CN111894069A - Underwater environment-friendly cutter suction type dredging device for urban ecological river and construction method thereof - Google Patents

Abstract

The invention discloses a river channel dredging device and a construction method utilizing the same. The water collecting device is matched with the water suction pipe, an external underwater pipeline, an external water pipeline and an external land pipeline, cut aquatic weeds, duckweeds and the like are discharged to the outside, water is conveyed to the original position after being filtered, the collecting efficiency of the cut aquatic weeds and the duckweeds is improved through the fishing net, and the water collecting device not only can be used for dredging, but also can be used for removing the aquatic weeds, the duckweeds and the like, so that the utilization rate of resources is improved, and the practicability is enhanced.

Description

Underwater environment-friendly cutter suction type dredging device for urban ecological river and construction method thereof

Technical Field

The invention belongs to the technical field of design of environmental protection facility equipment and a sewage disposal process, and particularly discloses an underwater environment-friendly cutter suction type dredging device for an urban ecological river and a construction method thereof.

Background

In the river dredging engineering, a ship is usually used as power, a motor drives a reamer to stir sludge, and a sludge pump and a water suction pipe are matched with an underwater pipeline, an overwater pipeline and a land pipeline to suck a sludge-water mixture and discharge the sludge-water mixture into a sludge collection tank, so that the construction can be carried out in rainy days, and the flow cutting is not needed. At present, a device function singleness for the river course desilting only is used for the desilting of river course, and the practicality is lower, and this river course desilting device is in idle state usually after carrying out the desilting to the river course moreover, has caused the waste of resource. Therefore, the river channel dredging device is improved, and the device is used for carrying out significant design improvement on the existing construction method.

Disclosure of Invention

In order to overcome the defects in the prior art, the invention provides a river channel dredging device and an improved dredging construction method.

In order to solve the technical problems, the invention provides the following technical scheme:

the river channel dredging device comprises a ship body and a water suction pipe, wherein a connecting piece is fixedly arranged at the top of one side of the ship body, the top end of the water suction pipe is communicated with a connecting pipe, the connecting pipe is connected with the connecting piece through a limiting mechanism, a motor is arranged at the top of the connecting pipe, a plurality of connecting rods are fixedly arranged at the bottom of the motor in an equal distance mode, the bottom end of each connecting rod is fixedly connected with the top end of the connecting pipe, a stirring head is fixedly arranged on an output shaft of the motor, a fixed seat is fixedly arranged on one side of the top end of the ship body and is close to the connecting piece, the fixed seat is connected with a semicircular fishing piece through a movable mechanism, a through hole is formed in the semicircular fishing piece, the semicircular fishing piece is arranged in an inclined mode and is right opposite to the part, between the stirring head, the four positioning mechanisms are positioned at the upper, lower, left and right parts of the fishing net, a transmission mechanism used for pulling the motor and the semicircular fishing piece is arranged at one side of the top end of the ship body and the part close to the fixed seat, the transmission mechanism comprises a U-shaped fixed plate, the U-shaped fixed plate is fixedly arranged at the top end of the ship body, a stepping motor is fixedly arranged at one end of one side of the U-shaped fixed plate, an output shaft of the stepping motor penetrates through the U-shaped fixed plate and is fixedly provided with a rectangular block, a first limiting rod is fixedly arranged at the middle part of the bottom end of the other side of the U-shaped fixed plate, a first dovetail sliding groove is arranged at the top end of the first limiting rod and is in sliding connection with a first dovetail sliding block, a second limiting rod is fixedly arranged at the top end of the first dovetail sliding block, a second dovetail sliding block is arranged at the top end of, the fixed limiting plate that is equipped with in top of second forked tail slider, the both sides of limiting plate all inlay and are equipped with first bearing, the fixed roller that is equipped with of inner circle of first bearing, the middle part of roller sets up for sunken, and one side of roller open be equipped with rectangular block assorted rectangular channel, two the depressed part of roller all fixes and is equipped with the rope body, and the one end of two rope bodies respectively with one side of motor and the top fixed connection of semi-circular salvage piece one side, one side of first gag lever post is inlayed and is equipped with first spring catch, and one side of first forked tail slider set up with first spring catch assorted first jack, one side of second gag lever post is inlayed and is equipped with the second spring catch, and the both ends of a second forked tail slider avris all set up with second spring catch assorted second jack, the second jack is just to first bearing.

As a preferred technical scheme of the invention, the limiting mechanism comprises two convex blocks, a first open slot matched with the connecting pipe is formed in the middle of one side of the connecting piece, second open slots matched with the convex blocks are formed in two sides of the first open slot, and the two convex blocks are respectively and fixedly connected with the middle of two sides of the connecting pipe.

