CN115288229B - Closed disturbance-free dredging system and dredging method - Google Patents
Closed disturbance-free dredging system and dredging method Download PDFInfo
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- CN115288229B CN115288229B CN202211077666.8A CN202211077666A CN115288229B CN 115288229 B CN115288229 B CN 115288229B CN 202211077666 A CN202211077666 A CN 202211077666A CN 115288229 B CN115288229 B CN 115288229B
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- 238000000034 method Methods 0.000 title claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000010802 sludge Substances 0.000 claims description 7
- 239000002002 slurry Substances 0.000 claims description 5
- 238000013519 translation Methods 0.000 claims description 4
- 238000012546 transfer Methods 0.000 claims description 2
- 238000005086 pumping Methods 0.000 abstract description 10
- 239000010410 layer Substances 0.000 description 69
- 108010066057 cabin-1 Proteins 0.000 description 15
- 230000008569 process Effects 0.000 description 6
- 239000013049 sediment Substances 0.000 description 6
- 230000008901 benefit Effects 0.000 description 5
- 238000010276 construction Methods 0.000 description 4
- 238000009825 accumulation Methods 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 230000000149 penetrating effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000002355 dual-layer Substances 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 230000002262 irrigation Effects 0.000 description 1
- 238000003973 irrigation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F5/00—Dredgers or soil-shifting machines for special purposes
- E02F5/28—Dredgers or soil-shifting machines for special purposes for cleaning watercourses or other ways
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B15/00—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area
- B08B15/02—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area using chambers or hoods covering the area
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B15/00—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area
- B08B15/04—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area from a small area, e.g. a tool
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/88—Dredgers; Soil-shifting machines mechanically-driven with arrangements acting by a sucking or forcing effect, e.g. suction dredgers
- E02F3/90—Component parts, e.g. arrangement or adaptation of pumps
- E02F3/92—Digging elements, e.g. suction heads
- E02F3/9212—Mechanical digging means, e.g. suction wheels, i.e. wheel with a suction inlet attached behind the wheel
Abstract
The invention discloses a closed type undisturbed dredging system, which comprises a cylindrical cabin with an upper part closed and a bottom opening, wherein a pipeline connected with a mud pumping pipe is arranged in the center of the cabin, the outer side of the pipeline is connected with a mud digging device for digging mud, and the mud digging device comprises: the grab bucket excavating driving device is used for enabling the lower part of the grab bucket to open outwards, excavate downwards and fold inwards; the dredging grab bucket is folded inwards to enable the bottom to enclose a closed containing cavity. The invention also discloses a closed disturbance-free dredging method. The invention realizes the protection of the water environment and greatly reduces the disturbance operation on the water environment.
Description
Technical Field
The invention relates to a dredging structure and a construction method, in particular to a closed type undisturbed dredging system and a dredging method.
Background
At present, the global dredging total amount per year in recent years reaches billions of cubes, the generated economic total amount reaches billions of dollars, the dredging demand reaches six billions of cubes only on coasts in China, the market scale reaches billions of dollars, the dredging amount of river and lake reservoirs in China is two billions of cubes nearby each year, and especially the reservoir sediment accumulation with longer running time is more serious. The sediment accumulation in the reservoir can seriously threaten the safety of the reservoir, and the social benefits and economic benefits such as flood control, irrigation, water supply, power generation and the like can be fully exerted. In addition, due to rapid development of social economy and destruction of an environmental ecosystem, water systems such as lakes, rivers and the like are polluted to different degrees, so that sediment is a main accumulation place of various pollutants in water.
At present, the main tool for dredging the sediment is a modern dredger, and the dredging process can cause the problems of re-suspension of the polluted sediment, reduced transparency of the water body, diffusion of high-concentration organic matters in the sediment and interstitial water, secondary pollution and the like. Although there are environmental protection reamer heads, overflow-free pneumatic dredge pump technologies and the like which are developed for the problem of overflow of floating mud in the construction process of dredge vessels, the current underwater dredging technologies and equipment can cause a certain degree of disturbance to the polluted bottom mud coverage area and have serious energy consumption in continuous operation of a target area.
Disclosure of Invention
The invention provides a closed disturbance-free dredging system and a dredging method for solving the technical problems in the prior art.
