CN218437267U - Dredging device and dredging ship - Google Patents

Abstract

The utility model provides a dredging device, which comprises a drill bit, a pipe body, a drill rod and a rotary driving piece; the utility model discloses a drilling machine, including body, drilling rod, rotary driving piece, extraction chamber, conveying pipe, drill bit, the body is inside to be separated into through the separator and to extract the chamber and carry the chamber, extraction chamber intercommunication extraction pipe, carry chamber intercommunication water injection pipe, the drilling rod sets up with the body coaxial line and the drilling rod rotates and sets up on the separator, the upper end of drilling rod is connected to rotary driving piece's output, the lower extreme of drilling rod is connected to the drill bit. The utility model discloses a dredge the digging device and can directly go deep into and dredge to the target layer, need not to clear away the bed mud on upper strata, the submarine top layer original state soil of at utmost destroys, maintains ecosystem's stable balance. The utility model also provides an include dredge the dredger of digging device, can realize that the purpose of ecological dredging or grit exploitation.

Description

Dredging device and dredging ship

Technical Field

The utility model relates to a dredge equipment technical field, concretely relates to dredge device and dredge ship of digging.

Background

At present, aiming at dredging at the bottom of water, dredging ships at home and abroad mainly remove sediments such as sludge at the bottom of a water body in modes of cutter suction, grab bucket, drag suction and the like so as to finish dredging construction of rivers, lakes and reservoirs, but the mode is used for dredging and cleaning the water area with the purposes of increasing the water volume of the area, increasing the water passing section of the area, widening the digging depth of a navigation channel and the like due to the fact that the pollution of the water body is not serious or the content of pollutants in the sludge is not high, and the ecological systems such as the underwater biocoesis and the like can be reestablished only if the damage to the biocoesis at the bottom of the water body and a substrate mud layer is serious or even destructive.

In addition, present dredge and dig boats and ships except driving submarine siltation also by being used for submarine grit exploitation, be subject to the cutter and inhale, the grab bucket, the limitation of modes such as trailing suction, traditional dredge and dig boats and ships need drive the overburden on upper strata earlier before adopting the sand operation and make the sand bed expose, then stretch into the sand bed with inhaling the sand pump and take out the sand construction, to the disturbance of upper strata soil, destroy great, upper silt can return silt to taking out sand district under the rivers effect simultaneously and lead to impurity such as mud content in the grit of suction, need can reach the requirement for quality of building sandstone through wasing many times.

The utility model patent with application number CN200920253134.9 provides a sand equipment is inhaled to high pressure water spray, reamer, probing formula, wherein provides a probing formula inhale husky device, and it is different from traditional modes such as the cutter is inhaled, grab bucket, harrow and inhales, has overcome the drawback of traditional mode to a certain extent, but it has the integrated level lower, dredge the less problem of scope of digging.

In view of the above, there is a need for a dredging device and dredging ship to solve the problems in the prior art.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a dredge device, aim at solving the current not enough of dredging the existence of digging the mode, concrete technical scheme as follows:

a dredging device comprises a drill bit, a pipe body, a drill rod and a rotary driving piece; the utility model discloses a drilling machine, including body, drilling rod, rotary driving piece, extraction chamber, conveying pipe, drilling rod and body coaxial line, the extraction chamber is separated into through the separator and is extracted the chamber and carry the chamber to the body is inside, extraction chamber intercommunication extraction pipe, conveying chamber intercommunication water injection pipe, the drilling rod sets up on the separator with the body coaxial line and the drilling rod rotates, the upper end of drilling rod is connected to rotary driving piece's output, the lower extreme of drilling rod is connected to the drill bit.

Preferably, in the above technical scheme, the extraction pipe is communicated with the slurry pump to discharge dredged objects at the drill bit through the extraction cavity and the extraction pipe; the water injection pipe is communicated with the water pump, and pressure water is injected to the drill bit through the water injection pipe and the conveying cavity.

Preferably, the outer port of the extraction pipe and the outer port of the water injection pipe are provided with connecting flanges.

Preferably, the device further comprises a horizontal expanding and digging device; the horizontal expanding and digging device comprises a telescopic driving piece and a circular ring piece, the circular ring piece is sleeved on the outer wall of one end, close to the drill bit, of the pipe body in a sliding mode, at least one pair of horizontal jet orifices are formed in the outer wall of the conveying cavity, a water outlet is formed in the circular ring piece, and the telescopic driving piece drives the circular ring piece to slide to achieve conduction or stop between the horizontal jet orifices and the water outlet.

