Integrated dredging and dewatering treatment equipment for river bottom mud

Abstract

The present invention discloses an integrated dredging and dewatering treatment system for riverbed mud, including a supply unit base and a dewatering unit. The supply unit includes a storage tank, a supply pipe, and a screw conveyor installed within the storage tank. The dewatering unit includes a dewatering barrel, a plurality of pressurized filtration assemblies attached to the outer surface of the dewatering barrel, and a plurality of backflow mechanisms. The dewatering barrel is coaxially connected to the bottom of the storage tank. The dewatering barrel is equipped with an upper guide bucket, an upper dewatering mechanism, a lower guide bucket, and a lower dewatering mechanism, arranged in this order from top to bottom. The sidewall of the dewatering barrel is provided with a plurality of upper mud discharge ports corresponding to the upper dewatering mechanism and corresponding to the pressurized filtration assemblies in a one-to-one correspondence, and a plurality of lower mud discharge ports corresponding to the lower dewatering mechanism and corresponding to the backflow mechanisms in a one-to-one correspondence, evenly spaced around the circumference at the bottom. Drainage holes are provided at the bottom of the sidewall of the dewatering barrel, and the backflow mechanisms are connected to the pressurized filtration assemblies in a one-to-one correspondence via transport pipes. The present invention has high processing efficiency, low energy consumption and a high level of automation.

Description

[Technical Field]

[0001] The present invention relates to an integrated dredging and dewatering treatment device for river channel bottom mud. [Background technology]

[0002] River channels function as a medium for transporting water resources, and the impact of long-term water flow causes soil to move and accumulate in the channel. Large amounts of organic waste flow into river channels in daily life, and the portion that exceeds the water body's self-purification capacity is deposited at the bottom of the riverbed with a greater specific gravity and becomes part of the river channel's bottom sediment. If not properly treated, not only will the river channel's water storage capacity and flood resistance capacity decrease, but the water in the channel will turn black, emit a foul odor, and repeatedly deteriorate in water quality. Therefore, it is necessary to treat the river channel's bottom sediment by dredging and dewatering equipment.

[0003] Existing river sediment dredging and dewatering systems typically suction the sediment, use a centrifugal dewatering device to remove the water from the sediment, and then remove the dewatered sediment. This centrifugal dewatering method requires high rotation speeds, consumes a lot of energy, and can only process a limited amount of sediment at a time. The dewatered sediment has no fixed shape, making it unsuitable for subsequent storage, transportation, or reuse. Furthermore, the sediment after centrifugation must be manually cleaned before being dewatered again, resulting in low automation and inability to operate continuously, which increases the workload of workers and reduces the efficiency of river sediment treatment. Summary of the Invention [Problem to be solved by the invention]

[0004] The object of the present invention is to provide an integrated dredging and dewatering treatment device for riverbed sediment, which not only improves the treatment efficiency of riverbed sediment but also has a high level of automation, reduces the workload of workers, and cuts energy consumption, in order to solve the deficiencies of the prior art. [Means for solving the problem]

[0005] The object of the present invention is achieved as follows: An integrated dredging and dewatering treatment device for river channel sediment includes a base, a dewatering unit fixed to the top of the base, and a supply unit provided on the top of the dewatering unit, The supply unit includes a storage tank, a supply pipe connected to an upper portion of a side wall of the storage tank, and a screw conveyor provided within the storage tank; The dewatering unit includes a dewatering barrel, and a plurality of pressurized filtration assemblies and a plurality of backflow mechanisms attached to the outer surface of the dewatering barrel. The dewatering barrel is coaxially connected to the bottom of the storage tank. An upper guide bucket, an upper dewatering mechanism, a lower guide bucket, and a lower dewatering mechanism are arranged in this order from top to bottom within the dewatering barrel. A plurality of upper mud discharge ports are formed at an upper portion of the side wall of the dewatering barrel, corresponding to the upper dewatering mechanism and corresponding to the plurality of pressurized filtration assemblies in a one-to-one relationship. A plurality of lower mud discharge ports are formed at a lower portion of the side wall of the dewatering barrel, corresponding to the lower dewatering mechanism and corresponding to the plurality of backflow mechanisms in a one-to-one relationship, and a drain hole is formed at the lower portion of the side wall of the dewatering barrel. The plurality of backflow mechanisms are respectively connected to the plurality of pressurized filtration assemblies in a one-to-one relationship via transport pipes. The bottom mud passes through the supply unit and enters the dewatering unit. The bottom mud is preliminarily filtered and dewatered by the upper dewatering mechanism and then passes through the upper mud outlet into the pressurized filtration assembly, where it is compressed and dewatered again into blocks. The lower dewatering mechanism dewaters the bottom mud that has leaked out of the upper dewatering mechanism again, and the bottom mud filtered by the lower dewatering mechanism passes through the lower mud outlet and enters the backflow mechanism, where it is transported to the pressurized filtration assembly.

[0006] In the above-mentioned integrated dredging and dewatering treatment device for riverbed mud, the screw conveyor includes a first transmission shaft whose top passes through the top cover of the storage tank, a drive motor fixed to the top surface of the storage tank and connected to the first transmission shaft, and an auger blade attached to the first transmission shaft.