The invention adopts the technical proposal for solving the technical problems in the prior art that: the utility model provides a closed no disturbance dredging system, includes upper portion closed bottom open-ended cylinder cabin, sets up the pipeline of being connected with the suction pipe in the cabin center, and the pipeline outside is connected with the dredging device that is used for excavating mud, and the dredging device includes: the grab bucket digging driving device enables the lower part of the grab bucket to open outwards, fold inwards and move up and down; the dredging grab bucket is folded inwards to enable the bottom to enclose a closed containing cavity.
Further, the grab bucket excavating driving device comprises double-layer sliding rails and connecting rods, wherein the number of the double-layer sliding rails and the connecting rods are matched with that of the dredging grab buckets, and the double-layer sliding rails and the connecting rods are uniformly distributed along the circumferential direction of the pipeline; the double-layer sliding rail comprises an inner-layer sliding rail, an outer-layer sliding rail and a sliding rail fixing seat fixedly connected with the pipeline; the slide rail fixing seat, the inner slide rail and the outer slide rail are sequentially connected in a sliding manner; the inner layer sliding rail is hinged with the upper end of the connecting rod, the outer layer sliding rail is hinged with the upper part of the dredge grab bucket, and the lower end of the connecting rod is fixedly connected with the dredge grab bucket; the radial distance between the connecting point of the lower end of the connecting rod fixedly connected with the dredge grab bucket and the axis of the pipeline is larger than the radial distance between the connecting point of the outer layer sliding rail hinged with the upper part of the dredge grab bucket and the axis of the pipeline.
Further, the connecting rod is an electrically driven telescopic connecting rod; when the telescopic connecting rod is contracted, the lower part of the dredge grab bucket is outwards opened; when the telescopic connecting rod stretches, the lower part of the dredge grab bucket is folded inwards.
Further, the double-layer sliding rail is an electric-driven double-layer sliding rail.
Further, two to four dredge grab buckets are uniformly distributed along the circumferential direction of the pipeline.
Further, the dredge grab bucket is divided into an upper part, a middle part and a lower part; the upper surface is an arc concave curved surface, the middle surface is a cylindrical surface, and the lower surface is a conical surface.
Further, three dredge grab buckets are uniformly distributed along the circumferential direction of the pipeline; the middle part of the dredge grab bucket is semi-cylindrical, the upper surface of the dredge grab bucket is an arc-shaped concave curved surface formed by rotating an arc-shaped curve 180 degrees around the axis of the middle part of the dredge grab bucket, and the vertical projection included angle of two side edges of the lower surface of the dredge grab bucket is 120 degrees.
Further, the lower surface of the dredge grab is angled 100 ° from its central axis.
The invention also provides a closed type disturbance-free dredging method by using the closed type disturbance-free dredging system, which comprises the following steps:
step 1, installing a closed disturbance-free dredging system on land as a whole and installing the system on a suction dredger, and connecting a dredger pipe through a flange;
step 1, carrying a closed type disturbance-free dredging system to a target area, stably sinking the closed type disturbance-free dredging system, and starting dredging after the closed type disturbance-free dredging system is settled and stabilized;
step 2, controlling a grab bucket excavating driving device to enable the lower part of the dredged grab bucket to be outwards opened, and downwards moving from an initial height, and stopping after the lower part of the grab bucket is inserted into sludge for a certain depth;
step 3, controlling a grab bucket excavating driving device to enable the lower part of the dredged grab bucket to fold inwards and move upwards, and stopping after the bottom of the dredged grab bucket encloses a closed cavity;
step 4, controlling a grab bucket excavating driving device to enable the bottom of the excavating grab bucket to keep a closed state and move upwards to an initial height, and starting a mud pump to pump mud;
and 5, transferring the closed disturbance-free dredging system to the next target area, and repeating the steps 2 to 4.
Further, when the closed disturbance-free dredging system is transferred to the next target area, translation is carried out under water, and meanwhile slurry conveying operation is carried out in the transfer process.