As a preferred technical scheme of the present invention, first rotating shafts are fixedly arranged on both sides of the second open groove, a connecting block is inserted in the first rotating shafts, a third spring pin is embedded in the top end of the connecting block, one end of the third spring pin is inserted in and connected with the protruding block, and a round head is inserted and fixed in the top end of the first rotating shaft.

As a preferable technical scheme of the invention, the movable mechanism comprises a second bearing, a second rotating shaft is fixedly arranged on an inner ring of the second bearing, a U-shaped part is fixedly arranged at the top end of the second rotating shaft, and a third rotating shaft is fixedly arranged in the U-shaped part.

As a preferred technical scheme of the invention, a fixing rod is inserted into the third rotating shaft, one end of the fixing rod is fixedly connected with the middle part of one side of the semicircular fishing piece, the bottom of one side of the U-shaped piece is provided with a bulge, a fourth spring pin is fixedly arranged on the bulge, and one end of the fourth spring pin penetrates through the bulge and is inserted and connected with the fixed seat.

As a preferred technical scheme of the present invention, the positioning mechanism includes a first arc-shaped member, the first arc-shaped member is fixedly connected to the fishing net, a positioning groove is formed in one end of the first arc-shaped member, a spring is fixedly disposed at one end of the positioning groove, and a stopper is fixedly disposed at one end of the spring.

As a preferred technical scheme of the invention, one end of the stop block is fixedly provided with a second arc-shaped piece, one end of the second arc-shaped piece penetrates through the positioning groove and is connected with the other end of the first arc-shaped piece in an inserting manner, the first arc-shaped piece is provided with a sliding groove, the sliding groove is connected with a sliding head in a sliding manner, and one end of the sliding head penetrates through the sliding groove and is fixedly connected with the stop block.

As a preferred technical solution of the present invention, the other end of one side of the U-shaped fixing plate is sequentially and fixedly provided with a controller and a driver from top to bottom, the stepping motor is electrically connected to the driver, and the driver is electrically connected to the controller.

As a preferable technical scheme of the invention, a handle is fixedly arranged at the top of one side of the U-shaped piece.

And (II) installing the river channel dredging device on an environment-friendly cutter suction type dredging ship to carry out an underwater dredging construction method for the urban ecological river channel, wherein the construction method comprises the following steps:

(1) floating pipe laying

Arranging floating pipes behind the environment-friendly cutter suction type desilting ship, connecting floating drums by adopting steel pipes with the length of 6m to form the floating pipes, flexibly connecting adjacent steel pipes by using rubber pipes with the length of 1.5m, and arranging the floating pipes in a streamline bending way; because the floating pipe bears the impact force of water flow, wind waves and hydraulic filling construction, the clamp between the pipe sections of the floating pipe is firmly installed, the swing amplitude and the circuit of the floating pipe are controlled to be smooth, the floating pipe is anchored and positioned every 100m, and the destructive swing of the floating pipe line caused by the water flow and the wind speed is prevented from influencing construction production;

(2) laying down submerged pipe

Before construction, a submerged pipe pipeline is connected to a spacious river bank in advance, a section of rubber pipe is matched with every 3 mud conveying steel pipes for flexible connection, one end of each mud conveying steel pipe is plugged by a steel plate and a rubber gasket, a working ship is adopted to drag the mud conveying steel pipes into water and drag the mud conveying steel pipes to perform semi-submersible movement, and after the pipeline reaches a preset position, the pipeline is submerged in a water injection and exhaust mode to form laying of an underwater submerged pipe pipeline;

(3) laying of shore pipe on land

The shore pipe on land consists of elbows and rubber pipes with different angles, is connected by adopting flanges, rubber gaskets and bolts, adopts manual lifting connection construction during laying of the shore pipe, keeps flat and straight during laying and avoids dead bending; when the shore pipe is laid in a region passing through the vegetation of the nursery stock, the trees are strictly tied, and a protective wood plate is padded at each flange joint in order to avoid the damage of the vegetation caused by direct ballasting of the pipe; when the shore pipe is laid on a road or an embankment facility, the culvert is utilized to pass through as much as possible; when the vehicle has to pass through, the guide slope is erected or the road is broken and buried, so that normal traffic is guaranteed, and the vehicle is repaired after the vehicle is finished;

(4) dredging and transporting sludge

The floating pipe and the submerged pipe are connected and sealed by adopting a rubber pipe, joint sealing work is well done during installation, a pipeline pressure test is carried out before formal desilting, and the operations of desilting and sludge conveying can be formally started after the full-line sealing is ensured to be leak-free; wherein, a relay pump ship is additionally arranged when the mud conveying distance exceeds the single-pump conveying distance, and the mud conveying pipeline is laid on the principle of shortening the construction row distance and the influence on the environment is reduced; during the conveying process, the pipeline is prevented from bursting, the joints and the pipeline are prevented from leaking water, crops are damaged, greening along the pipeline is avoided, and the pipeline is repaired in time when faults occur.

