EP2796619A1 - Plate-forme de travail flottable dotée d'un système de levage et procédé destiné à lever ou à abaisser une telle plate-forme de travail flottable - Google Patents

Plate-forme de travail flottable dotée d'un système de levage et procédé destiné à lever ou à abaisser une telle plate-forme de travail flottable Download PDF

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Publication number
EP2796619A1
EP2796619A1 EP14164067.2A EP14164067A EP2796619A1 EP 2796619 A1 EP2796619 A1 EP 2796619A1 EP 14164067 A EP14164067 A EP 14164067A EP 2796619 A1 EP2796619 A1 EP 2796619A1
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EP
European Patent Office
Prior art keywords
water
lifting
support
work platform
working
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP14164067.2A
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German (de)
English (en)
Other versions
EP2796619B1 (fr
Inventor
Brian Christopher Coll
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BITEK Bergungsdienst GmbH
Original Assignee
BITEK Bergungsdienst GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
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Publication of EP2796619A1 publication Critical patent/EP2796619A1/fr
Application granted granted Critical
Publication of EP2796619B1 publication Critical patent/EP2796619B1/fr
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
    • E02B17/02—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor placed by lowering the supporting construction to the bottom, e.g. with subsequent fixing thereto
    • E02B17/021—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor placed by lowering the supporting construction to the bottom, e.g. with subsequent fixing thereto with relative movement between supporting construction and platform
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
    • E02B17/04—Equipment specially adapted for raising, lowering, or immobilising the working platform relative to the supporting construction
    • E02B17/08—Equipment specially adapted for raising, lowering, or immobilising the working platform relative to the supporting construction for raising or lowering
    • E02B17/0809—Equipment specially adapted for raising, lowering, or immobilising the working platform relative to the supporting construction for raising or lowering the equipment being hydraulically actuated
    • 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
    • E02F3/907—Measuring or control devices, e.g. control units, detection means or sensors
    • 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
    • E02F3/9243—Passive suction heads with no mechanical cutting means
    • E02F3/925—Passive suction heads with no mechanical cutting means with jets
    • 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
    • E02F3/96—Dredgers; Soil-shifting machines mechanically-driven with arrangements for alternate or simultaneous use of different digging elements
    • E02F3/963—Arrangements on backhoes for alternate use of different tools
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/06—Floating substructures as supports
    • E02F9/067—Floating substructures as supports with arrangements for heave compensation
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
    • E02B2017/0039—Methods for placing the offshore structure

