt, the dredger needs to pump out the upper seawater and discharge it into the river, leading to additional procedures and wasting a lot of time. In addition, when the grab bucket is closed to grab silt, a lot of silt falls out from the opening on the upper side of the grab bucket during the grabbing process, reducing the amount of silt that the grab bucket can grab at one time and affecting the dredging efficiency of the grab bucket. Summary of the Invention

[0004] The purpose of this invention is to solve the problems existing in the prior art and to propose a grab bucket dredger.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A grab dredger includes a hull, a support frame at one end of the hull, a winch mechanism at the end of the support frame away from the hull, a first pull rope and a second pull rope, a fixed seat connected to the bottom of the first pull rope, a movable seat connected to the bottom of the second pull rope, the movable seat being located below the fixed seat, rotating rods on both sides of the movable seat, each rotating rod being connected to a water-filtering grab bucket, a swing rod movably connected to the end of the water-filtering grab bucket away from the rotating rod, the end of the swing rod away from the water-filtering grab bucket being movably connected to the fixed seat, a squeezing assembly on the movable seat, and a top cover plate on each water-filtering grab bucket.

[0007] Preferably, the water-filtering grab includes a grab body connected to a rotating rod. The inner side wall of the grab body has a movable groove. A filter plate is connected to the movable groove by a pin. A torsion spring is sleeved on the pin, with its two ends connected to the filter plate and the grab body respectively, and used for the filter plate to rotate and reset. The outer side wall of the grab body has a drainage groove that communicates with the movable groove.

[0008] Preferably, the extrusion assembly includes a hydraulic cylinder fixed on a movable seat, the piston rod of the hydraulic cylinder is connected to a lower pressure plate, and the fixed seat has a groove that cooperates with the hydraulic cylinder.

[0009] Preferably, the two ends of the upper cover plate are rotatably connected to the water-filtering grab and the lower pressure plate, respectively. The upper cover plate includes an outer cover plate rotatably connected to the grab body, an inner slide plate rotatably connected to the lower pressure plate, and a first elastic element disposed between the outer cover plate and the inner slide plate. The inner slide plate is slidably connected inside the outer cover plate.

[0010] Preferably, a drive gear is provided on the outer side of the rotating rod, a driven gear is meshed on the outer side of the drive gear, a rotating shaft is rotatably connected between the driven gear and the moving seat, a drum is provided on the rotating shaft, a third pull rope is wound on the drum, and the end of the third pull rope away from the drum passes through the grab bucket body and is connected to the filter plate.

[0011] Preferably, the drive gear includes a main gear body and an arc-shaped rack evenly arranged on the outer side of the main gear body in a circular pattern. The arc-shaped rack meshes with the driven gear, and the driven gear is configured as a one-way gear.

[0012] Preferably, the first pull rope, the second pull rope, and the third pull rope are all made of steel wire rope.

[0013] Preferably, a guide rod is fixedly provided on the top of the movable seat, the fixed seat slides on the outside of the guide rod, and a limit plate is provided on the top of the guide rod.

[0014] Preferably, the top of the fixed base is provided with a sleeve sleeved on the outside of the guide rod, the limiting plate is slidably connected inside the sleeve, the sleeve is provided with an air inlet valve and an air outlet valve, the sleeve is connected to an exhaust pipe through the air outlet valve, the end of the exhaust pipe away from the sleeve is connected to the grab bucket body, and the inner wall of the movable groove of the grab bucket body is provided with a jet nozzle connected to the exhaust pipe.

[0015] Preferably, the grab body is provided with a guide wheel that is slidably arranged with the exhaust pipe.

[0016] Compared with the prior art, the present invention provides a grab bucket dredger, which has the following beneficial effects:

[0017] 1. This grab dredger, by installing an upper cover plate on the water-filtering grab, blocks the upper side of the water-filtering grab during sludge grabbing, preventing sludge entering the water-filtering grab from falling out, thus ensuring the sludge grabbing effect. Moreover, the water-filtering grab filters the sludge during the grabbing and hoisting process, and the squeezing component works with the upper cover plate to discharge the water in the sludge, eliminating the need to collect seawater and sludge together into the dredger, thereby improving the sludge grabbing efficiency.