The invention has the beneficial effects that: when the dredging device for the river channel is not needed to be dredged, the transmission mechanism is operated, the roller connected with the motor on the transmission mechanism is connected with the rectangular block in an inserting mode, the step motor of the transmission mechanism is controlled to work, the rope body connected with the motor on the transmission mechanism is matched, the motor can drive the water suction pipe to float to the water surface, the motor can be fixed on the connecting piece through the limiting mechanism and the connecting pipe in a matching mode, after the motor is installed, the semicircular salvaging piece can be rotated to be limited at the position which is opposite to the connecting piece and located between the stirring head and the ship body through the movable mechanism, the motor drives the stirring head to rotate, the water grass can be cut, the water grass and the duckweed which are cut can be discharged to the external water after being filtered and then conveyed to the original position through the water suction pipe and the external underwater pipeline, the water grass and the duckweed which are cut can be collected efficiently through the salvaging net, the transmission mechanism is operated, so that the roller connected with the semicircular salvage piece on the transmission mechanism is alternated and connected with the rectangular block, the step motor of the transmission mechanism is controlled to work, the semicircular salvage piece can be dragged, the movable mechanism is matched, the semicircular salvage piece can be moved on the ship body, the positioning mechanism is matched, the salvage net can be taken down quickly, and by means of the device, the silt can be removed, the float grass and the duckweed can be removed, the utilization rate of resources is improved, and the practicability is enhanced.

(II) the construction method has the technical effects that: 1. the operation process is simple, dredging processes such as digging, conveying, discharging, slurry treatment and the like can be completed at one time, the processes of cofferdam building in the early stage and cofferdam dismantling in the later stage are reduced, the process of pumping water from the dry river is reduced, continuous operation is realized, the production efficiency is high, the cost is low, the digging working surface is flat, the digging slope depth is easy to control, the construction quality is good, and the popularization is convenient.

2. The environment-friendly cutter suction dredger is provided with a special dredging device, has the effect of preventing the leakage and diffusion of polluted sludge, can dredge thin polluted bottom sludge, has small disturbance on the bottom sludge, avoids the phenomena of diffusion and sludge escape of the polluted sludge, and has the bottom sludge removal rate of over 95 percent; the sludge concentration is high, the mass fraction of the dredging mud reaches more than 70%, and the once dredging thickness is 20-110 cm. Meanwhile, the environment-friendly cutter suction dredger is provided with a high-precision positioning technology and an on-site monitoring system, and the excavating track of the dredging equipment can be visually observed through simulation animation; the elevation control accurately positions the depth of the reamer through the depth indicator and the echo depth sounder, and the excavation precision is high.

3. The construction method is suitable for dredging projects of medium and large river channels and small lakes with thick mud layers.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings: FIG. 1 is a schematic structural diagram of a river dredging device according to the present invention; FIG. 2 is a schematic structural diagram of a limiting mechanism of the river dredging device of the present invention; FIG. 3 is a schematic view of a partial structure of a limiting mechanism of the river dredging device according to the present invention; FIG. 4 is a schematic structural diagram of a transmission mechanism of the river channel dredging device of the present invention; FIG. 5 is a schematic front view of a positioning mechanism of the river dredging device of the present invention; FIG. 6 is a schematic sectional view of a positioning mechanism of the river dredging apparatus according to the present invention; FIG. 7 is a schematic structural diagram of a movable mechanism of the river dredging device of the present invention; FIG. 8 is a process flow diagram of the construction method; FIG. 9 is a schematic view of the connection of the float tube; FIG. 10 is a schematic view of the connection of a buoyancy tube and a submerged tube; in the figure: 1. a hull; 2. a suction pipe; 3. a connecting member; 4. a connecting pipe; 5. a limiting mechanism; 501. a bump; 502. a first rotating shaft; 503. connecting blocks; 504. a third spring pin; 505. a round head; 6. a motor; 7. a connecting rod; 8. a stirring head; 9. a fixed seat; 10. a movable mechanism; 1001. a second bearing; 1002. a second rotating shaft; 1003. a U-shaped piece; 1004. a third rotating shaft; 1005. fixing the rod; 1006. a fourth spring pin; 11. a semicircular fishing part; 12. a positioning mechanism; 1201. a first arcuate member; 1202. a spring; 1203. a stopper; 1204. a second arcuate member; 1205. sliding the head; 13. a salvage net; 14. a transmission mechanism; 1401. a U-shaped fixing plate; 1402. a stepping motor; 1403. a rectangular block; 1404. a first limit rod; 1405. a first dovetail slide block; 1406. a second limiting rod; 1407. a second dovetail slide block; 1408. a limiting plate; 1409. a first bearing; 1410. a roller; 1411. a rope body; 1412. a first spring pin; 1413. a second spring pin; 15. a controller; 16. a driver, 17, a steel pipe (a mud conveying pipe, a mud conveying steel pipe), 18 and a rubber pipe (a rubber sleeve); 19. and (4) submerging the tube.