The invention has the advantages and positive effects that: the closed type undisturbed dredging system and the dredging method can reduce disturbance to polluted bottom mud, protect water environment stability and improve dredging efficiency, simply and reliably realize continuous operation of dredging work on the premise of ensuring high-efficiency integrated dredging of a modern dredger, improve dredging operation efficiency, realize protection to the water environment and greatly reduce disturbance operation to the water environment under the closed type undisturbed dredging system. The advantages are as follows:
1) The cylindrical cabin with the upper part being closed and the bottom being open is adopted, so that the operation range of dredging engineering is ensured, the undisturbed water body and bottom mud outside the closed cabin is ensured, the stability of the water body environment is ensured, the displacement work of the structure is simpler, the limited operation is smaller, and the capability of adapting to the water body environment is strong.
2) The structure of the dredge grab bucket can change the influence of the former reamer on the environmental operation, and the grab bucket excavating driving device also reduces the loss of the dredge grab bucket and can prolong the service life of the dredge grab bucket.
3) The double-layer sliding rail structure can realize outward opening and downward digging of the lower part of the dredge grab bucket, improve the dredging work efficiency, improve the dredging work stability and reduce the energy consumption.
Drawings
FIG. 1 is a schematic diagram of a closed disturbance-free dredging system according to the present invention.
Fig. 2 is a bottom view of a closed disturbance-free dredging system according to the invention.
Fig. 3 is a schematic structural view of a dredger according to the present invention.
Fig. 4 is a schematic diagram of a double-layer sliding rail structure uniformly distributed along the circumferential direction of a pipeline.
FIG. 5 is a schematic illustration of a configuration of three dredged grab buckets uniformly distributed along the circumference of a pipeline in accordance with the present invention.
FIG. 6 is a schematic view showing a state in which the lower portion of a dredge grab of a dredge device of the present invention is folded inward.
Fig. 7 is a schematic view showing a state in which the lower portion of a dredge grab of a dredge device of the present invention is opened outwardly.
In the figure: 1. a cabin; 2. a mud pumping pipe; 3. a pipe; 4. the slide rail fixing seat; 5. an inner layer slide rail; 6. an outer layer sliding rail; 7. the upper part of the dredge grab bucket; 8. the middle part of the dredge grab bucket; 9. the lower part of the dredge grab bucket; 10. and a connecting rod.
Detailed Description
For a further understanding of the invention, its features and advantages, reference is now made to the following examples, which are illustrated in the accompanying drawings in which:
referring to fig. 1 to 7, a closed type disturbance-free dredging system comprises a cylindrical cabin 1 with an upper portion closed and a bottom opened, a pipeline 3 connected with a mud pumping pipe 2 is arranged in the center of the cabin 1, a mud dredging device for dredging mud is connected to the outer side of the pipeline 3, and the mud dredging device comprises: the dredging grab bucket is uniformly distributed along the circumference of the pipeline 3, and the grab bucket dredging driving device enables the lower part 9 of the dredging grab bucket to be outwards opened, inwards folded and upwards and downwards moved; the dredging grab bucket is folded inwards to enable the bottom to enclose a closed containing cavity.
Preferably, the grab bucket excavating driving device can comprise double-layer sliding rails and connecting rods 10, the number of which is matched with that of the grab bucket and are uniformly distributed along the circumference of the pipeline 3; the double-layer slide rail can comprise an inner layer slide rail 5, an outer layer slide rail 6 and a slide rail fixing seat 4 fixedly connected with the pipeline 3; the slide rail fixing seat 4, the inner slide rail 5 and the outer slide rail 6 are sequentially connected in a sliding manner; the inner layer slide rail 5 can be hinged with the upper end of the connecting rod 10, the outer layer slide rail 6 can be hinged with the upper part 7 of the dredge grab bucket, and the lower end of the connecting rod 10 can be fixedly connected with the dredge grab bucket; the radial distance between the connecting point of the lower end of the connecting rod 10 fixedly connected with the dredger grab and the axis of the pipeline 3 is larger than the radial distance between the connecting point of the outer layer sliding rail 6 hinged with the upper part 7 of the dredger grab and the axis of the pipeline 3; when the outer layer sliding rail 6 moves downwards relative to the inner layer sliding rail 5, the lower part 9 of the dredge grab bucket can be outwards opened; the lower part 9 of the dredge grab can be folded inwards when the outer slide rail 6 moves upwards relative to the inner slide rail 5. The dredging grab bucket can be lifted and lowered when the inner layer sliding rail 5 slides up and down relative to the sliding rail fixing seat 4. When the connecting rod 10 is of a fixed length, the outer layer sliding rail 6 can move downwards relative to the inner layer sliding rail 5, so that the lower part 9 of the dredge grab is outwards opened; the outer slide rail 6 is moved upwards relative to the inner slide rail 5, so that the lower part 9 of the dredge grab is folded inwards.