[0018] 2. During the dredging process of the grab bucket, the grab buckets on both sides of the moving seat move away from each other, causing the drive gear and driven gear to mesh intermittently. This causes the driven gear to drive the rotating shaft to rotate back and forth, which in turn drives the drum to pull the third rope in a cyclical manner. The third rope exerts a force on the filter plate, causing the filter plate to shake back and forth during the dredging process. This prevents silt residue from remaining on the inside of the filter plate and avoids clogging of the filter plate pores, ensuring the continuous drainage efficiency and effect of the filter plate.

[0019] 3. During the process of lowering silt using the filtration grab bucket, the fixed seat and the movable seat move away from each other, causing the limiting plate to slide relative to the sleeve. The limiting plate guides the air in the sleeve through the exhaust pipe to the jet nozzle, which then sprays a high-speed airflow onto the filter plate. This effectively prevents the filter plate pores from being blocked, ensuring the continuous drainage efficiency and effect of the filter plate. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the external structure of the water-filtering grab bucket of the present invention;

[0022] Figure 3 For the present invention Figure 2 A partially enlarged structural diagram of section A in the middle;

[0023] Figure 4 This is a cross-sectional structural diagram of the fixing base of the present invention;

[0024] Figure 5 This is a schematic cross-sectional view of the water-filtering grab bucket of the present invention;

[0025] Figure 6 For the present invention Figure 5 A partially enlarged structural diagram of section B in the middle;

[0026] Figure 7 For the present invention Figure 5 The main view;

[0027] Figure 8 For the present invention Figure 7 A magnified schematic diagram of part C in the middle.

[0028] In the diagram: 1. Hull; 101. Support frame; 2. Winch mechanism; 201. First pull rope; 202. Second pull rope; 3. Fixed seat; 301. Groove; 4. Moving seat; 5. Rotating rod; 501. Drive gear; 5011. Main wheel body; 5012. Arc rack; 6. Filter grab bucket; 601. Grab bucket body; 6011. Movable groove; 6012. Torsion spring; 602. Filter plate; 603. Discharge... 7. Water tank; 8. Swing rod; 9. Top cover plate; 10. Outer plate; 11. Inner slide plate; 12. First elastic element; 13. Hydraulic cylinder; 14. Piston rod; 15. Lower pressure plate; 16. Guide rod; 17. Limiting plate; 18. Driven gear; 19. Rotating shaft; 10. Drum; 11. Third pull rope; 12. Sleeve; 13. Exhaust pipe; 14. Jet nozzle; 15. Guide wheel. Detailed Implementation

[0029] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0030] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0031] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0032] Example: Refer to Figure 1 , Figure 2 and Figure 4A grab dredger includes a hull 1, a support frame 101 at one end of the hull 1, a winch mechanism 2 at the end of the support frame 101 away from the hull 1, a first pull rope 201 and a second pull rope 202, a fixed seat 3 connected to the bottom of the first pull rope 201, a movable seat 4 connected to the bottom of the second pull rope 202, the movable seat 4 being located below the fixed seat 3, rotating rods 5 on both sides of the movable seat 4, each rotating rod 5 being connected to a water-filtering grab 6, a swing rod 7 being movably connected to the end of the water-filtering grab 6 away from the rotating rod 5, the end of the swing rod 7 being movably connected to the fixed seat 3, a squeezing assembly being provided on the movable seat 4, and an upper cover plate 8 being provided on each water-filtering grab 6.

[0033] Specifically, the hull 1 controls the winch mechanism 2, which is connected to the fixed seat 3 via the first pull rope 201 to achieve the lifting and lowering of the water-filtering grab bucket 6. The winch mechanism 2 is connected to the movable seat 4 via the second pull rope 202 to achieve the opening and closing of the water-filtering grab bucket 6. This is the existing dredging operation mode of the grab bucket dredger, which will not be elaborated here. When the water-filtering grab bucket 6 grabs silt, the upper cover plate 8 covers the upper side of the water-filtering grab bucket 6 to prevent the silt inside the water-filtering grab bucket 6 from falling, thus ensuring the silt grabbing effect. In addition, the water-filtering grab bucket 6 filters the silt during the grabbing and hoisting process. The squeezing component and the upper cover plate 8 work together to discharge the water in the silt, eliminating the need to collect seawater and silt together into the dredger, thereby improving the silt grabbing efficiency.