Preferably among the above technical scheme, collineation between the central line of two horizontal efflux mouths that set up in pairs.

Preferably among the above technical scheme, the extraction chamber can be dismantled in the one end that is close to the drill bit and be equipped with the filter screen spare, the one end that is close to the drill bit of transport chamber can be dismantled and be equipped with the shower nozzle.

The utility model also provides a dredge ship of digging, including hull, flexible support piece, rotation support, play equipment and dredge the device of digging, rotate the support lower extreme and rotate the connection hull, flexible support piece's both ends are rotated respectively and are connected the hull and rotate the support, it is equipped with the cell body that is used for holding to dredge the device to rotate the support, it connects to dredge the device of digging and is used for realizing dredging to transfer or pack up to the cell body in the device of digging from the cell body to play equipment.

Preferably in the above technical scheme, the hoisting and releasing device comprises a winch, a steel wire rope and a fixed pulley, the winch is arranged on the ship body and used for winding and releasing the steel wire rope, the fixed pulley is arranged on the rotating support, and the steel wire rope is connected with the dredging and digging device after bypassing the fixed pulley.

Preferably, in the above technical scheme, the winch and the rotating bracket are arranged on the hull through the reinforcing member; the ship body is provided with a support portal frame, and the support portal frame is used for supporting a rotating support in an inclined state.

Preferably, in the above technical scheme, the tank body is used for guiding the downward placement of the dredging device; an operation chamber is arranged on the ship body.

Use the technical scheme of the utility model, following beneficial effect has:

the utility model discloses a dredge the device and can directly go deep into to dredge to the target layer and dig, need not to clear away the bed mud on upper strata. When dredging and cleaning of the lower layer of dredged objects are completed, the undisturbed soil naturally collapses and sinks, so that the undisturbed sludge with a certain thickness on the water bottom surface layer is reserved, the damage of the undisturbed soil on the water bottom surface layer is reduced to the maximum extent, the stable balance of an ecological system is maintained, and the purpose of ecological dredging is realized. In addition, dredging construction operation is carried out in the closed range of the bottom of the reserved layer, so that the diffusion of sludge in the construction process is effectively reduced, the risk of water body pollution caused by construction is reduced, and the ecological environment protection in the dredging process is realized.

The arrangement of the horizontal expanding excavation device can enlarge the dredging range of a single hole, increase the construction capacity and reduce the construction cost; the dredging device can achieve the purposes of increasing the water volume of the region, increasing the water passing section of the region, widening the dredging depth of a channel and the like.

The dredging device of the utility model can be used for gravel mining, and because the dredging device directly goes deep into a target layer for dredging, the whole dredging process almost has no disturbance to a covering layer containing biological communities and bottom materials, thereby reducing the water turbidity condition and slurry diffusion caused by soil disturbance; the sand and stone resources obtained by dredging and excavating are low in content of impurities such as soil, and only once cleaning and screening are carried out, so that medium and coarse sand and pebbles which are directly used for engineering construction are obtained, the water consumption for cleaning and the treatment amount of later-stage residual water are reduced while shipborne screening and washing equipment is reduced, the construction cost is reduced, and meanwhile, the space saved by the ship is reserved for adding equipment for later-stage process optimization.

In addition to the above-described objects, features and advantages, the present invention has other objects, features and advantages. The present invention will be described in further detail with reference to the drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification. In the drawings:

FIG. 1 is a schematic view of the overall construction of the dredging device;

FIG. 2 isbase:Sub>A cross-sectional view taken at A-A in FIG. 1;

FIG. 3 is a schematic illustration of the operation of the dredging device;

FIG. 4 is an elevation view of the dredge vessel;

FIG. 5 is a side view of the dredge vessel;

the device comprises a water body 1, a reserved layer 2, a reserved layer 3, a first dredging layer 4, a second dredging layer 5, a dredging device 5.1, a drill bit 5.2, a pipe body 5.3, a drill rod 5.4, a rotary driving piece 5.5, an extraction pipe 5.6, a water injection pipe 5.7, a connecting flange 5.8, an extraction cavity 5.9, a conveying cavity 5.10, a filter screen piece 5.11, a spray head 5.12, a telescopic driving piece 5.13, a circular ring piece 5.14, a water outlet 5.15, a horizontal jet port 5.16, a partition piece 6, a ship body 7, an operation room 8, a support door frame 9, a telescopic support piece 10, a winch 11, a steel wire rope 12, a fixed pulley 13, a rotary support 13.1, a groove body 14 and a reinforcing piece.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter, giving preferred embodiments of the invention. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