Preferably, the link 10 may be an electrically or pneumatically or hydraulically driven telescopic link; when the telescopic connecting rod is contracted, the outer layer sliding rail 6 moves downwards relative to the inner layer sliding rail 5; when the telescopic connecting rod stretches, the outer layer sliding rail 6 moves upwards relative to the inner layer sliding rail 5.
Preferably, the dual-layer slide rail may be an electrically or pneumatically or hydraulically driven dual-layer slide rail.
Preferably, two to four dredge grab buckets can be evenly distributed along the circumference of the pipeline 3.
Preferably, the dredge grab bucket can be divided into an upper part, a middle part and a lower part; the surface of the upper part 7 of the dredge grab bucket can be an arc concave curved surface, the surface of the middle part 8 of the dredge grab bucket can be a cylindrical surface, and the surface of the lower part 9 of the dredge grab bucket can be a conical surface.
Preferably, three dredge grab buckets can be uniformly distributed along the circumference of the pipeline 3; the middle part of the dredge grab bucket can be semi-cylindrical, the upper surface of the dredge grab bucket is an arc-shaped concave curved surface formed by rotating an arc-shaped curve 180 degrees around the axis of the middle part of the dredge grab bucket, and the vertical projection included angle of two side edges of the lower surface of the dredge grab bucket is 120 degrees.
Preferably, the lower surface of the dredge grab may be at an angle of 100 ° to its central axis.
The cabin, the mud pumping pipe, the pipeline, the slide rail fixing seat, the inner slide rail, the outer slide rail, the mud digging grab bucket, the connecting rod and the like can be manufactured by adopting applicable parts in the prior art or adopting parts and materials in the prior art and adopting conventional technical means.
The invention also provides a closed type disturbance-free dredging method by using the closed type disturbance-free dredging system, which comprises the following steps:
step 1, installing a closed disturbance-free dredging system on land as a whole and installing the system on a suction dredger, and connecting a mud pumping pipe 2 through a flange;
and step 1, carrying the closed type disturbance-free dredging system to a target area, stably sinking the closed type disturbance-free dredging system, and starting dredging after the closed type disturbance-free dredging system is settled and stabilized.
And 2, controlling the grab bucket excavating driving device to enable the lower part 9 of the dredge grab bucket to be outwards opened and move downwards from the initial height, and stopping after the lower part of the grab bucket is inserted into the sludge for a certain depth.
And 3, controlling the grab bucket excavating driving device to enable the lower part 9 of the dredge grab bucket to fold inwards and move upwards, and stopping after the bottom of the dredge grab bucket encloses a closed cavity.
And 4, controlling the grab bucket excavating driving device to enable the bottom of the excavating grab bucket to keep a closed state and move upwards to an initial height, and starting the slurry pump to pump the slurry.
And 5, transferring the closed disturbance-free dredging system to the next target area, and repeating the steps 2 to 4.
Preferably, when the closed type undisturbed dredging system is transferred to the next target area, the translation can be carried out under water, and meanwhile, the slurry conveying operation can be carried out in the transferring process.
The construction and operation of the present invention will be further described with reference to a preferred embodiment thereof:
the utility model provides a closed no disturbance dredging system, includes upper portion closed bottom open-ended cylinder cabin 1, sets up the pipeline 3 of being connected with suction pipe 2 in cabin 1 center, and the pipeline 3 outside is connected with the dredging device that is used for excavating mud, and the dredging device includes: the dredging grab bucket is uniformly distributed along the circumference of the pipeline 3, and the grab bucket dredging driving device enables the lower part 9 of the dredging grab bucket to be outwards opened, inwards folded and upwards and downwards moved; the dredging grab bucket is folded inwards to enable the bottom to enclose a closed containing cavity.