Detailed Description

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.

Example 1: a river channel dredging device is shown in figures 1, 2, 3, 4, 5, 6 and 7 and comprises a ship body 1 and a water suction pipe 2, wherein a connecting piece 3 is fixedly arranged at the top of one side of the ship body 1, the top end of the water suction pipe 2 is communicated with a connecting pipe 4, the connecting pipe 4 is connected with the connecting piece 3 through a limiting mechanism 5, a motor 6 is arranged at the top of the connecting pipe 4, a plurality of connecting rods 7 are fixedly arranged at the bottom end of the motor 6 at equal intervals, the bottom end of each connecting rod 7 is fixedly connected with the top end of the connecting pipe 4, a stirring head 8 is fixedly arranged on an output shaft of the motor 6, a fixed seat 9 is fixedly arranged at one side of the top end of the ship body 1, the fixed seat 9 is close to the connecting piece 3, the fixed seat 9 is connected with a semicircular fishing piece 11 through a movable mechanism 10, the semicircular fishing piece 11 is provided with a through hole, the semicircular fishing piece 11 is, the semicircular fishing part 11 is connected with a fishing net 13 through four positioning mechanisms 12, the four positioning mechanisms 12 are positioned at the upper, lower, left and right parts of the fishing net 13, a transmission mechanism 14 for pulling the motor 6 and the semicircular fishing part 11 is arranged at one side of the top end of the ship body 1 and at a part close to the fixed seat 9, the transmission mechanism 14 comprises a U-shaped fixed plate 1401, the U-shaped fixed plate 1401 is fixedly arranged at the top end of the ship body 1, a stepping motor 1402 is fixedly arranged at one end of one side of the U-shaped fixed plate 1401, an output shaft of the stepping motor 1401 penetrates through the U-shaped fixed plate and is fixedly provided with a rectangular block 1403, a first limit rod 1404 is fixedly arranged at the middle part of the bottom end of the other side of the U-shaped fixed plate 1401, a first dovetail chute 1405 is arranged at the top end of the first limit rod 1404, the first dovetail chute is slidably connected with, the top end of the second limit rod 1406 is provided with a second dovetail slide 1407, the second dovetail slide groove is connected with a second dovetail slide 1407 in a sliding manner, the top end of the second dovetail slide 1407 is fixedly provided with a limit plate 1408, both sides of the limit plate 1408 are embedded with first bearings 1409, the inner ring of the first bearings 1409 is fixedly provided with a roller 1410, the middle part of the roller 1410 is in a concave arrangement, one side of the roller 1410 is provided with a rectangular groove matched with the rectangular block 1403, the concave parts of the two rollers 1410 are respectively and fixedly provided with a rope 1411, one end of each of the two ropes 1411 is respectively and fixedly connected with one side of the motor 6 and the top of one side of the semicircular fishing piece 11, one side of the first limit rod 1404 is embedded with a first spring pin 1412, one side of the first dovetail slide is provided with a first insertion hole matched with the first spring pin 1412, one side of the second limit rod 1406 is embedded with a second spring pin 1413, and both ends of one side of the second dovetail slide 1407 are provided with a second insertion hole matched with the second spring pin 1413, the second receptacle is opposite the first bearing 1409.

The limiting mechanism 5 comprises two convex blocks 501, a first open slot matched with the connecting pipe 4 is formed in the middle of one side of the connecting piece 3, second open slots matched with the convex blocks 501 are formed in two sides of the first open slot, and the two convex blocks 501 are fixedly connected with the middle of two sides of the connecting pipe 4 respectively; the two sides of the second slot are both fixedly provided with a first rotating shaft 502, a connecting block 503 is inserted on the first rotating shaft 502, a third spring pin 504 is embedded at the top end of the connecting block 503, one end of the third spring pin 504 is inserted and connected with the convex block 501, and a round head 505 is inserted and fixed at the top end of the first rotating shaft 502.