Example 1:

referring to fig. 1-3, an excavation apparatus comprises a drill bit 5.1, a tubular body 5.2, a drill rod 5.3 and a rotary drive 5.4; the interior of the pipe body 5.2 is divided into an extraction cavity 5.8 and a conveying cavity 5.9 by a partition part 5.16, the extraction cavity 5.8 is communicated with an extraction pipe 5.5, the conveying cavity 5.9 is communicated with a water injection pipe 5.6, the drill rod 5.3 and the pipe body 5.2 are coaxially arranged, the drill rod is rotatably arranged on the partition part 5.16, preferably, a hollow pipe is welded on the partition part, the drill rod is rotatably arranged in the hollow pipe, and a bearing can be arranged between the drill rod and the hollow pipe to realize free rotation of the drill rod; the output end of the rotary driving piece 5.4 is connected with the upper end of the drill rod 5.3, and the drill bit 5.1 is connected with the lower end of the drill rod 5.3, namely the rotary driving piece drives the drill rod and the drill bit to rotate together. The rotary drive 5.4 is preferably an electric motor, the fixed part of which can be mounted on the upper end of the tube 5.2 by means of bolts.

Preferably, the drill bit 5.1 is provided with drill bit cutter teeth, so that dredging efficiency is improved conveniently.

Specifically, the extraction pipe 5.5 is communicated with a slurry pump, so that dredged materials at the drill bit 5.1 are discharged through the extraction cavity 5.8 and the extraction pipe 5.5; the water injection pipe 5.6 is communicated with a water pump to realize that pressure water (namely high-pressure water) is injected to the drill bit 5.1 through the water injection pipe 5.6 and the conveying cavity 5.9.

Preferably, the extraction pipe 5.8 is communicated with the upper part of the extraction cavity 5.8, and the water injection pipe 5.6 is communicated with the upper part of the delivery cavity 5.9.

Referring to fig. 1, the outer port of the extraction pipe 5.5 and the outer port of the water injection pipe 5.6 are both provided with a connecting flange 5.7, and the outer port in this embodiment refers to one end of the extraction pipe 5.5 or the water injection pipe 5.6 away from the pipe body 5.2; the skilled person can understand that the purpose of providing the connecting flange in this embodiment is to reduce the difficulty of connecting the extraction pipe and the water injection pipe with other pipelines and ports; in practical application, the extraction pipe 5.5 can be connected with a pipeline through the connecting flange 5.7 and then connected with the slurry pump through a pipeline, and the water injection pipe 5.6 can also be connected with a pipeline through the connecting flange 5.7 and then connected with the water pump through a pipeline. Of course, if the extraction pipe and the water injection pipe self length satisfy under service condition's the condition, it is possible to realize that the extraction pipe is direct to be connected to the sediment stuff pump through flange, and the water injection pipe is direct to be connected to the water pump through flange.

The dredging device also comprises a horizontal expanding and digging device, the horizontal expanding and digging device is arranged at one end, close to the drill bit, of the pipe body, the horizontal expanding and digging device is used for expanding the dredging and digging range of the dredging and digging device, and disturbance can be formed at the lower end (namely one end, close to the drill bit) of the pipe body; the influence range on dredging layers is enlarged, the dredging amount of single holes is increased to a certain extent, the construction capacity is increased, and the construction cost is reduced, as shown in fig. 3.

Specifically, the horizontal expanding and digging device comprises a telescopic driving piece 5.12 and a circular ring piece 5.13, the circular ring piece 5.13 is slidably sleeved on the outer wall of one end, close to the drill bit, of the pipe body 5.2, at least one pair of horizontal jet orifices 5.15 are formed in the outer wall of the conveying cavity 5.9, a water outlet 5.14 is formed in the circular ring piece 5.13, and the telescopic driving piece drives the circular ring piece to slide to achieve conduction or stop between the horizontal jet orifices 5.15 and the water outlet 5.14.