Definitions

  • the invention relates to a buoyant work platform, in particular a work vessel, with a lifting system for lifting the work platform out of the water or lowering the work platform onto the water. Furthermore, the invention relates to a method for raising or lowering such a buoyant work platform.
  • lifting systems In order to work independently of the wave movement and the tides, usually watercraft are equipped with lifting systems. Such lifting systems can lift the vessel out of the water.
  • a watercraft with a lifting system for supplying an offshore wind energy plant is, for example, in DE 100 21 163 B4 shown.
  • Such lifting systems in which four lifting stilts are lowered perpendicular to the seabed, however, reach only a maximum lifting speed of 1 m per minute and are not suitable for a quick, flexible use.
  • the invention is therefore based on the problem to provide an efficient and flexible device and a method to increase the productivity of working underwater, especially diving at the river bottom.
  • the buoyant work platform according to the invention in particular work ship, is designed primarily for performing work under water and has a lifting system for lifting the work platform out of the water or lowering the work platform on the water, regardless of the sea state and / or the tides of to work from the work platform.
  • the lifting system has at least four hydraulically operated support organs, which are formed like a spider leg and allow the work platform accurate positioning over ground.
  • the support members according to the invention each have a hydraulically operated lift arm and a respective support leg, wherein the lift arm is pivotally mounted on a workbench at a first pivot point and pivotally mounted on the support leg at a second pivot point.
  • the two pivot points always have a constant distance from each other.
  • at least one hydraulic cylinder is arranged on the lifting arm in order to pivot the lifting arm about the first pivot point.
  • another hydraulic cylinder is arranged on the lift arm.
  • the lifting arm is preferably designed angled and a hydraulic cylinder is attached in the angular range. As a result, a favorable force on the support members is achieved when the lift arm is pivoted about the first pivot point.
  • the support legs have an inwardly disposed hydraulic cylinder to hydraulically push out or collect a support leg extension for lifting or lowering the work platform from the support leg.
  • the working platform is lifted out of the water and can hold their position regardless of the wave motion exactly.
  • the lifting process is advantageously faster than with conventional lifting stilts and is completed within 2 to 3 minutes.
  • the supporting organs are designed in this way to lift the working platform out of the water at a water depth of up to 20 m.
  • the support legs are lowered by means of the hydraulically operated lifting arms laterally of the working platform, in particular on the long side of the work platform, into the water or brought out. This is done by pivoting the lifting arm to the first pivot point by means of at least one hydraulic cylinder.
  • the support legs Due to the length of the lifting arms, the support legs are left at a predetermined distance from the work platform into the water, whereby the working platform advantageously has a safer state than conventional helicopters, such as. In DE 100 21 163 B4 shown. Since the support members are left side of the work platform into the water, they thus have a greater distance from each other than conventional lifting stilts.
  • the support legs are lowered by means of the lifting arms, which are responsible for the stroke up or down, to a predetermined height above the water bottom. Subsequently, at each Tragab drained at least one stored in a TragbeingrundSystem telescopic stage.
  • a lock is preferably unlocked and the telescopic stage or telescopic stages sink in a force-free operation to the bottom of the water.
  • the telescopic stage or the telescopic stages are locked.
  • the retrieval of the telescopic stage or telescopic stages takes place, for example, via a hydraulic cylinder located in the support leg or a drive via an internal rack.
  • the invention is not limited to the above-described operation for discharging or retrieving the telescopic stage or telescopic stages. Rather, any designs for deflation or recovery are conceivable.
  • the support members can advantageously save space in a transport position of the work platform.
  • a foot plate is arranged on each support leg.
  • the foot plate has a diameter of 1 to 5 m, but preferably 3 m, in order to advantageously allow a planar placement of the support member on the bottom of the water and to prevent deep penetration of the support member in the sediment at the bottom of the water.
  • the foot plates have air and rinse nozzles to allow the release from the sediment at the bottom of the water.
  • a joint is arranged between the support leg and the foot plate, which is designed in such a way to compensate for existing bumps and advantageously to allow a secure position of the support leg.
  • a mechanical locking device of the support members for fixing the support members after completion of the positioning of the working platform and for fixing the support members for producing a transport position is provided. This can be advantageously saved by switching off the hydraulic system energy. Further, a mechanical locking of the support members advantageously provides more security, since unwanted loosening of the support members is prevented by the mechanical lock.
  • the buoyant work platform on an excavator in particular a hydraulic excavator, on board.
  • the excavator can be mounted with the superstructure directly on the work platform or have its own chassis.
  • Prefers The excavator has a 360 ° rotatably mounted structure in order to move the boom flexible. Alternatively, only one excavator boom can be mounted on board the work platform to use different work equipment.
  • the excavator preferably has a quick-release closure on the excavator arm in order to quickly couple or uncouple working devices, such as, for example, a work tube, a flow protection tube or a clamshell grab.
  • a quick change of work equipment is feasible, which advantageously allows efficient use of the working platform according to the invention.
  • a coupling half of the quick coupling is attached to the implement and a second coupling half of the quick coupling on the excavator, so that if necessary, both coupling halves are brought together and locked.
  • the excavator on a Global Positioning System which advantageously takes place an accurate position determination of the excavator arm and coupled to the excavator arm working device and thus a precise work is feasible.
  • GPS system Global Positioning System
  • the buoyant working platform has a working tube which can be lowered into the water and has an underwater probe, in particular a magnetic field probe, in order to detect electrically conductive, old metallic loads or magnetizable ferromagnetic materials.
  • an underwater probe in particular a magnetic field probe.
  • the detection of objects by means of the underwater probe can also be advantageous if the object is hidden in the sediment of the water body.
  • the working tube is preferably made of aluminum and has a suction device and a flushing device in order to expose an object lying in the sediment.