The movable mechanism 10 comprises a second bearing 1001, a second rotating shaft 1002 is fixedly arranged on an inner ring of the second bearing 1001, and a U-shaped part 1003 is fixedly arranged at the top end of the second rotating shaft 1002; a third rotating shaft 1004 is fixedly arranged in the U-shaped part 1003; a fixing rod 1005 penetrates through the third rotating shaft 1004, one end of the fixing rod 1005 is fixedly connected with the middle of one side of the semicircular fishing piece 11, the bottom of one side of the U-shaped piece 1003 is provided with a protrusion, a fourth spring pin 1006 is fixedly arranged on the protrusion, and one end of the fourth spring pin 1006 penetrates through the protrusion and is connected with the fixing seat 9 in a penetrating manner.

The positioning mechanism 12 comprises a first arc-shaped part 1201, the first arc-shaped part 1201 is fixedly connected with the fishing net 13, a positioning groove is formed in one end of the first arc-shaped part 1201, a spring 1202 is fixedly arranged at one end of the positioning groove, and a stop block 1203 is fixedly arranged at one end of the spring 1202; the fixed second arc 1204 that is equipped with of one end of dog 1203, and the one end of second arc 1204 pass the constant head tank and be connected with the other end interlude of first arc 1201, has seted up the spout on the first arc 1201, and spout sliding connection has slider 1205, and the one end of slider 1205 pass the spout and with dog 1203 fixed connection.

Wherein, the other end of one side of the U-shaped fixed plate 1401 is fixedly provided with a controller 15 and a driver 16 from top to bottom in sequence, the stepping motor 1402 is electrically connected with the driver 16, and the driver 16 is electrically connected with the controller 15.

Wherein, a handle is fixedly arranged at the top of one side of the U-shaped element 1003.

In operation, when the cleaning is not needed, the second dovetail slide 1407 can slide the limit plate 1408 to make the roller 1410 connected with the motor 6 just face the rectangular block 1403, the second spring pin 1413 can fix the moved limit plate 1408 on the second limit rod 1406, the first dovetail slide 1405 can move the second limit rod 1406 to make the roller 1410 insert and connect with the rectangular block 1403, the first spring pin 1412 can fix the moved second limit rod 1406 on the first limit rod 1404, the controller 16 and the cooperating driver 15 can control the operation of the stepping motor 1402, the stepping motor 1402 can drive the cover roller 1410 to rotate, the rope 1411 connected with the motor 6 can be wound on the roller 1410, the motor 6 can drive the water suction pipe 2 to float on the water surface, the connecting pipe 4 can be placed in the first slot, the connecting block 503 can be rotated through the first rotating shaft 502, the connecting block 503 is positioned on the bump 501, the motor 6 is fixed on the connecting piece 3 through the third spring pin 504, the semicircular salvage piece 11 can be rotated through the second bearing 1001 and the second rotating shaft 1002, the semicircular salvage piece 11 is limited at the position which is opposite to the connecting piece 3 and is positioned between the stirring head 8 and the ship body 1, the semicircular salvage piece 11 is fixed at the moment through the fourth spring pin 1006, the motor 6 drives the stirring head 8 to rotate, aquatic weeds can be cut, the cut aquatic weeds and duckweeds and the like can be discharged to outside water and then conveyed to the original position through the salvage net 13 after being filtered, the collection efficiency of the cut aquatic weeds and duckweeds and the like can be improved through the salvage net 13, when enough aquatic weeds and duckweeds and the like are collected in the salvage net 13, the other roller 1410 is connected with the rectangular block in a penetrating way, step motor 1402 drives this roller 1410 to rotate, make another rope 1411 convolute on this roller 1410, and then drag semi-circular salvage 11, make semi-circular salvage 11 be higher than hull 1, pull fourth spring catch 1006 this moment, the cooperation handle, make semi-circular salvage 11 rotate to hull 1 on, slip ram 1205, make dog 1203 drive second arc 1204 and remove, the spring 1202 compresses, and then can be quick take out fishing net 13 from semi-circular salvage 11, through the device, not only can the desilting, but also can be used for detaching pasture and water grass and duckweed etc., the utilization ratio of resource has been improved, the practicality has been strengthened.