[0007] In the above-mentioned river channel bottom mud dredging and dewatering integrated treatment device, the upper dewatering mechanism includes a filtering bucket, a plurality of throwing assemblies, a cleaning assembly, and a drive assembly; The filtering bucket includes a circular top plate and a conical side wall connected to the edge of the top plate, the circular top plate having a central axial hole and two guide holes arranged symmetrically about the axial hole, the conical side wall having a plurality of sets of radial filtering holes, the lower part of the conical side wall having slot holes evenly spaced around the circumference, the slot holes corresponding to the plurality of upper mud discharge ports of the dewatering barrel in a one-to-one correspondence, and an arc-shaped rod passage hole at the center of the top of each slot hole; A plurality of throwing assemblies are provided in one-to-one correspondence with the plurality of slot holes, and each throwing assembly includes a storage tank, an arc-shaped rod, a first spring, an arc-shaped block, two push rods, and a stopper, the tank opening of the storage tank fits into the slot hole of the filter bucket, the arc-shaped rod is slidably inserted into the arc-shaped rod passing hole of the filter bucket, and the upper end of the arc-shaped rod is fixed to the center of the top end of the tank opening of the storage tank by a blocking plate, and the first spring is the stopper is hinged between both side walls of the upper mud discharge port, and the lower ends on both sides of the inner end surface of the stopper are hingedly connected to the other ends of the two push rods in a one-to-one correspondence; The cleaning assembly is provided inside the filter bucket and includes a second transmission shaft, a sleeve, a mounting plate, two guide rods, a plurality of cleaning arms, two wedge blocks, and a drive assembly. The second transmission shaft is inserted into an axial hole of the filter bucket and is coaxially connected to the lower end of the first transmission shaft of the screw conveyor. The sleeve is rotatably fitted onto the second transmission shaft. A plurality of guide grooves are formed in the sleeve wall along the circumference, evenly spaced in the axial direction. The tops of the guide grooves are connected to the upper ends of the second springs. A through hole whose inner diameter matches the outer diameter of the sleeve is formed in the center of the mounting plate. The through hole has a plurality of slots on the hole wall that correspond one-to-one to the plurality of guide grooves of the sleeve. the sliders are uniformly protruding, the mounting plate is slidably fitted onto the sleeve so that the sliders fit into the guide grooves in a one-to-one correspondence, and the top surfaces of the sliders are connected to the lower ends of the second springs; two guide rods are fixed to the top surface of the mounting plate symmetrically about the center and inserted into two guide holes in the filter bucket in a one-to-one correspondence; the number of the cleaning arms is the same as the number of sets of filter holes in the filter bucket; the cleaning arms are connected to the outer peripheral surface of the mounting plate like umbrella ribs, and a set of ejector pins is fixed to the outer surface of each cleaning arm, corresponding one-to-one to a set of filter holes in the filter bucket; and two wedge blocks are fixed to the bottom surface of the mounting plate symmetrically about the center; the driving assembly is disposed below the cleaning assembly and includes a mounting base, a ring gear, three small gears, a large gear, a plurality of driving arms, and two driving rods; the mounting base is fixedly connected to the inner wall of the dehydration barrel via two support rods; the ring gear is rotatably mounted on the top surface of the mounting base; the three small gears are evenly mounted on the top surface of the mounting base by respective rotation shafts and mesh with the ring gear; the large gear is fixedly fitted to the second transmission shaft and meshes with the three small gears; the number of driving arms is the same as the number of throwing assemblies; the plurality of driving arms are evenly connected to the outer periphery of the ring gear; a ball is fixed to the outer end of each driving arm, which contacts the bottom surface of a circular arc-shaped block at the bottom of the storage tank; and two driving rods are fixed to the top surface of the ring gear in a one-to-one correspondence with the two wedge blocks on the bottom surface of the mounting plate; The lower spin-drying mechanism and the upper spin-drying mechanism have the same structure.

[0008] In the above-mentioned integrated dredging and dewatering treatment device for riverbed mud, a plurality of partition plates are fixed radially to the conical side wall of the filter bucket, and guide plates are fixed to the conical side wall between both sides of the top of each slot hole and the side of the partition plate.

[0009] In the above-mentioned riverbed mud dredging and dewatering integrated treatment device, the pressure filtration assembly includes a pressure filtration chamber, a pressure filtration mechanism, and a sealing mechanism, The pressure filtering chamber is fixed to the outer surface of the dehydration barrel, and a supply port is opened in the upper part of the inner end wall of the pressure filtering chamber opposite the upper mud discharge port, a dehydration hole is opened in the lower part of the inner end wall of the pressure filtering chamber and communicates with the cavity of the dehydration barrel, and a backfeed hole is opened in the center of one side wall of the pressure filtering chamber, The pressure filtering mechanism includes a filter plate fixed to the lower part of the cavity of the pressure filtering chamber and located above the dewatering holes, a presser plate provided above the filter plate so as to be movable up and down, and a hydraulic cylinder fixed to the outer surface of the dewatering barrel, the piston rod of which penetrates the top wall of the pressure filtering chamber and is connected to the center of the top surface of the presser plate, The sealing mechanism includes two lateral slide grooves opened in a one-to-one correspondence in the central portions of the inner surfaces of both side walls of the pressure filtering chamber, two draw bars slidably connected to correspond one-to-one within the two lateral slide grooves, one push plate located within the cavity of the pressure filtering chamber and connected to the inner ends of the two draw bars, one seal door connected to the outer ends of the two draw bars, and one electric telescopic rod fixed to the bottom surface of the pressure filtering chamber and connected to the center of the outer end surface of the seal door via a transition rod.