[0034] Reference Figure 1 , Figure 2 , Figure 4 , Figure 5 and Figure 7 As a preferred embodiment of the present invention, the water-filtering grab bucket 6 includes a grab bucket body 601 connected to the rotating rod 5. The inner side wall of the grab bucket body 601 is provided with a movable groove 6011. A filter plate 602 is connected to the movable groove 6011 by a pin. A torsion spring 6012 is sleeved on the pin, with its two ends connected to the filter plate 602 and the grab bucket body 601 respectively and used for the filter plate 602 to return to its rotation. The outer side wall of the grab bucket body 601 is provided with a drainage groove 603 that communicates with the movable groove 6011.

[0035] Furthermore, the extrusion assembly includes a hydraulic cylinder 9 fixed on the movable seat 4, the piston rod 901 of the hydraulic cylinder 9 is connected to the lower pressure plate 902, and the fixed seat 3 is provided with a groove 301 that cooperates with the hydraulic cylinder 9.

[0036] Specifically, after the two water-filtering grabs 6 on the lower side of the movable seat 4 rotate around the rotating rod 5 to grab the silt, the hydraulic cylinder 9 is controlled to operate. The piston rod 901 of the hydraulic cylinder 9 drives the lower pressure plate 902 to move down relative to the movable seat 4. The lower pressure plate 902 squeezes the silt grabbed in the water-filtering grab 6, so that the water in the silt passes through the filter holes of the filter plate 602 and enters the movable groove 6011, and is discharged from the water-filtering grab 6 along the drainage groove 603 on the lower side of the grab body 601. The seawater and silt need to be recycled together into the dredging vessel to ensure the silt grabbing effect and thus improve the silt grabbing efficiency.

[0037] Reference Figure 4 , Figure 5 and Figure 7 As a preferred embodiment of the present invention, the two ends of the upper cover plate 8 are rotatably connected to the water-filtering grab 6 and the lower pressure plate 902, respectively. The upper cover plate 8 includes an outer cover plate 801 rotatably connected to the grab body 601, an inner slide plate 802 rotatably connected to the lower pressure plate 902, and a first elastic element 803 disposed between the outer cover plate 801 and the inner slide plate 802. The inner slide plate 802 is slidably connected inside the outer cover plate 801.

[0038] Specifically, the upper cover plate 8 is movably positioned between the grab bucket body 601 and the lower pressure plate 902. It can block the upper side of the water-filtering grab bucket 6 to prevent the sludge inside the water-filtering grab bucket 6 from falling out, thus ensuring the sludge grabbing effect. When the lower pressure plate 902 squeezes the sludge inside the water-filtering grab bucket 6, the lower pressure plate 902 drives the upper cover plate 8 to deflect, causing the inner sliding plate 802 to slide into the outer outer plate 801. The first elastic element 803 is squeezed, allowing the upper cover plate 8 to simultaneously squeeze the sludge inside the water-filtering grab bucket 6, increasing the squeezing range and squeezing effect of the sludge inside the water-filtering grab bucket 6, and effectively draining the water from the sludge.

[0039] Reference Figure 2 , Figure 3 , Figure 5 and Figure 6 As a preferred embodiment of the present invention, a drive gear 501 is provided on the outer side of the rotating rod 5, and a driven gear 11 is meshed on the outer side of the drive gear 501. A rotating shaft 12 is rotatably connected between the driven gear 11 and the moving seat 4. A drum 121 is provided on the rotating shaft 12, and a third pull rope 122 is wound and connected on the drum 121. The end of the third pull rope 122 away from the drum 121 passes through the grab bucket body 601 and is connected to the filter plate 602.

[0040] Furthermore, the drive gear 501 includes a main gear body 5011 and an arc-shaped rack 5012 evenly arranged on the outer side of the main gear body 5011 in a circular pattern. The arc-shaped rack 5012 meshes with the driven gear 11, which is configured as a one-way gear.