Preferably, the water outlet can be a single hole which is in one-to-one correspondence with the horizontal jet orifice 5.15 in number, the single hole can be in a shape of a circle, a square or the like, and the communication or the cut-off between the water outlet and the horizontal jet orifice is realized by driving the circular ring piece to slide through the telescopic driving piece.

Besides, the water outlet can also be a waist-shaped hole or a square hole which is simultaneously communicated with a plurality of horizontal jet orifices, and the like, and the water outlet can also meet the communication or cut-off between the water outlet and the horizontal jet orifices by adopting the structural form.

Preferably, the telescopic driving member is one of an oil cylinder, an air cylinder or an electric cylinder. The body is connected to flexible driving piece one end, and the ring piece is connected to the other end, and the gliding stability of ring piece is guaranteed in the circumferencial direction adoption equipartition setting of many flexible driving pieces at the body, prevents the jamming.

Further, the center lines of the two horizontal jet orifices 5.15 arranged in pairs are collinear, as shown in fig. 2; the benefit that sets up like this can offset the effort that two horizontal jet orifices produced for the body is in a balanced state, can not lead to dredging to dig the device slope, rock, rotation etc. because of the effort that horizontal jet orifice jetted out the rivers and restraints, dredges to dig the device and can keep sinking perpendicularly under the action of gravity.

Referring to fig. 1, a filter screen member 5.10 is detachably arranged at one end of the extraction cavity 5.8 close to the drill bit, and the filter screen member 5.10 is used for filtering large particles in dredging objects and preventing the extraction cavity and an extraction pipe from being blocked; by replacing filter screen pieces with different specifications, the filtering of particles with different particle sizes can be realized, so that the dredging device in the embodiment can be used for sandstone exploitation and can also be used for dredging under the water body 1; carry chamber 5.9 can dismantle in the one end that is close to the drill bit and be equipped with shower nozzle 5.11, because carry the circulation cross-section diminish of chamber to shower nozzle direction, pressure water can carry out the pressure boost acceleration rate when to the shower nozzle, can produce high-speed rivers and strike the excavation department of drill bit, cause the disturbance. When the device is applied specifically, high-speed water flow is mixed with the dredging objects and is discharged through the extraction cavity and the extraction pipe.

Referring to fig. 4 and 5, this embodiment also provides a dredge ship, including hull 6, flexible support piece 9, rotation support 13, play equipment and dredge the device of digging, rotation support 13 lower extreme rotates and connects hull 6, flexible support piece 9's both ends rotate respectively and connect hull 6 and rotation support 13, rotation support 13 is equipped with the cell body 13.1 that is used for holding the device of dredging, it connects the device of dredging and is used for realizing dredging to transfer or pack up to the cell body in the device of dredging from the cell body to pull the device of dredging.

Preferably, the telescopic support is a hydraulic telescopic rod, which is prior art and will not be further described herein.

The rotation connection in this embodiment is preferably hinged, and the rotation bracket 13 and the dredging device in the trough body can rotate around the hinged point at the bottom of the rotation bracket together through the extension and retraction of the telescopic supporting piece 9, so that the rotation bracket and the dredging device can be adjusted to be in a vertical state or an inclined state.

The ship body is also provided with equipment necessary for ship navigation, such as: the power driving device, the positioning pile and lifting device, the positioning pile trolley and the like are specifically referred to in the prior art.

Specifically, the hoisting and releasing equipment in this embodiment includes a winch 10, a steel wire rope 11 and a fixed pulley 12, the winch 10 is arranged on the hull 6 and used for reeling and releasing the steel wire rope 11, the fixed pulley 12 is arranged on the rotating support 13, and the steel wire rope 11 is connected with the dredging and digging device after bypassing the fixed pulley 12.

Referring to fig. 4, the fixed pulleys 12 are arranged at the upper end and the lower end of the rotating bracket, and a steel wire rope from the winch is connected with the pipe body of the dredging device after bypassing the fixed pulley at the lower end and the fixed pulley at the upper end; the winch releases the steel wire rope, and the dredging and digging device falls freely under the action of self gravity to enter a dredging and digging layer to work; and the winch winds the steel wire rope to lift the dredging device into the groove body.

Further, the winch 10 and the rotating bracket 13 are arranged on the hull 6 through the reinforcing member 14, and the thickness of the clamping plate of the hull is relatively thin, so that the reinforcing member is firstly arranged on the clamping plate, and then the winch and the rotating bracket are respectively arranged on the reinforcing member, and the reinforcing member can increase the connection rigidity between the winch and the rotating bracket and the hull.