[0010] In the above-mentioned integrated riverbed mud dredging and dewatering treatment device, the backflow mechanism includes a collection chamber, a transport pipe, a check valve, and a mud suction pump, the collection chamber is fixed to the outer surface of the dewatering barrel, a recovery port is opened at the upper part of the inner end wall of the collection chamber opposite the lower mud discharge port of the dewatering barrel, a feed hole is opened in the bottom wall of the collection chamber, the transport pipe is connected between the feed hole of the collection chamber and the pressurized filtration assembly, the check valve is provided in the transport pipe, and the mud suction pump is attached to the transport pipe and is close to the feed hole of the collection chamber. [Effects of the Invention]

[0011] The integrated dredging and dewatering treatment device for riverbed mud of the present invention has the following features.

[0012] 1. The installation of a pressure filter assembly allows the pre-filtered bottom mud that has entered the pressure filter chamber to be compressed again for dewatering. The bottom mud is compressed multiple times by the pressure filter assembly to form a block, and the formed mud cake can be scraped out of the pressure filter chamber using an electric telescopic rod. Because the bottom mud has a fixed shape, it is easy to store and transport, and the workload of workers is reduced. Furthermore, the conventional centrifugal dewatering method is eliminated, and primary dewatering is performed using the pressing force between the bottom mud, and secondary dewatering is performed using the pressure filter assembly. In addition, continuous operation is possible, the level of automation is high, work efficiency is greatly improved, and energy consumption is reduced because the drive motor operates at low speed.

[0013] 2. A cleaning assembly is provided inside the filtering bucket. The number of cleaning arms of the cleaning assembly is the same as the number of sets of filtering holes on the side wall of the filtering bucket. The positions of the ejector pins on the outer surface of each cleaning arm correspond one-to-one to the positions of each set of filtering holes. The outer diameter of the ejector pins is smaller than the inner diameter of the filtering holes, ensuring that the ejector pins can accurately enter the filtering holes and play a role in clearing blockages when inserted into the filtering holes. This keeps the filtering holes of the filtering bucket clean at all times and enables the filtering bucket to operate efficiently at all times.

[0014] 3. During the tank reversal process, the push rod and stopper are linked together to push the stopper, automatically reversing it upwards, allowing the preliminarily dewatered bottom mud to enter the pressurized filter assembly through the upper mud outlet. When the arc-shaped block at the bottom of the tank loses the pushing force of the ball at the outer end of the drive arm, the tank rebounds and resets due to the first spring, and the push rod is used to pull the stopper back to its original position, blocking the upper mud outlet, providing good conditions for the bottom mud to be dewatered again.

[0015] 4. By installing multiple partition plates on the outer surface of the filter bucket, the outer surface of the filter bucket is evenly divided into multiple areas, serving to guide the flow of bottom sediment, and the pre-dewatered bottom sediment is evenly distributed to each throwing assembly, facilitating the pressure filtration of the bottom sediment in the next process using the pressure filtration assembly. When the storage tank is inverted and throwing the mud, the bottom sediment that "leaks" through the gaps in the tank holes can be dewatered again by the lower dewatering mechanism, thereby ensuring the dewatering effect of the riverbed bottom sediment.

[0016] 5. The ring gear, pinion, and gear are provided to slow down the rotation of the ring gear, reducing the frequency with which the ball at the outer end of the drive arm drives the storage tank to discharge material. This allows the bottom mud to remain in the dewatering barrel for a longer period of time, squeezing out as much water as possible from the bottom mud, which is useful for the subsequent pressure filtration of the bottom mud.

[0017] 6. Multiple mud outlets are evenly spaced around the circumference of the dewatering barrel, each corresponding to the inlet of one of the pressure filter chambers. The storage tank is rotatably connected to the slotted holes, so that when the arc-shaped block is pressed by the ball, it pushes and inverts the storage tank, allowing the mud stored in the storage tank to enter the pressure filter chamber through the mud outlet and inlet. A stopper is rotatably connected to the mud outlet. While the mud is being sucked into the dewatering barrel, the stopper prevents the mud from leaking out. The downward force exerted by the screw conveyor of the supply unit on the mud increases the pressure of the mud at the top of the filter bucket, thereby increasing the dewatering intensity of the riverbed mud, improving dewatering efficiency, and shortening the time required for the subsequent pressure filter operation. [Brief explanation of the drawings]

[0018] [Figure 1] 1 is a perspective view of the exterior of an integrated dredging and dewatering treatment device for riverbed mud according to the present invention. [Figure 2] 1 is an axial cross-sectional view of an integrated dredging and dewatering treatment device for riverbed mud according to the present invention. FIG. [Figure 3] FIG. 2 is an exploded perspective view of an upper spin-drying mechanism according to the present invention. [Figure 4] FIG. 2 is a top view of the three-dimensional structure of the upper dewatering mechanism according to the present invention. [Figure 5] FIG. 2 is a three-dimensional structural view of the throwing assembly of the present invention. [Figure 6] FIG. 2 is a three-dimensional structural view of a cleaning assembly according to the present invention. [Figure 7] FIG. 7 is an enlarged view of part C in FIG. [Figure 8] FIG. 5 is an enlarged view of part B in FIG. [Figure 9] FIG. 2 is a three-dimensional structural view of a drive assembly according to the present invention. [Figure 10] FIG. 10 is an enlarged view of part D in FIG. [Figure 11] 1 is a schematic diagram of the three-dimensional structure of a pressure filtration assembly according to the present invention. [Figure 12] FIG. 2 is an enlarged view of part A in FIG. [Figure 13] FIG. 1 is a three-dimensional structural view of a reflux mechanism according to the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0019] The present invention will now be further described with reference to the drawings.