[0041] Specifically, when the filter grabs 6 on both sides of the movable seat 4 rotate away from each other around the rotating rod 5 to lower the sludge, the rotation of the rotating rod 5 will drive the drive gear 501 to rotate. The drive gear 501 is equipped with multiple sets of equally spaced arc-shaped racks 5012, so that the drive gear 501 intermittently meshes with the driven gear 11 when it rotates. When the drive gear 501 meshes with the driven gear 11, the driven gear 11 causes the drum 121 to wind up the third pull rope 122 through the rotating shaft 12. The third pull rope 122 pulls the filter plate 602. When the drive gear 501 and the driven gear 11 are not meshed, the drum 121 no longer winds up the third pull rope 122, and the filter plate 602 is pulled by the rotating shaft torsion spring 6012. Under the action of automatic flipping and reset, as the drive gear 501 rotates, the drive gear 501 meshes with the driven gear 11 multiple times, causing the filter plate 602 to shake back and forth during the sludge discharge process. On the one hand, this avoids sludge residue on the inside of the filter plate 602, and on the other hand, it prevents the filter holes of the filter plate 602 from being blocked, ensuring the continuous drainage efficiency and drainage effect of the filter plate 602. It should be noted that the driven gear 11 is set as a one-way gear. One-way gears are existing technology. When the water-filtering grab bucket 6 rotates and closes around the rotating rod 5 to grab the sludge, the one-way gear will not drive the rotating shaft 12 to rotate, thus avoiding the third pull rope 122 pulling the filter plate 602 back and forth, which would affect the grabbing effect of the sludge.

[0042] Reference Figure 1 and Figure 2 As a preferred embodiment of the present invention, the first pull rope 201, the second pull rope 202 and the third pull rope 122 are all made of steel wire rope.

[0043] Specifically, the first pull rope 201, the second pull rope 202 and the third pull rope 122 are all made of steel wire rope, which can ensure the service life of the water filter grab 6 during operation.

[0044] Reference Figure 2 , Figure 4 and Figure 5 As a preferred embodiment of the present invention, a guide rod 10 is fixedly provided on the top of the movable seat 4, the fixed seat 3 slides on the outside of the guide rod 10, and a limit plate 1001 is provided on the top of the guide rod 10.

[0045] Specifically, when the winch mechanism 2 controls the water-filtering grab buckets 6 on both sides of the movable seat 4 to grab and lower the silt via the second pull rope 202, the movable seat 4 and the fixed seat 3 move relative to each other. When the movable seat 4 moves, it drives the guide rod 10 to slide within the fixed seat 3, thereby improving the stability of the movement of the movable seat 4. The limiting plate 1001 can limit the movement range of the movable seat 4.

[0046] Reference Figure 2 , Figure 5 , Figure 7 and Figure 8As a preferred embodiment of the present invention, the top of the fixed base 3 is provided with a sleeve 13 sleeved on the outside of the guide rod 10, the limiting plate 1001 is slidably connected inside the sleeve 13, the sleeve 13 is provided with an air inlet valve and an air outlet valve, the sleeve 13 is connected to an exhaust pipe 131 through the air outlet valve, the end of the exhaust pipe 131 away from the sleeve 13 is connected to the grab bucket body 601, and the inner wall of the movable groove 6011 of the grab bucket body 601 is provided with a jet nozzle 132 connected to the exhaust pipe 131.

[0047] Specifically, during the process of lowering the sludge into the filter grab bucket 6, the fixed seat 3 and the movable seat 4 move away from each other, causing the limiting plate 1001 to slide relative to the sleeve 13. The limiting plate 1001 guides the air in the sleeve 13 through the exhaust pipe 131 to the jet nozzle 132, so that the jet nozzle 132 sprays a high-speed airflow onto the filter plate 602, effectively preventing the filter holes of the filter plate 602 from being blocked, and ensuring the continuous drainage efficiency and drainage effect of the filter plate 602.