  • the flow protection tube offers the divers protection when working and allows a pointwise exposure of the object within the flow protection tube, which is why the flow protection tube can also be referred to as a diversion protection tube.
  • an inner pedestal is preferably mounted in the flow protection tube on the inner wall, which enables a diver located in the flow protection tube a firm footing when lowering and raising the flow protection tube.
  • a Portergang is arranged in the flow protection tube, which serves the diver to descend from the inner platform to the water bottom.
  • the buoyant working platform according to the invention has an acoustically operating locating device, in particular a side-scan sonar, which is configured in such a way as to create a soil profile of the body of water.
  • an acoustically operating locating device in particular a side-scan sonar, which is configured in such a way as to create a soil profile of the body of water.
  • the invention solves the above-mentioned. Problem further with a method for raising or lowering a buoyant work platform, in particular a work platform described above, by means of a lifting system with at least four hydraulically operated support members, wherein the support members are made in several parts and each have a lift arm and a support leg.
  • the lift arm For lifting or lowering the work platform, the lift arm is pivotally mounted on a workbench at a first pivot point and pivotally mounted on the support leg at a second pivot point.
  • the lifting arm is pivoted about the first pivot point by means of at least one hydraulic cylinder, so that the support leg is introduced or removed laterally from the working platform into the water by means of the hydraulically operated lifting arm.
  • the working platform is lifted by means of hydraulically operated support members from the water or deposited on the water.
  • the hydraulic pressure of the hydraulic cylinders in the support legs is further increased to lift the work platform out of the water. This is lifted out of the water only to the extent that safe working from the platform is possible.
  • the labor input is independent of weather conditions, in particular the height of the waves, feasible because the work platform is held above the water surface by the support members.
  • the work platform When the work to be done from the work platform is finished under water, the work platform is lowered back to the water by retracting the support leg extensions into the support legs and lifting the support legs out of the water.
  • the inventive design of the support members advantageously allows a uniform and rapid lifting and lowering of the working platform, whereby this can be preferably brought to Bergen or clearing objects on the riverbed flexibly and quickly from one suspicion point to the next.
  • Fig. 1 is a floating work platform according to the invention as a work vessel 2 for performing work under water, in particular for the recovery or clearing of sunken in a body of water 4 objects, such as obstacles, foreign objects, mines oa, shown.
  • the working vessel 2 floats on the water surface 6 and according to the invention has a lifting system with four support members 8, which is designed to lift the working vessel 2 from the water or to lower it to the water.
  • the support member 8 is formed in several parts and has a lift arm 10, a support leg 12 and a foot plate 14.
  • the support members 8 are displaced by means of the respective lifting arms 10 in different lifting and setting positions.
  • the work vessel 2 on board a hydraulic excavator 16 which is provided with a quick-release coupling 18 and has a counterweight, especially for water depths up to about 20 m.
  • the quick-release coupling 18 is a connection unit, which is designed such that a connection with little effort is possible. With the quick-release coupling 18 can thus advantageously different tools, such as.
  • the invention is not limited to the above-described quick connect coupling 18, but any types of connections for coupling work equipment to an excavator 16 or excavator as disclosed.
  • the support members 8 are in a transport position in which the support legs 12 are located on the deck of the work vessel 2 and are fixed.
  • Fig. 2 shows a schematic representation of a work vessel 2 with support members 8 in the transport position.
  • the support legs 12 are lifted from the side of the work boat 2 out of the water.
  • the working ship 2 moves to a specified position of a suspected point of a sunken object.
  • a soil profile of the body of water is created by means of a side-scan sonar.
  • the conditions of the body of water are transferred to a computer program of a computer control unit which controls the positioning and lowering of the support members 8.
  • To monitor the lifting operation are 14 sensors at the foot plates to detect the exact position of the foot plate 14.
  • the foot plates 14 are substantially circular in shape and have a diameter of 1 to 5 m, but preferably 3 m, and allow a stable state of the support members 8. In addition, the foot plates 14 advantageously prevent deep penetration into the sediment at the bottom of the water. To compensate for unevenness in the ground, a joint, in particular a ball joint, is arranged between the foot plates 14 and the supporting legs 12.
  • foot plates 14 are equipped with air and rinse nozzles to facilitate the detachment of the foot plates 14 from the sediment.
  • the lowering of the support members 8 is carried out with low hydraulic pressure by means of the lifting arms 10 on the longitudinal side of the working vessel 2 to the foot plate 14 are about 1 to 3 m (depending on the waves) above the water body.
  • the lifting arms 10 are pivoted laterally by means of a hydraulic cylinder about a first pivot point 24.
  • Tragbeinverinronneus 26 lowered to the bottom of the river 28. This is done either by lowering the support leg extensions 26 due to gravity or due to the arranged in the support legs 12 hydraulic cylinder.
  • the work vessel 2 If the work vessel 2 has a stable footing on the body of water 28, the work vessel 2 is lifted out of the water by increasing the hydraulic pressure through the hydraulic cylinders arranged in the support legs 12.
  • the lifting operation of the work vessel 2 is computer controlled in such a way that this process takes place very evenly.
  • the working ship 2 is vertically, straight, evenly and quickly, in particular within 2 to 3 minutes, lifted out of the water.
  • the working vessel 2 assumes a horizontal orientation in each stroke position.
  • the lowering process is analog computer-controlled and thus perpendicular, straight, even and fast.
  • the working ship 2, as it is in Fig. 3 is independent of the wave movements of the water and can keep its position accurately. Without a lifting system is a labor input, such as a diving mission for recovering an object, only up to a significant wave height of 0.8 m possible. With the lifting system according to the invention can be advantageously worked from the working vessel 2 to a wave height of 1.5 m or higher.
  • the lifting system according to the invention is further preferably used at a water depth of 0 to 20 m near the coast.
  • the support legs 12 are lowered laterally of the ship 2 to a predetermined depth, in particular about 2 m above the water bottom 28.
  • the depth of the discharged support legs 12 is dependent on the number and the length of the executable telescopic stages.