[0020] Referring to Figures 1 to 13, the integrated dredging and dewatering treatment device for riverbed mud of the present invention includes a base 1, a dewatering unit 2 fixed to the top of the base 1, and a supply unit 3 provided on the top of the dewatering unit 2.

[0021] The supply unit 3 includes a storage tank 31, a supply pipe 32 connected to the upper part of the side wall of the storage tank 31, and a screw conveyor provided within the storage tank 31, and the screw conveyor includes a first transmission shaft 34 whose top passes through the top cover of the storage tank 31, a drive motor 33 fixed to the top surface of the storage tank 31 and connected to the first transmission shaft 34, and an auger blade 35 attached to the first transmission shaft 34.

[0022] The dewatering unit 2 includes a dewatering barrel 20 , a plurality of pressurized filtration assemblies 8 , and a plurality of backflow mechanisms 9 .

[0023] The dewatering barrel 20 is coaxially connected to the bottom of the storage tank 31, and within the dewatering barrel 20, the upper guide bucket 21, upper dewatering mechanism 4, lower guide bucket 22, and lower dewatering mechanism 5 are arranged in this order from top to bottom, and on both the upper and lower sides of the side wall of the dewatering barrel 20, a plurality of upper mud discharge ports 6 corresponding to the upper dewatering mechanism 4 and a plurality of lower mud discharge ports 7 corresponding to the lower dewatering mechanism 5 are evenly arranged around the circumference, and drainage holes 23 are opened in the lower part of the side wall of the dewatering barrel 20.

[0024] In this embodiment, the number of upper mud discharge ports 6 and the number of lower mud discharge ports 7 are each four, and accordingly, the number of pressurized filter assemblies 8 and the number of backflow mechanisms 9 are each four.

[0025] The upper spin-drying mechanism 4 includes a filtering bucket 41 , four throwing assemblies 45 , a cleaning assembly 46 , and a drive assembly 469 .

[0026] The filter bucket 41 includes a circular top plate and a conical side wall connected to the edge of the top plate. The circular top plate has a central axial hole and two guide holes positioned symmetrically around the axial hole. The conical side wall has four rectangular slot holes 43 evenly spaced around the circumference, corresponding one-to-one to the four upper mud discharge ports 6 of the dewatering barrel 20. An umbrella-rib-shaped partition plate 42 is fixed to the middle of each pair of adjacent slot holes 43 on the conical side wall. Guide plates 44 are fixed between the sides of the partition plate 42 on both sides of the top of each slot hole 43. An arc-shaped rod passage hole 412 is opened midway between the top of each slot hole 43. Multiple sets of filter holes 411 are opened radially on the conical side wall between each pair of partition plates 42.

[0027] The four throwing assemblies 45 are provided in one-to-one correspondence with the four slotted holes 43, and each throwing assembly 45 includes a storage tank 451, an arc-shaped rod 453, a first spring 454, an arc-shaped block 452, two push rods 455, and a stopper 456. The storage tank 451 is a semi-cylindrical tank, and the shape and size of the tank opening of the storage tank 451 match the shape and size of the slotted hole 43. The arc-shaped rod 453 is inserted into the arc-shaped rod passing hole 412 of the filtering bucket 41, and the upper end of the arc-shaped rod 453 is fixed to the center of the top end of the tank opening of the storage tank 451 by a blocking plate 4531, and a spring seat 4532 is provided at the lower end of the arc-shaped rod 453. The first spring 454 is fitted onto the arc-shaped rod 453 and is located between the conical side wall of the filter bucket 41 and the spring seat 4532, so that the tank body of the storage tank 451 is located inside the filter bucket 41 and the tank opening closes the slot hole 43 of the filter bucket 41. The arc-shaped block 452 is fixed to the bottom of the storage tank 451. One ends of two push rods 455 are hingedly connected to the upper parts of both sides of the tank opening of the storage tank 451 in a one-to-one correspondence, and a stopper 456 is hingedly connected between both side walls of the upper mud discharge port 6, and both lower parts of the inner end surface of the stopper 456 are hingedly connected to the other ends of the two push rods 455 in a one-to-one correspondence.