Referring to fig. 4, a support gantry 8 is arranged on the hull 6, and the support gantry 8 is used for supporting a rotating bracket 13 in an inclined state, that is, when the rotating bracket 13 is in a laid-down inclined state, the upper part of the rotating bracket is supported by the support gantry.

Preferably, during actual setting, the size of the groove body can be designed to be slightly larger than that of the dredging device, namely the dredging device is allowed to freely fall; because the length direction of the groove body is the same as that of the dredging device, when the dredging device is positioned in the groove body, the groove body 13.1 can be used for guiding the downward placement of the dredging device;

further, an operation room 7 is arranged on the ship body, and an operation control system is arranged in the operation room.

The technical scheme of the embodiment is specifically as follows:

after the dredging ship reaches a designated construction area, the rotary support 13 and the dredging device 5 are driven to jack up to be in a vertical state by operating the telescopic support 9, the dredging device 5 is positioned above a drill hole by moving the ship, and the dredging ship is positioned; the carrier is close to berth for ease of reception of the dredging.

The extraction pipe 5.5 is connected with a slurry pump, and the water injection pipe is connected with a water pump; the winch 10 is controlled to release the steel wire rope 11, the dredging device 5 is lowered under the action of gravity, and the rotary driving piece 5.4 drives the drill bit 5.1 to rotate.

Slowly enabling the dredging device to enter water, controlling a frequency conversion cabinet in the cabin through an operation room 7 on the ship to start a water pump and a slurry pump with low power, further loosening the cut sludge through high-pressure water and keeping the sludge in a plastic state after a drill 5.1 contacts a mud layer of the reserved layer 2, and pumping the dredging object to a transport ship by the slurry pump;

when a drill bit of the dredging device penetrates through the retention layer 2 and approaches the elevation of the dredging layer, gradually coordinating to increase the power of the water pump and the slurry pump to the optimal power, and starting full-load dredging work; after a certain cavity area is formed in the dredging layer, starting the horizontal expanding and digging device to further expand the dredging and digging range; the clear water volume that control water pump pours into is greater than the mix volume of dredging and digging through the sediment stuff pump absorption in dredging and digging the layer, makes the water pressure in dredging and digging the layer cavity be higher than the water pressure who remains layer upper portion to guarantee to dredge the unsettled bed mud retention layer of digging the in-process and can obtain certain support, avoided remaining the collapse of layer in dredging and digging the in-process to a certain extent.

The first dredging layer 3 and the second dredging layer 4 are dredged sequentially along with the continuous falling of the dredging device until the set dredging depth is finished; the winch tightens up the steel wire rope, the dredging and digging device is lifted slowly, and the power of the water pump and the slurry pump is gradually reduced. And after the bottom of the dredging device leaves the reserved layer, the water pump is closed firstly to reduce the disturbance influence of high-pressure water on the bottom mud, and after dredged materials in the suction cavity and the extraction pipe are flushed and discharged completely, the slurry pump is closed, and then the dredging device is ready to move to the next drilling hole.

The dredging completed retaining layer naturally collapses and sinks to retain the original-state soil with a certain thickness on the water bottom surface layer, so that the damage of the original-state soil on the water bottom surface layer is reduced to the maximum extent, the stable balance of an ecological system is maintained, and the ecological dredging is realized.

Use the technical scheme of the utility model, the effect is:

the dredging device in the embodiment can directly go deep into the target layer to dredge, and bottom mud on the upper layer does not need to be removed. When dredging and cleaning of the lower layer of dredged objects are completed, the undisturbed soil naturally collapses and sinks, so that the undisturbed sludge with a certain thickness on the water bottom surface layer is reserved, the damage of the undisturbed soil on the water bottom surface layer is reduced to the maximum extent, the stable balance of an ecological system is maintained, and the purpose of ecological dredging is realized. In addition, dredging construction operation is carried out in the closed range of the bottom of the reserved layer, so that the diffusion of sludge in the construction process is effectively reduced, the risk of water body pollution caused by construction is reduced, and the ecological environment protection in the dredging process is realized.

The arrangement of the horizontal expanding excavation device can enlarge the dredging range of a single hole, increase the construction capacity and reduce the construction cost; the dredging device can achieve the purposes of increasing the water volume of the region, increasing the water passing section of the region, widening the dredging depth of a channel and the like.