  • the telescopic stages are unlatched and sink due to gravity on the bottom of the water 28.
  • the working vessel 2 can now be lifted out of the water 4 as described above.
  • the lowering of the work vessel 2 on the water surface 6 takes place in the reverse manner.
  • the working vessel 2 is lowered by depressurizing by means of the lifting arms 10 to the water 4.
  • the telescopic stages of the support legs 12 are pulled into the Tragbein groundSuper. This is done, for example. by a drive via a traction system or by an internal hydraulic cylinder.
  • other mechanisms for retrieving the telescopic stages are applicable.
  • the lowering of the work vessel 2 is again in the reverse manner.
  • the working vessel 2 is deposited on the water 4.
  • the fixation of the anchor 30 is released on the support leg 12 and the support leg 12 is raised until the anchor 30 of the lifting arm 10 has reached the original position in the guide of the support leg 12 and the support leg 12 can be lifted by means of the lifting arm 10 from the water ,
  • the working vessel 2 For performing work under water, in particular for recovery or clearing of an object located on the body of water 28, the working vessel 2 has a working tube 20.
  • Fig. 4 shows a schematic illustration for explaining the application of the working tube 20, in which the working vessel 2 is lifted out of the water 4 and is securely on the support members 8.
  • the working tube 20 with the excavator 16, in particular excavator, connected and lowered by means of the excavator 16 and excavator arm in the water 4.
  • the working tube 20 has a diameter of 10 to 30 cm, but preferably 20 to 25 cm and is preferably connected to the on-board ship 2 hydraulic excavator 16 via a quick-release coupling 18.
  • the working tube 20 has an underwater camera, an underwater probe and suction and flushing devices.
  • the use of a sonar in the working tube is conceivable for detecting the working environment.
  • the working tube 20 is lowered into the water 4. In order to minimize the resistance load of the water flow on the excavator, this is preferably designed as a lattice boom.
  • the excavator 16 has its own GPS system in order to work with the working tube 20 coordinates true to. This makes it possible to use the underwater probe to relocalize a given suspicion point to an object in GPS coordinates.
  • the suction and flushing device allows flushing of the working tube 20 in the water bottom 28 for probing the object to determine the exact depth of the object. Furthermore, the suction and flushing device is used to expose the object in order to identify the object.
  • the working tube 20 has an interior space and a jacket area. At least one, but preferably two air ducts are arranged in the jacket area, with which compressed air is blown into the lower region of the inner space of the working tube 20. Furthermore, water lines, preferably up to four water lines, are arranged in the jacket area, with which water is flushed down from the working tube 20. By rising in the interior upwards Compressed air as well as through the downwardly directed water jet, a negative pressure is generated, whereby a flow in the interior of the working tube 20 is formed. This flow ensures that the soil material, such as sediment, is transported together with the sucked water in the interior of the working tube 20 through the working tube 20 upwards and is blown out through an outlet opening above the working tube 20.
  • water lines preferably up to four water lines
  • the procedure of the working tube 20 can be followed acoustically and visually by an operator on the working vessel 2, and possibly the object can be identified.
  • Fig. 5 is shown in a schematic representation of the use of a flow protection pipe or Tauchertikrohres 22.
  • the flow protection tube 22 is preferably formed substantially circular cylindrical with a height of 3 to 5 m, but preferably 4 m, and a diameter of 2 to 3 m, but preferably 2.5 m.
  • the working tube 20 is uncoupled from the excavator arm and coupled via the quick release 18, the flow protection tube 22 to the excavator 16.
  • the flow protection tube 22 is then lifted to the curb of the work vessel 2, so that a diver can enter an inner platform in the flow protection tube 22.
  • the flow protection tube 22 is parked with the diver centered on the object on the body of water 28.
  • the precise control of the movement also takes place here by means of the GPS system of the excavator 16.
  • the diver can descend from the interior pedestal to the bottom of the water via a ladder gear and carry out the identification of the object visually and / or by careful scanning or the exposure of the object by careful digging or rinsing.
  • This process can be advantageously monitored via a camera on the diving helmet by an operator on board the work vessel 2.
  • flow protection technology such as a flow protection tube 22 described above, advantageously also allows diving at the river bottom 28 at a flow velocity of the water body 4 of more than 0.6 m per second.
  • the object is a weapon or warfare agent
  • the object is mounted in a container or directly on the flow protection tube 22 to safely lift the object or, if necessary, blasted directly in place.
  • salvage can also take place via a clamshell grab, which is fastened to the excavator 16 by means of the quick-action coupling 18.
  • the object is gripped with the clamshell grab and lifted aboard the workboat 2, where it can be safely stored.
  • the movement of the clamshell bucket can be controlled by means of the GPS system of the hydraulic bucket 16.
  • a probing of the body of water 28 takes place by the diver or by means of the working tube 20. If the salvage or evacuation is completed to a suspicion point on the river bottom 28, all work equipment is secured on board the work vessel 2, stored and the working vessel 2 by means of the support members 8 again deposited on the water surface 6. After lifting the support legs 12 these are fixed in a transport position. The working vessel 2 can now drive to the next suspicion point and the procedure starts again.
  • the device according to the invention or the method according to the invention advantageously increases the productivity of working underwater, in particular diving work on the bottom of the water.
  • the computer-assisted, hydraulically operated, spider-leg-like supporting elements 8 advantageously increase the independence from weather influences, in particular from the height of the waves.
  • the lowering of the support legs 12 side of the work vessel 2 provides more stability and possibly allows the use of a narrower work vessel 2 than the prior art provides.
  • a working tube 20 according to the invention and a flow protection tube 22 according to the invention also advantageously increases independence from the tidal current. As a result, the work and process productivity and thus the efficiency of the labor input are advantageously increased.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Earth Drilling (AREA)
EP14164067.2A 2013-04-26 2014-04-09 Plate-forme de travail flottable dotée d'un système de levage et procédé destiné à lever ou à abaisser une telle plate-forme de travail flottable Active EP2796619B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102013104278.3A DE102013104278B4 (de) 2013-04-26 2013-04-26 Schwimmfähige Arbeitsplattform mit einem Hubsystem und Verfahren zum Verrichten von Arbeiten unter Wasser