[0028] The cleaning assembly 46 is provided inside the filter bucket 41 and includes a second transmission shaft 461, a sleeve 462, a mounting plate 464, two guide rods 466, a plurality of cleaning arms 467, two wedge blocks 468, and a drive assembly. The second transmission shaft 461 is inserted into a shaft hole in the circular top plate of the filter bucket 41 and is coaxially connected to the lower end of the first transmission shaft 34. The sleeve 462 is rotatably fitted onto the second transmission shaft 461. The side wall of the sleeve 462 has four guide grooves 463 that are evenly spaced axially along the circumference. The mounting plate 464 is provided with a through hole in the center thereof, the inner diameter of which matches the outer diameter of the sleeve 462, and four sliders are evenly protruding from the wall of the through hole, corresponding one-to-one to the four guide grooves 463 of the sleeve 462. The mounting plate 464 is slidably fitted onto the sleeve 462 so that the four sliders fit into the four guide grooves 463 in a one-to-one correspondence, and the top surfaces of the four sliders are connected to the lower ends of the four second springs 465 in a one-to-one correspondence. Two guide rods 466 are fixed to the top surface of the mounting plate 464 symmetrically about the center, and are inserted into two guide holes in the circular top plate of the filtering bucket 41 in a one-to-one correspondence. The number of cleaning arms 467 is the same as the number of sets of filtering holes 411 in the filter bucket 41, and the cleaning arms 467 are connected to the outer circumferential surface of the mounting plate 464 like the ribs of an umbrella. A set of ejector pins corresponding one-to-one to a set of filtering holes 411 in the filter bucket 41 is fixed to the outer surface of each cleaning arm 467, and two wedge blocks 468 are fixed symmetrically about the center to the bottom surface of the mounting plate 464. The fitting of the slider of the mounting plate 464 with the guide groove 463 of the sleeve 462 ensures that the cleaning arm 467 can move up and down stably.

[0029] The drive assembly 469 is provided below the cleaning assembly 46 and includes a mounting base 4691, a ring gear 4692, three small gears 4693, a large gear 4696, four drive arms 4694, and two drive rods 4697, and the mounting base 4691 is fixedly connected to the inner wall of the dehydration barrel 20 by two support rods 4690, and the ring gear 4692 is rotatably mounted in an annular groove opened in the top surface of the mounting base 4691 via a rotating ring coaxially connected to the bottom. The three small gears 4693 are each evenly attached to the top surface of the mounting base 4691 by a rotating shaft and mesh with the ring gear 4692, the large gear 4696 is fixedly fitted to the second transmission shaft 461 and each meshes with the three small gears 4693, the four drive arms 4694 are evenly connected to the outer surface of the ring gear 4692, and a ball 4695 is fixed to the outer end of each drive arm 4694, which contacts the bottom surface of the arc-shaped block 452 at the bottom of the storage tank 451, and two drive rods 4697 are fixed to the top surface of the ring gear 4692 so as to correspond one-to-one to the two wedge blocks 468 on the bottom surface of the mounting plate 464.

[0030] The lower spin-drying mechanism 5 and the upper spin-drying mechanism 4 have the same structure.

[0031] The four pressure filtration assemblies 8 and the four upper mud discharge ports 6 are attached to the outer surface of the dewatering barrel 20 in a one-to-one correspondence, and each pressure filtration assembly includes a pressure filtration chamber 81, a pressure filtration mechanism, and a sealing mechanism; The pressure filtering chamber 81 is fixed to the outer surface of the dehydration barrel 20, and a supply port 83 is provided at the upper part of the inner end wall of the pressure filtering chamber 81, facing the upper mud discharge port 6 of the dehydration barrel 20. A dehydration hole 811 communicating with the cavity of the dehydration barrel 20 is opened at the lower part of the inner end wall of the pressure filtering chamber 81, and a backfeed hole 812 is opened at the center of one side wall of the pressure filtering chamber 81. The pressure filtering mechanism includes a filter plate 84 fixed to the lower part of the cavity of the pressure filtering chamber 81 and located above the dewatering holes 811, a presser plate 88 provided above the filter plate 84 so as to be movable up and down, and a hydraulic cylinder 89 fixed to the outer surface of the dewatering barrel 20, the piston rod of which penetrates the top wall of the pressure filtering chamber 81 and is connected to the center of the top surface of the presser plate 88, The sealing mechanism includes two lateral slide grooves (not shown) opened in a one-to-one correspondence in the central parts of the inner surfaces of the two side walls of the pressure filtering chamber 81, two draw bars 85 slidably connected to correspond one-to-one within the two lateral slide grooves, one push plate 86 located within the cavity of the pressure filtering chamber 81 and connected to the inner ends of the two draw bars 85, one seal door 87 connected to the outer ends of the two draw bars 85, and an electric telescopic rod 82 fixed to the bottom surface of the pressure filtering chamber 81 and connected to the center of the outer end surface of the seal door 87 via a transition rod 820.

[0032] The four backflow mechanisms 9 are attached to the outer surface of the dehydration barrel 20 in one-to-one correspondence with the four lower mud discharge ports 7. Each backflow mechanism includes a collection chamber 91, a transport pipe 93, a check valve 94, and a mud suction pump 95. The collection chamber 91 is fixed to the outer surface of the dehydration barrel 20. A recovery port 92 is opened at the upper part of the inner end wall of the collection chamber 91, facing the lower mud discharge port 7 of the dehydration barrel 20. A feed hole is opened in the bottom wall of the collection chamber 91. The transport pipe 93 is connected between the feed hole of the collection chamber 91 and the backfeed hole 812 of the pressure filtration chamber 81. The check valve 94 is attached to the transport pipe 93. The mud suction pump 95 is attached to the transport pipe 93 and is close to the feed hole of the collection chamber 91.