The grab bucket excavating driving device comprises double-layer sliding rails and connecting rods 10, the number of which is matched with that of the dredging grab buckets and are uniformly distributed along the circumferential direction of the pipeline 3; the double-layer slide rail comprises an inner layer slide rail 5, an outer layer slide rail 6 and a slide rail fixing seat 4 welded with the pipeline 3; the slide rail fixing seat 4, the inner slide rail 5 and the outer slide rail 6 are sequentially connected in a sliding manner; the inner layer sliding rail 5 slides up and down relative to the sliding rail fixing seat 4; the outer slide rail 6 slides up and down relative to the inner slide rail 5.
The inner layer slide rail 5 is hinged with the upper end of the connecting rod 10, the outer layer slide rail 6 is hinged with the upper part 7 of the dredge grab bucket, and the lower end of the connecting rod 10 is fixedly connected with the dredge grab bucket; the radial distance between the connecting point of the lower end of the connecting rod 10 fixedly connected with the dredge grab bucket and the axis of the pipeline 3 is larger than the radial distance between the connecting point of the outer layer sliding rail 6 hinged with the upper part 7 of the dredge grab bucket and the axis of the pipeline 3.
The connecting rod 10 is an electrically driven telescopic connecting rod; when the telescopic connecting rod is contracted, the outer layer sliding rail 6 moves downwards relative to the inner layer sliding rail 5; when the telescopic connecting rod stretches, the outer layer sliding rail 6 moves upwards relative to the inner layer sliding rail 5. The double-layer sliding rail is an electric driving double-layer sliding rail.
The inner layer slide rail 5 is made to be static relative to the slide rail fixing seat 4, the outer layer slide rail 6 of the double-layer slide rail can be driven to lift, and the lower part 9 of the dredge grab bucket is opened outwards or closed inwards in an auxiliary manner by matching with the action of the telescopic connecting rod.
The outer layer slide rail 6 is made to be static relative to the inner layer slide rail 5, the inner layer slide rail 5 is made to descend relative to the slide rail fixing seat 4, and the dredging grab bucket can be made to move downwards to stretch into mud; the inner layer slide rail 5 is enabled to ascend relative to the slide rail fixing seat 4, so that the dredge grab bucket can be enabled to move upwards, and the dredge pipe 2 is convenient for extracting sludge.
In the preferred embodiment, a pipeline 3 connected with a mud pumping pipe 2 is welded at the center of a closed cabin 1 through an opening, the diameter of the closed cabin 1 is D, the height is H, the diameter of the mud pumping pipe 2 is matched with the diameter of the opening, and the diameter D of the mud pumping pipe 2 is 0.1D. The length of the pipe 3 going deep into the closed cabin 1 is h=5/9H.
As shown in fig. 4, three double-layer sliding rails are installed on the wall of the pipeline 3 penetrating into the closed cabin 1, the double-layer sliding rails are uniformly distributed along the circumferential direction of the pipeline 3, the spacing angles take the axis of the pipeline 3 as the shaft, and the centers of the adjacent sliding rails are spaced by 120 degrees.
FIG. 5 is a schematic view of a dredge grab, which is divided into upper, middle and lower parts; the upper surface can be an arc concave curved surface, the middle surface can be a cylindrical surface, and the lower surface can be a conical surface. The wall thickness of the upper part 7 of the dredge grab bucket is thickened, the middle part is semi-cylindrical, and the included angle between the surface of the lower part and the axis of the middle part is 100 degrees.
The number of the dredge grab bucket is three, and the vertical projection included angle of the two side edges of the surface of the lower part 9 of each dredge grab bucket is 120 degrees. When the three dredge grab bucket structures are closed, an included angle of 360 degrees is formed.
Fig. 6 is a schematic view showing a state in which the lower part 9 of the dredge grab of the dredge device of the present invention is folded inwards. The axes of the telescopic connecting rods form an included angle of 30 degrees with the axes of the double-layer sliding rails, and the three telescopic connecting rods are uniformly distributed along the circumferential direction of the pipeline 3.