[0048] Reference Figure 2 , Figure 7 and Figure 8 As a preferred embodiment of the present invention, the grab body 601 is provided with a guide wheel 14 that is slidably disposed with the exhaust pipe 131; this prevents the exhaust pipe 131 from being worn and ensures the service life of the exhaust pipe 131.

[0049] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A grab dredger, comprising a hull (1), characterized in that, A support frame (101) is provided at the end of the hull (1). A winch mechanism (2) is provided at the end of the support frame (101) away from the hull (1). The winch mechanism (2) is provided with a first pull rope (201) and a second pull rope (202). A fixed seat (3) is connected to the bottom of the first pull rope (201). A movable seat (4) is connected to the bottom of the second pull rope (202). The movable seat (4) is placed below the fixed seat (3). Rotating rods (5) are provided on both sides of the movable seat (4). Each rotating rod (5) is connected to a water-filtering grab (6). A swing rod (7) is movably connected to the end of the water-filtering grab (6) away from the rotating rod (5). The end of the swing rod (7) away from the water-filtering grab (6) is movably connected to the fixed seat (3). An extrusion assembly is provided on the movable seat (4). An upper cover plate (8) is provided on each water-filtering grab (6). The water-filtering grab (6) includes a grab body (601) connected to a rotating rod (5). The inner side wall of the grab body (601) is provided with a movable groove (6011). A filter plate (602) is connected to the movable groove (6011) by a pin. A torsion spring (6012) is sleeved on the pin, with its two ends connected to the filter plate (602) and the grab body (601) respectively and used for the filter plate (602) to rotate back. A drainage groove (603) connected to the movable groove (6011) is provided on the outer side wall of the grab body (601). The extrusion assembly includes a hydraulic cylinder (9) fixed on a movable seat (4), the piston rod (901) of the hydraulic cylinder (9) is connected to a lower pressure plate (902), and the fixed seat (3) has a groove (301) that cooperates with the hydraulic cylinder (9). The two ends of the upper cover plate (8) are rotatably connected to the water-filtering grab (6) and the lower pressure plate (902) respectively. The upper cover plate (8) includes an outer cover plate (801) rotatably connected to the grab body (601), an inner slide plate (802) rotatably connected to the lower pressure plate (902), and a first elastic element (803) disposed between the outer cover plate (801) and the inner slide plate (802). The inner slide plate (802) is slidably connected inside the outer cover plate (801). A drive gear (501) is provided on the outside of the rotating rod (5). A driven gear (11) is meshed on the outside of the drive gear (501). A rotating shaft (12) is rotatably connected between the driven gear (11) and the moving seat (4). A drum (121) is provided on the rotating shaft (12). A third pull rope (122) is wound around the drum (121). The end of the third pull rope (122) away from the drum (121) passes through the grab body (601) and is connected to the filter plate (602).

2. The grab dredger according to claim 1, characterized in that, The drive gear (501) includes a main gear body (5011) and an arc-shaped rack (5012) evenly arranged on the outside of the main gear body (5011). The arc-shaped rack (5012) meshes with the driven gear (11), and the driven gear (11) is configured as a one-way gear.

3. A grab dredger according to claim 1, characterized in that, The first pull rope (201), the second pull rope (202) and the third pull rope (122) are all made of steel wire rope.

4. A grab dredger according to claim 1, characterized in that, The top of the movable seat (4) is fixedly provided with a guide rod (10), the fixed seat (3) slides on the outside of the guide rod (10), and the top of the guide rod (10) is provided with a limit plate (1001).

5. A grab dredger according to claim 4, characterized in that, The top of the fixed base (3) is provided with a sleeve (13) sleeved on the outside of the guide rod (10). The limiting plate (1001) is slidably connected inside the sleeve (13). An air inlet valve and an air outlet valve are provided on the sleeve (13). The sleeve (13) is connected to an exhaust pipe (131) through the exhaust valve. The end of the exhaust pipe (131) away from the sleeve (13) is connected to the grab body (601). The inner wall of the movable groove (6011) of the grab body (601) is provided with a jet nozzle (132) connected to the exhaust pipe (131).

6. A grab dredger according to claim 5, characterized in that, The grab body (601) is provided with a guide wheel (14) that is slidably disposed with the exhaust pipe (131).

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