[0033] In the integrated dredging and dewatering treatment device for riverbed mud of the present invention, the bottom mud passes through the supply unit 3 and enters the dewatering unit 2, and the bottom mud that has been preliminarily filtered and dewatered by the upper dewatering mechanism 4 passes through the upper mud discharge outlet 6 and enters the pressurized filtration assembly 8, where it is compressed and dewatered again to form blocks.The lower dewatering mechanism 5 dewaters again the bottom mud that has leaked from the upper dewatering mechanism 4, and the bottom mud that has been filtered by the lower dewatering mechanism 5 passes through the lower mud discharge outlet 7 and enters the backflow mechanism 9, where it is transported to the pressurized filtration assembly 8.

[0034] The operation of the integrated dredging and dewatering treatment device for riverbed mud according to the present invention includes the following steps.

[0035] River channel dredging step: The integrated dredging and dewatering treatment device for river channel mud according to the present invention is attached to a dredger ship using the base 1, and the mud is sucked into the supply unit 3 using a bottom mud suction pump, and the mud is then fed into the storage tank 31 via the supply pipe 32. The drive motor 33 rotates the first transmission shaft 34 and the second transmission shaft 461, which in turn drives the auger blade 35 to push the mud downward and transport it into the dewatering barrel 20 of the dewatering unit 2. The rotation speed of the drive motor 33 is 6 r / min.

[0036] Preliminary dewatering: The riverbed mud falls through the upper guide bucket 21 onto the outer surface of the conical sidewall of the filter bucket 41 of the upper dewatering mechanism 4 in the dewatering barrel 20 due to the dual action of gravity and gravity from the screw conveyor of the supply unit 3. As the mud is pushed by the screw conveyor, some of the moisture inside flows through the filter holes 411 of the filter bucket 41 to the bottom of the dewatering barrel 20 under pressure. The four partition plates 42 divide the outer surface of the conical sidewall of the filter bucket 41 into four equal-area regions, distributing the mud among the four regions. The guide plate 44 guides the mud on the outer surface of the conical sidewall of the filter bucket 41 into the four slot holes 43 and into the storage tank 451. When the throwing assembly 45 is not driven by an external force, the stopper 456 blocks the upper mud discharge port 6, allowing the mud to be temporarily stored in the four storage tanks 451. The second transmission shaft 461 rotates the four drive arms 4694 downwardly in one-to-one correspondence with the four storage tanks 451 via the large gear 4696, the small gear 4693, and the ring gear 4692 in that order, and the ball 4695 at the outer end of each drive arm 4694 pushes upward against the arc-shaped block 452 at the bottom of the corresponding storage tank 451, causing the storage tank 451 to invert outward against the pressure of the first spring 454. During the inversion of the storage tank 451, the stopper 456 is pushed by the two push rods 455 and spontaneously inverts outward and upward, opening the upper mud discharge port 6, so that the preliminarily dewatered bottom mud enters the pressurized filter assembly 8 through the upper mud discharge port 6.When the arc-shaped block 452 loses the pushing force of the ball 4695, the storage tank 451 is reset by rebounding due to the first spring 454, and the two push rods 455 pull the stopper 456 back to its original position again to block the upper mud discharge port 6. At the same time, the top ends of the two drive rods 4697, which rotate in synchronization with the drive arm 4694, push up the two wedge blocks 468 on the bottom surface of the mounting plate 464 in a one-to-one correspondence, thereby The mounting plate 464 moves upward along the outer surface of the sleeve 462 against the pressure of the four second springs 465, and when the drive rod 4697 pushes the mounting plate 464 to its upper limit position, the ejector pins of the cleaning arms 467 fixed to the outer circumferential surface of the mounting plate 464 are inserted into the sets of filter holes 411 in the conical side wall of the filter bucket 41 in a one-to-one correspondence, thereby serving to unclog the filter holes 411. When the two drive rods 4697 are released from the two wedge blocks 468, the four second springs 465 repel the mounting plate 464 to reset it, and the ejector pins of the cleaning arms 467 are released from the sets of filter holes 411 in a one-to-one correspondence.

[0037] Secondary dewatering step: After the preliminarily dewatered bottom mud enters the pressurized filtration assembly 8 through the upper mud outlet 6, the controller controls the piston rod of the hydraulic cylinder 89 to extend downward once every two minutes, so that the pressure plate 88 holds the bottom mud for one minute, and the piston rod of the hydraulic cylinder 89 extends and retracts for half a minute each. The bottom mud that has entered the pressurized filtration chamber 81 is squeezed repeatedly by the pressure plate 88, further squeezing out the water from the bottom mud and forming it into a block. The squeezed water is then discharged into the dewatering barrel 20 through the dewatering hole 811 on the inner end wall of the pressurized filtration chamber 81. Then, the electric telescopic rod 82 opens the seal door 87 of the pressurized filtration chamber 81, and at the same time, the push plate 86 removes the formed mud cake from the pressurized filtration chamber 81. During the inversion of the storage tank 451 of the upper dewatering mechanism 4, the bottom mud that leaks out through the gaps in the slot holes 43 enters the lower dewatering mechanism 5 from the lower guide bucket 22 in the dewatering barrel 20, is filtered in the lower dewatering mechanism 5, and then enters the collection chamber 91 through the lower mud discharge port 7 of the dewatering barrel 20 and the recovery port 92 of the collection chamber 91, and the mud is sucked into the pressurized filtration assembly 8 by the mud suction pump 95. The check valve 94 only allows the mud to enter the pressurized filtration assembly 8 through the collection chamber 91, ensuring that the mud does not flow back into the collection chamber 91 when the pressurized filtration assembly 8 is operating.