Publications (2)

Publication Number Publication Date
EP2796619A1 true EP2796619A1 (fr) 2014-10-29
EP2796619B1 EP2796619B1 (fr) 2016-11-16

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EP14164067.2A Active EP2796619B1 (fr) 2013-04-26 2014-04-09 Plate-forme de travail flottable dotée d'un système de levage et procédé destiné à lever ou à abaisser une telle plate-forme de travail flottable

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EP (1) EP2796619B1 (fr)
DE (1) DE102013104278B4 (fr)

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CN106498917A (zh) * 2016-09-20 2017-03-15 武汉船用机械有限责任公司 自升式平台的升降装置及其滚轮机构
CN108265776A (zh) * 2018-01-26 2018-07-10 芜湖市皖南造船有限公司 一种绞吸式挖泥船定位装置
CN108407975A (zh) * 2018-04-19 2018-08-17 王鹤海 一种船艇的锚定机构及应用其的船艇
CN111411652A (zh) * 2020-05-13 2020-07-14 三一重机有限公司 一种支撑机构及挖掘装载机

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DK3255211T3 (en) 2016-06-10 2019-02-25 Neptun Ship Design Gmbh Jack-bridge structure
DE102020120707A1 (de) 2020-08-05 2022-02-10 Rwe Renewables Gmbh Ankersystem zum Verankern eines Offshore-Bauwerks
CN112177082A (zh) * 2020-10-09 2021-01-05 安徽畅达建筑工程有限公司 一种河道清淤装置
CN112538876B (zh) * 2021-02-01 2022-04-12 江生金 一种具有搅拌功能的水利工程快速清淤装置

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US20120060742A1 (en) * 2010-09-13 2012-03-15 Hewitt Machine & Mfg. Inc. On board lift leg construction for pontoon boats with onboard engine

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CN106498917A (zh) * 2016-09-20 2017-03-15 武汉船用机械有限责任公司 自升式平台的升降装置及其滚轮机构
CN108265776A (zh) * 2018-01-26 2018-07-10 芜湖市皖南造船有限公司 一种绞吸式挖泥船定位装置
CN108407975A (zh) * 2018-04-19 2018-08-17 王鹤海 一种船艇的锚定机构及应用其的船艇
CN111411652A (zh) * 2020-05-13 2020-07-14 三一重机有限公司 一种支撑机构及挖掘装载机

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DE102013104278B4 (de) 2018-05-09
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