In this embodiment: the diameter of the closed cabin 1 is 5m, the height is 4.5m, the wall thickness is 0.01m, the upper part of the closed cabin 1 is closed, the lower cover is removed, a pipeline 3 for connecting the mud pumping pipe 2 is welded at the central origin of the upper part of the closed cabin 1 in an open hole mode, the diameter of the open hole is 0.5m, therefore, the diameter of the pipeline 3 penetrating into the closed cabin 1 is 0.5m, the wall thickness is 0.01m, and the length of the pipeline 3 penetrating into the closed cabin 1 is 2.5m;
a sliding rail fixing seat 4 is arranged on the wall of the pipeline 3 which is 0.7m away from the upper end of the pipeline 3, the sliding rail fixing seat 4 is 0.2m long, 1.2m wide and 0.1m thick, a sliding groove with the length of 0.08m wide and the width of 1.08m deep and 0.04m deep is formed in the middle of the sliding rail fixing seat 4, an inner layer sliding rail 5 is arranged below the sliding rail fixing seat 4 and 0.4m away from the upper end of the sliding rail fixing seat, the inner layer sliding rail 5 is 0.4m long, 1.3m wide and 0.1m thick, and a sliding groove with the length of 0.1m wide and 0.4m deep and 0.05m deep is formed in the middle of the inner layer sliding rail 5; an outer layer sliding rail 6 is arranged below the inner layer sliding rail 5 and is 0.325m away from the upper end of the inner layer sliding rail, the outer layer sliding rail 6 is 0.6m long, 0.15m wide and 0.05m thick.
The wall thickness of the upper part 7 of the dredge grab bucket is thickened to be 0.3m, the middle part is semi-cylindrical, and the radius is 0.9m.
A closed disturbance-free dredging method using the closed disturbance-free dredging system comprises the following steps:
1) The manufacturing and the assembly of the closed cabin 1, the double-layer sliding rail, the telescopic connecting rod, the dredging grab bucket and the pipeline 3 are completed, the pipeline 3 is installed and prefabricated on land as a whole, and the pipeline 3 is connected with a dredge pipe through a flange, so that the closed disturbance-free dredging system is installed on a dredge ship.
2) And the closed disturbance-free dredging system is brought to a target area through the suction dredger, the structural body is stably settled, and dredging work can be started after the structural body is settled and stabilized.
3) The outer layer sliding rail 6 is controlled to slide downwards, the telescopic connecting rod is controlled to shrink simultaneously, at the moment, the three dredging grab bucket structures are in a lower opening state, when the dredging grab bucket structures are opened to a maximum angle, the inner layer sliding rail 5 of the double-layer sliding rail is controlled to slide downwards, and after the dredging grab bucket is inserted into silt to a certain depth, the sliding is stopped.
4) The extension of the telescopic connecting rod is controlled, and meanwhile, the outer layer sliding rail 6 is controlled to slide upwards. At the moment, the lower parts 9 of the three dredge grab buckets are folded inwards, when the bottom is enclosed to form a closed containing cavity, the inner layer slide rail 5 of the double-layer slide rail is controlled to slide upwards, and when the dredge grab buckets are lifted to the upper side of the sludge, a mud pump is started to pump the sludge.
5) When the sludge is conveyed, the closed cabin 1 can be translated to the next target area.
And repeating the processes 2), 3) and 4), namely realizing the simultaneous operation of the translation cabin 1 and the mud pumping and conveying in the construction process of the closed undisturbed dredging structure.
The above-described embodiments are only for illustrating the technical spirit and features of the present invention, and it is intended to enable those skilled in the art to understand the content of the present invention and to implement it accordingly, and the scope of the present invention is not limited to the embodiments, i.e. equivalent changes or modifications to the spirit of the present invention are still within the scope of the present invention.