Embodiment 2, the above-mentioned river dredging device is installed on an environment-friendly cutter suction type dredging ship to carry out an underwater dredging construction method for an urban ecological river, as shown in fig. 8, fig. 9 and fig. 10, the construction method comprises the following steps:

(1) floating pipe laying

The floating pipe with actual required application is arranged behind the environment-friendly cutter suction dredger, the floating pipe is formed by penetrating a steel pipe with the length of 6m into the floating barrel, and the steel pipes are flexibly connected by a rubber pipe (rubber sleeve) with the length of 1.5m, so that the output pipe and the submerged pipe of the slurry pump body of the dredger have good movement room, and the laying line of the floating pipe is similar to streamline bending. Because the floating pipe is required to bear the influences of water flow, wind waves, impact force during hydraulic filling construction and the like, clamping between pipe sections is required to be firm and reliable, the swing amplitude of the floating pipe and the smoothness of a line are strictly controlled, small anchors are thrown in two directions at intervals of 100m for positioning, and the situation that the construction production is influenced because the pipeline swings greatly due to the water flow and the wind speed is prevented;

(2) laying down submerged pipe

Connecting a mud conveying pipeline on a spacious river bank in advance before construction, allocating a section of rubber pipe for flexible connection every 3 mud conveying steel pipes, plugging one end of the pipeline by adopting a customized steel plate and a rubber gasket, towing the pipeline into water by adopting a working ship, towing the pipeline to be semi-submerged, connecting end stations at two ends after the pipeline basically reaches a preset position, allocating a water pump and a compression air pump (an air compressor with 2m power/min) and corresponding gate valves at the end stations, and realizing pipeline submergence by injecting water into the submerged pipe and exhausting through a breather valve;

(3) laying of shore pipe

The shore pipe is composed of elbows and rubber pipes with different angles, is connected by adopting flanges, rubber gaskets and bolts, is constructed by manually picking and lifting connection during laying, is as flat and straight as possible during laying and avoids dead bending; protection measure for nursery stock and road in pipeline laying

When the sludge discharge pipeline passes through the nursery stock vegetation area, the trees are strictly prevented from being tied, and in order to avoid the direct ballasting of the pipeline to destroy the vegetation, a protective wood plate is padded at the joint of each flange. When the mud conveying pipeline passes through a road and an embankment facility, the mud conveying pipeline passes through a culvert as much as possible. When the vehicle has to pass through, the guide slope is erected or the road is broken and buried, so that normal traffic is guaranteed, and the vehicle is repaired after the vehicle is finished;

(4) pressure pipeline conveying sludge

The environment-friendly cutter suction type dredging boat is used for dredging, a large-caliber mud conveying pump is provided with a mud conveying pipe to convey the mud to a mud storage pool of a solidification site, and a relay pump boat is additionally arranged when the mud conveying distance exceeds the single pump conveying distance. The principle of laying the mud conveying pipeline is to shorten the construction row spacing as much as possible, and the influence on the environment is to be reduced as much as possible. In the process of conveying the sludge pipeline, pressure pipeline burst, joint and pipeline water leakage, crop damage, greening and the like are avoided as much as possible, and the pipeline is repaired in time when a fault occurs; the floating pipe and the submerged pipe on water are all high-quality pipelines produced by professional manufacturers, the quality of the pipelines is strictly controlled, and the pipelines which are seriously worn are found in the construction process and are immediately replaced. The floating pipe and the submerged pipe are connected and sealed by a rubber pipe, and joint sealing work is performed during installation. Before formal mud conveying, a pipeline pressure test is carried out, and after the leakage of the whole line seal is ensured, the formal mud discharge can be started. Before the equipment is shut down, clear water is sucked and flushed into the pipeline for more than ten minutes, so that the phenomenon of pipe blockage is avoided.

The specific engineering example is as follows:

(1) the project name is as follows: and (3) treating black and odorous water in urban areas of Jiangyin cities. (2) Engineering address: jiangyin city area of Wuxi city in Jiangsu province. (3) Engineering scale: the north tide river is in the south-north direction, the north is connected with the Tianhe, the south is connected with the Yueyuan road, the whole line is desilted, and the regulation range is from the Yueyuan road to the Tianhe mouth. Along the trend of the river channel, the main roads of a lotus road, a new road, a north flower road, a south bridge road, a new long railway and the like cross the river channel from north to south. The length of the river channel is 2800m, the width is about 18m, the water depth is about 2m, and the elevation of the river bottom is planned to be 0 m. The old adapted Tianhe is in a crescent moon shape, two ends of the old adapted Tianhe are connected with the Tianhe, and the old adapted Tianhe passes through the cottonrose hibiscus road and the cement road in the pioneer garden along the line, so that the whole line is desilted, the length of the river channel is about 678m, and the width of the river channel is about 24 m. (4) The application effect is as follows: the application effect is good, and the approval of the superior safety department, quality department and technical department of the project and the favorable comment of the supervision party and the owner party are obtained.