The dredging device in the embodiment can be used for sandstone exploitation, and because the dredging device directly goes deep into a target layer for dredging, the whole dredging process almost has no disturbance on a covering layer containing a biological community and a substrate, so that the water turbidity condition and slurry diffusion caused by soil disturbance are reduced; the impurity content such as earth of the grit resource that the dredging was excavated and was mined out is low, only once washs, sieves and has obtained the required medium coarse sand of direct use for engineering construction, cobble, has also reduced the amount of washing water and the amount of treatment of later stage residual water when reducing on-board sieve washing equipment, has reduced construction cost, and the space that boats and ships saved simultaneously also has left the space for later stage process optimization carries out equipment addition.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A dredging device is characterized by comprising a drill bit (5.1), a pipe body (5.2), a drill rod (5.3) and a rotary driving piece (5.4); body (5.2) inside separates into extraction chamber (5.8) and carries chamber (5.9) through separator (5.16), extraction chamber (5.8) intercommunication extraction pipe (5.5), carry chamber (5.9) intercommunication water injection pipe (5.6), drilling rod (5.3) and body (5.2) coaxial line setting and drilling rod rotate and set up on separator (5.16), the upper end of drilling rod (5.3) is connected to the output of rotary driving piece (5.4), the lower extreme of drilling rod (5.3) is connected in drill bit (5.1).

2. The dredging device according to claim 1, wherein the extraction pipe (5.5) is communicated with a slurry pump to realize the discharge of dredging at the drill bit (5.1) through the extraction cavity (5.8) and the extraction pipe (5.5); the water injection pipe (5.6) is communicated with the water pump to realize that pressure water is injected to the drill bit (5.1) through the water injection pipe (5.6) and the conveying cavity (5.9).

3. Dredging device according to claim 2, wherein the outer port of the extraction pipe (5.5) and the outer port of the injection pipe (5.6) are provided with a connecting flange (5.7).

4. The dredging device of claim 1, further comprising a horizontal enlarging device; the horizontal expanding and digging device comprises a telescopic driving piece (5.12) and a circular ring piece (5.13), wherein the circular ring piece (5.13) is slidably sleeved on the outer wall of one end, close to the drill bit, of the pipe body (5.2), at least one pair of horizontal jet orifices (5.15) are formed in the outer wall of the conveying cavity (5.9), a water outlet (5.14) is formed in the circular ring piece (5.13), and the telescopic driving piece drives the circular ring piece to slide to achieve conduction or stop between the horizontal jet orifices (5.15) and the water outlet (5.14).

5. Dredging device according to claim 4, characterized in that the centrelines of the two horizontal jet openings (5.15) arranged in pairs are collinear.

6. Dredging device according to claim 1, characterized in that the extraction chamber (5.8) is provided with a removable strainer element (5.10) at the end close to the drill bit and the delivery chamber (5.9) is provided with a removable nozzle (5.11) at the end close to the drill bit.

7. The dredging ship is characterized by comprising a ship body (6), a telescopic support piece (9), a rotating support (13), a lifting device and the dredging device as claimed in any one of claims 1-6, wherein the lower end of the rotating support (13) is rotated to be connected with the ship body (6), the two ends of the telescopic support piece (9) are respectively rotated to be connected with the ship body (6) and the rotating support (13), the rotating support (13) is provided with a groove body (13.1) for accommodating the dredging device, and the lifting device is connected with the dredging device and is used for realizing that the dredging device is transferred from the groove body or is packed into the groove body.

8. The dredging ship according to claim 7, wherein the lifting and releasing device comprises a winch (10), a steel wire rope (11) and a fixed pulley (12), the winch (10) is arranged on the ship body (6) and used for winding and releasing the steel wire rope (11), the fixed pulley (12) is arranged on the rotating support (13), and the steel wire rope (11) is connected with the dredging device after bypassing the fixed pulley (12).

9. Dredger according to claim 8, characterized in that the winch (10) and the turning bracket (13) are arranged on the hull (6) via a reinforcement (14); the ship is characterized in that a supporting portal frame (8) is arranged on the ship body (6), and the supporting portal frame (8) is used for supporting a rotating support (13) in an inclined state.

10. Dredging vessel according to claim 7, wherein the trough (13.1) is used for guiding the lowering of the dredging device; an operation chamber (7) is arranged on the ship body.

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