Claims (8)
1. The utility model provides a closed no disturbance dredging system which characterized in that, includes upper portion closed bottom open-ended cylinder cabin, sets up the pipeline of being connected with the mud pipe in the cabin center, and the pipeline outside is connected with the dredging device that is used for excavating mud, and the dredging device includes: the grab bucket digging driving device enables the lower part of the grab bucket to open outwards, fold inwards and move up and down; the dredging grab bucket is folded inwards to enable the bottom to enclose a closed containing cavity;
the grab bucket excavating driving device comprises double-layer sliding rails and connecting rods, wherein the number of the double-layer sliding rails is matched with that of the dredging grab buckets, and the double-layer sliding rails and the connecting rods are uniformly distributed along the circumferential direction of the pipeline; the double-layer sliding rail comprises an inner-layer sliding rail, an outer-layer sliding rail and a sliding rail fixing seat fixedly connected with the pipeline; the slide rail fixing seat, the inner slide rail and the outer slide rail are sequentially connected in a sliding manner; the inner layer sliding rail is hinged with the upper end of the connecting rod, the outer layer sliding rail is hinged with the upper part of the dredge grab bucket, and the lower end of the connecting rod is fixedly connected with the dredge grab bucket; the radial distance between the connecting point of the lower end of the connecting rod fixedly connected with the dredge grab bucket and the axis of the pipeline is larger than the radial distance between the connecting point of the outer layer sliding rail hinged with the upper part of the dredge grab bucket and the axis of the pipeline;
the dredge grab bucket is divided into an upper part, a middle part and a lower part; the upper surface is an arc concave curved surface, the middle surface is a cylindrical surface, and the lower surface is a conical surface.
2. The closed disturbance-free dredging system according to claim 1, wherein the connecting rod is an electrically driven telescopic connecting rod; when the telescopic connecting rod is contracted, the lower part of the dredge grab bucket is outwards opened; when the telescopic connecting rod stretches, the lower part of the dredge grab bucket is folded inwards.
3. The closed disturbance-free dredging system according to claim 1, wherein the double-layer slide rail is an electrically driven double-layer slide rail.
4. The closed disturbance-free dredging system according to claim 1, wherein two to four dredging grab buckets are uniformly distributed along the circumferential direction of the pipeline.
5. The closed type disturbance-free dredging system according to claim 1, wherein three dredging grab buckets are uniformly distributed along the circumferential direction of the pipeline; the middle part of the dredge grab bucket is semi-cylindrical, the upper surface of the dredge grab bucket is an arc-shaped concave curved surface formed by rotating an arc-shaped curve 180 degrees around the axis of the middle part of the dredge grab bucket, and the vertical projection included angle of two side edges of the lower surface of the dredge grab bucket is 120 degrees.
6. The closed, disturbance-free dredging system according to claim 1, wherein the lower surface of the dredge grab bucket is at an angle of 100 ° to its central axis.
7. A closed disturbance-free dredging method using the closed disturbance-free dredging system according to any one of claims 1 to 6, wherein the method comprises the steps of:
step 1, installing a closed disturbance-free dredging system on land as a whole and installing the system on a suction dredger, and connecting a dredger pipe through a flange;
step 1, carrying a closed type disturbance-free dredging system to a target area, stably sinking the closed type disturbance-free dredging system, and starting dredging after the closed type disturbance-free dredging system is settled and stabilized;
step 2, controlling a grab bucket excavating driving device to enable the lower part of the dredged grab bucket to be outwards opened, and downwards moving from an initial height, and stopping after the lower part of the grab bucket is inserted into sludge for a certain depth;
step 3, controlling a grab bucket excavating driving device to enable the lower part of the dredged grab bucket to fold inwards and move upwards, and stopping after the bottom of the dredged grab bucket encloses a closed cavity;
step 4, controlling a grab bucket excavating driving device to enable the bottom of the excavating grab bucket to keep a closed state and move upwards to an initial height, and starting a mud pump to pump mud;
and 5, transferring the closed disturbance-free dredging system to the next target area, and repeating the steps 2 to 4.
8. The closed type disturbance-free dredging method according to claim 7, wherein when the closed type disturbance-free dredging system is transferred to the next target area, the translation is performed under water, and the slurry conveying operation is performed during the transfer.
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| JP2005030135A (en) * | 2003-07-10 | 2005-02-03 | Nishimatsu Constr Co Ltd | Dredging device and dredging method by use of grab bucket |
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| CN107059970A (en) * | 2016-11-11 | 2017-08-18 | 浙江水利水电学院 | The cleaning plant and its method for cleaning of a kind of lake silt |
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