[0038] The drive arm 4694 rotates once every four minutes, and when the ball 4695 at the outer end of the drive arm 4694 presses the arc-shaped block 452 at the bottom of the storage tank 451, the hydraulic cylinder 89 in the pressurized filtration assembly 8 has just finished its squeezing operation, and the pressure plate 88 has already risen to the top of the pressurized filtration chamber 81, so it does not interfere with the outward reversal of the stopper 456.

[0039] The provision of the ring gear 4692, small gear 4693, and large gear 4696 slows down the rotation of the ring gear 4692, reducing the frequency with which the ball 4695 at the outer end of the drive arm 4694 drives the throwing assembly 45 to discharge material, thereby allowing the bottom mud to remain in the dewatering barrel 20 for a longer period of time and squeezing out as much water as possible from the bottom mud, which is useful for the subsequent pressure filtration operation of the pressure filtration assembly 8.

[0040] The above examples are for the purpose of illustrating the present invention, but are not intended to limit the present invention. Those skilled in the art may make various modifications or variations without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions belong to the scope of the present invention, which should be defined by the claims.

Claims

1. A dredging and dewatering integrated treatment device for river channel sediment, comprising: a base; a dewatering unit fixed to the top of the base; and a supply unit provided on the top of the dewatering unit, The supply unit includes a storage tank, a supply pipe connected to an upper portion of a side wall of the storage tank, and a screw conveyor provided within the storage tank; The dewatering unit includes a dewatering barrel, and a plurality of pressurized filtration assemblies and a plurality of backflow mechanisms attached to the outer surface of the dewatering barrel. The dewatering barrel is coaxially connected to the bottom surface of the storage tank. An upper guide bucket, an upper dewatering mechanism, a lower guide bucket, and a lower dewatering mechanism are arranged in this order from top to bottom within the dewatering barrel. A plurality of upper mud discharge ports are formed at an upper portion of the side wall of the dewatering barrel, corresponding to the upper dewatering mechanism and corresponding to the plurality of pressurized filtration assemblies in a one-to-one relationship. A plurality of lower mud discharge ports are formed at a lower portion of the side wall of the dewatering barrel, corresponding to the lower dewatering mechanism and corresponding to the plurality of backflow mechanisms in a one-to-one relationship. Drainage holes are formed at the lower portion of the side wall of the dewatering barrel. The plurality of backflow mechanisms are respectively connected to the plurality of pressurized filtration assemblies in a one-to-one relationship via transport pipes. This integrated river channel dredging and dewatering treatment device is characterized in that bottom mud passes through a supply unit and enters a dewatering unit, the bottom mud is preliminarily filtered and dewatered by an upper dewatering mechanism and enters a pressurized filtration assembly through an upper mud discharge outlet, where it is compressed and dewatered again by the pressurized filtration assembly to form blocks, the lower dewatering mechanism dewaters again the bottom mud that has leaked from the upper dewatering mechanism, and the bottom mud that has been filtered by the lower dewatering mechanism passes through a lower mud discharge outlet and is transported to the pressurized filtration assembly by the backflow mechanism.

2. 2. The integrated dredging and dewatering treatment device for riverbed mud described in claim 1, characterized in that the screw conveyor includes a first transmission shaft whose top passes through the top cover of the storage tank, a drive motor fixed to the top surface of the storage tank and connected to the first transmission shaft, and an auger blade attached to the first transmission shaft.