Claims (9)

1. The river channel dredging device comprises a ship body (1) and a water suction pipe (2), and is characterized in that a connecting piece (3) is fixedly arranged at the top of one side of the ship body (1), the top end of the water suction pipe (2) is communicated with a connecting pipe (4), the connecting pipe (4) is connected with the connecting piece (3) through a limiting mechanism (5), a motor (6) is arranged at the top of the connecting pipe (4), a plurality of connecting rods (7) are fixedly arranged at the bottom end of the motor (6) at equal intervals, the bottom ends of the connecting rods (7) are fixedly connected with the top end of the connecting pipe (4), and a stirring head (8) is fixedly arranged on an output shaft of the motor (6); a fixing seat (9) is fixedly arranged on one side of the top end of the ship body (1), the fixing seat (9) is close to the connecting piece (3), the fixing seat (9) is connected with a semicircular fishing piece (11) through a movable mechanism (10), the semicircular fishing piece (11) is provided with a through hole, the semicircular fishing piece (11) is obliquely arranged, the semicircular fishing piece (11) is just opposite to the connecting piece (3) and is positioned between the stirring head (8) and the ship body (1), the semicircular fishing piece (11) is connected with a fishing net (13) through four positioning mechanisms (12), and the four positioning mechanisms (12) are positioned at the upper part, the lower part, the left part and the right part of the fishing net (13); a transmission mechanism (14) used for pulling a motor (6) and a semicircular fishing piece (11) is arranged on one side of the top end of the ship body (1) and close to the fixing seat (9), the transmission mechanism (14) comprises a U-shaped fixing plate (1401), the U-shaped fixing plate (1401) is fixedly installed on the top end of the ship body (1), one end of one side of the U-shaped fixing plate (1401) is fixedly provided with a stepping motor (1402), an output shaft of the stepping motor (1402) penetrates through the U-shaped fixing plate (1401) and is fixedly provided with a rectangular block (1403), the middle part of the bottom end of the other side of the U-shaped fixing plate (1401) is fixedly provided with a first limiting rod (1404), the top end of the first limiting rod (1404) is provided with a first dovetail sliding groove which is slidably connected with a first dovetail sliding block (1405), the top end of the first dovetail sliding block (1405) is fixedly provided with, a second dovetail sliding block (1407) is arranged at the top end of the second limiting rod (1406), the second dovetail sliding groove is connected with the second dovetail sliding block (1407) in a sliding manner, a limiting plate (1408) is fixedly arranged at the top end of the second dovetail sliding block (1407), first bearings (1409) are embedded on two sides of the limiting plate (1408), a roller (1410) is fixedly arranged on an inner ring of the first bearing (1409), the middle part of the roller (1410) is sunken, a rectangular groove matched with the rectangular block (1403) is formed in one side of the roller (1410), ropes (1411) are fixedly arranged at the sunken parts of the two rollers (1410), and one ends of the two ropes (1411) are fixedly connected with one side of the motor (6) and the top of one side of the semicircular fishing piece (11) respectively; one side of first gag lever post (1404) is inlayed and is equipped with first spring round pin (1412), and one side of first forked tail slider (1405) seted up with first spring round pin (1412) assorted first jack, one side of second gag lever post (1406) side is inlayed and is equipped with second spring round pin (1413), and the both ends of second forked tail slider (1407) avris all seted up with second spring round pin (1413) assorted second jack, the second jack is just to first bearing (1409).

2. The river channel dredging device according to claim 1, wherein the limiting mechanism (5) comprises two protrusions (501), a first slot matched with the connecting pipe (4) is formed in the middle of one side of the connecting member (3), second slots matched with the protrusions (501) are formed in two sides of the first slot, and the two protrusions (501) are respectively fixedly connected with the middle of two sides of the connecting pipe (4).

3. The river channel dredging device according to claim 2, wherein a first rotating shaft (502) is fixedly arranged on each side of the second slot, a connecting block (503) is inserted on the first rotating shaft (502), a third spring pin (504) is embedded at the top end of the connecting block (503), one end of the third spring pin (504) is inserted and connected with the convex block (501), and a round head (505) is inserted and fixed at the top end of the first rotating shaft (502).

4. A river channel dredging device according to claim 1 or 2 and 3, wherein the movable mechanism (10) comprises a second bearing (1001), a second rotating shaft (1002) is fixedly arranged on an inner ring of the second bearing (1001), a U-shaped member (1003) is fixedly arranged at the top end of the second rotating shaft (1002), and a third rotating shaft (1004) is fixedly arranged in the U-shaped member (1003); the top of one side of the U-shaped piece (1003) is fixedly provided with a handle.