3. the upper spin-drying mechanism includes a filter bucket, a plurality of throwing assemblies, a cleaning assembly, and a drive assembly; The filtering bucket includes a circular top plate and a conical side wall connected to the edge of the top plate, the circular top plate having a central axial hole and two guide holes positioned symmetrically around the axial hole, the conical side wall having a plurality of sets of radial filtering holes, a lower part of the conical side wall having slot holes evenly spaced around the circumference, the slot holes corresponding one-to-one to the plurality of upper mud discharge ports of the dewatering barrel, and an arc-shaped rod passage hole at the center of the top of each slot hole; A plurality of throwing assemblies are provided in one-to-one correspondence with the plurality of slot holes, and each throwing assembly includes a storage tank, an arc-shaped rod, a first spring, an arc-shaped block, two push rods, and a stopper. The tank opening of the storage tank is fitted to the slot hole of the filter bucket, and the arc-shaped rod is slidably inserted into the arc-shaped rod passage hole of the filter bucket. The upper end of the arc-shaped rod is fixed to the center of the top end of the tank opening of the storage tank by a blocking plate, and the first spring is , fitted into the arc-shaped rod located inside the filter bucket, so that the tank opening of the storage tank closes the slot hole of the filter bucket, the arc-shaped block is fixed to the bottom of the storage tank, one end of the two push rods is hingedly connected to the upper part of both sides of the tank opening of the storage tank in a one-to-one correspondence, the stopper is hingedly connected between both side walls of the upper mud discharge port, and both lower parts of the inner end surface of the stopper are hingedly connected to the other ends of the two push rods in a one-to-one correspondence, The cleaning assembly is provided inside the filter bucket and includes a second transmission shaft, a sleeve, a mounting plate, two guide rods, a plurality of cleaning arms, two wedge blocks, and a drive assembly. The second transmission shaft is inserted into an axial hole of the filter bucket and is coaxially connected to the lower end of the first transmission shaft of the screw conveyor. The sleeve is rotatably fitted onto the second transmission shaft. A plurality of guide grooves are formed in the sleeve wall along the circumference, evenly spaced in the axial direction. The tops of the guide grooves are connected to the upper ends of the second springs. A through hole whose inner diameter matches the outer diameter of the sleeve is formed in the center of the mounting plate. The through hole has a plurality of slots on the hole wall that correspond one-to-one to the plurality of guide grooves of the sleeve. the sliders are uniformly protruding, the mounting plate is slidably fitted onto the sleeve so that the sliders fit into the guide grooves in a one-to-one correspondence, and the top surfaces of the sliders are connected to the lower ends of the second springs; two guide rods are fixed to the top surface of the mounting plate symmetrically around the center and inserted into two guide holes in the filter bucket in a one-to-one correspondence; the number of the cleaning arms is the same as the number of sets of filter holes in the filter bucket; the cleaning arms are connected to the outer peripheral surface of the mounting plate like umbrella ribs, and a set of ejector pins is fixed to the outer surface of each cleaning arm, corresponding one-to-one to a set of filter holes in the filter bucket; and two wedge blocks are fixed to the bottom surface of the mounting plate symmetrically around the center; the drive assembly is disposed below the cleaning assembly and includes a mounting base, a ring gear, three small gears, a large gear, a plurality of drive arms, and two drive rods; the mounting base is fixedly connected to the inner wall of the dehydration barrel via two support rods; the ring gear is rotatably mounted on the top surface of the mounting base; the three small gears are evenly mounted on the top surface of the mounting base by respective rotation shafts and mesh with the ring gear; the large gear is fixedly fitted to the second transmission shaft and meshes with the three small gears, respectively; the number of drive arms is the same as the number of throwing assemblies; the plurality of drive arms are evenly connected to the outer periphery of the ring gear; a ball is fixed to the outer end of each drive arm, which contacts the bottom surface of a circular block at the bottom of the storage tank; and two drive rods are fixed to the top surface of the ring gear in a one-to-one correspondence with the two wedge blocks on the bottom surface of the mounting plate; 2. The integrated dredging and dewatering treatment device for riverbed mud according to claim 1, wherein the lower dewatering mechanism and the upper dewatering mechanism have the same structure.

4. The integrated dredging and dewatering treatment device for riverbed mud as described in claim 3, characterized in that a plurality of partition plates are fixed radially to the conical side wall of the filtering bucket, and guide plates are fixed to the conical side wall between both sides of the top of each slot hole and the side of the partition plate.

5. The pressurized filtration assembly includes a pressurized filtration chamber, a pressurized filtration mechanism, and a sealing mechanism; The pressure filtering chamber is fixed to the outer surface of the dehydration barrel, a supply port is opened in the upper part of the inner end wall of the pressure filtering chamber opposite the upper mud discharge port, a dehydration hole is opened in the lower part of the inner end wall of the pressure filtering chamber communicating with the cavity of the dehydration barrel, and a backfeed hole is opened in the center of one side wall of the pressure filtering chamber, The pressure filtering mechanism includes a filter plate fixed to the lower part of the cavity of the pressure filtering chamber and located above the dewatering holes, a presser plate provided above the filter plate so as to be movable up and down, and a hydraulic cylinder fixed to the outer surface of the dewatering barrel, the piston rod of which penetrates the top wall of the pressure filtering chamber and is connected to the center of the top surface of the presser plate, 2. The integrated dredging and dewatering treatment device for riverbed mud according to claim 1, wherein the sealing mechanism comprises: two lateral slide grooves opened in a one-to-one correspondence at the centers of the inner surfaces of both side walls of the pressure filtering chamber; two draw bars slidably connected to the two lateral slide grooves in a one-to-one correspondence within the two lateral slide grooves; one push plate located in the cavity of the pressure filtering chamber and connected to the inner ends of the two draw bars; one seal door connected to the outer ends of the two draw bars; and one electric telescopic rod fixed to the bottom surface of the pressure filtering chamber and connected to the center of the outer end surface of the seal door via a transition rod.

6. 2. The integrated dredging and dewatering treatment device for riverbed mud according to claim 1, wherein the backflow mechanism includes a collection chamber, a transport pipe, a check valve, and a mud suction pump, the collection chamber is fixed to the outer surface of the dewatering barrel, a recovery port is opened at the upper part of the inner end wall of the collection chamber opposite the lower mud discharge port of the dewatering barrel, a feed hole is opened in the bottom wall of the collection chamber, the transport pipe is connected between the feed hole of the collection chamber and the pressurized filtration assembly, the check valve is attached to the transport pipe, and the mud suction pump is attached to the transport pipe and is close to the feed hole of the collection chamber.

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