5. The river channel dredging device according to claim 4, wherein a fixing rod (1005) penetrates through the third rotating shaft (1004), one end of the fixing rod (1005) is fixedly connected with the middle of one side of the semicircular fishing piece (11), the bottom of one side of the U-shaped piece (1003) is provided with a protrusion, a fourth spring pin (1006) is fixedly arranged on the protrusion, and one end of the fourth spring pin (1006) penetrates through the protrusion and is connected with the fixed seat (9) in a penetrating manner.

6. The river channel dredging device according to claim 1, 2 or 3, wherein the positioning mechanism (12) comprises a first arc-shaped member (1201), the first arc-shaped member (1201) is fixedly connected with the fishing net (13), a positioning groove is formed in one end of the first arc-shaped member (1201), a spring (1202) is fixedly arranged at one end of the positioning groove, and a stop block (1203) is fixedly arranged at one end of the spring (1202).

7. The river channel dredging device according to claim 6, wherein a second arc-shaped member (1204) is fixedly arranged at one end of the stop block (1203), one end of the second arc-shaped member (1204) penetrates through the positioning groove and is connected with the other end of the first arc-shaped member (1201) in an inserting manner, a sliding groove is formed in the first arc-shaped member (1201), a sliding head (1205) is connected with the sliding groove in a sliding manner, and one end of the sliding head (1205) penetrates through the sliding groove and is fixedly connected with the stop block (1203).

8. The river channel dredging device according to claim 1, 2 or 3, wherein the other end of one side of the U-shaped fixing plate (1401) is sequentially and fixedly provided with a controller (15) and a driver (16) from top to bottom, the stepping motor (1402) is electrically connected with the driver (16), and the driver (16) is electrically connected with the controller (15).

9. A construction method for underwater dredging of an urban ecological river by installing the river dredging device of claim 1 on an environment-friendly cutter suction type dredging ship is characterized by comprising the following steps:

(1) floating pipe laying

Arranging floating pipes behind the environment-friendly cutter suction type desilting ship, connecting floating drums by adopting steel pipes with the length of 6m to form the floating pipes, flexibly connecting adjacent steel pipes by using rubber pipes with the length of 1.5m, and arranging the floating pipes in a streamline bending way; because the floating pipe bears the impact force of water flow, wind waves and hydraulic filling construction, the clamp between the pipe sections of the floating pipe is firmly installed, the swing amplitude and the circuit of the floating pipe are controlled to be smooth, the floating pipe is anchored and positioned every 100m, and the destructive swing of the floating pipe line caused by the water flow and the wind speed is prevented from influencing construction production;

(2) laying down submerged pipe

Before construction, a submerged pipe pipeline is connected to a spacious river bank in advance, a section of rubber pipe is matched with every 3 mud conveying steel pipes for flexible connection, one end of each mud conveying steel pipe is plugged by a steel plate and a rubber gasket, a working ship is adopted to drag the mud conveying steel pipes into water and drag the mud conveying steel pipes to perform semi-submersible movement, and after the pipeline reaches a preset position, the pipeline is submerged in a water injection and exhaust mode to form laying of an underwater submerged pipe pipeline;

(3) laying of shore pipe on land

The shore pipe on land consists of elbows and rubber pipes with different angles, is connected by adopting flanges, rubber gaskets and bolts, adopts manual lifting connection construction during laying of the shore pipe, keeps flat and straight during laying and avoids dead bending; when the shore pipe is laid in a region passing through the vegetation of the nursery stock, the trees are strictly tied, and a protective wood plate is padded at each flange joint in order to avoid the damage of the vegetation caused by direct ballasting of the pipe; when the shore pipe is laid on a road or an embankment facility, the culvert is utilized to pass through as much as possible; when the vehicle has to pass through, the guide slope is erected or the road is broken and buried, so that normal traffic is guaranteed, and the vehicle is repaired after the vehicle is finished;

(4) dredging and transporting sludge

The floating pipe and the submerged pipe are connected and sealed by adopting a rubber pipe, joint sealing work is well done during installation, a pipeline pressure test is carried out before formal desilting, and the operations of desilting and sludge conveying can be formally started after the full-line sealing is ensured to be leak-free; wherein, a relay pump ship is additionally arranged when the mud conveying distance exceeds the single-pump conveying distance, and the mud conveying pipeline is laid on the principle of shortening the construction row distance and the influence on the environment is reduced; during the conveying process, the pipeline is prevented from bursting, the joints and the pipeline are prevented from leaking water, crops are damaged, greening along the pipeline is avoided, and the pipeline is repaired in time when faults occur.

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