Classifications

• • 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
  • E02F9/062—Advancing equipment, e.g. spuds for floating dredgers
• • E—FIXED CONSTRUCTIONS
  • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
  • E02F—DREDGING; SOIL-SHIFTING
  • E02F5/00—Dredgers or soil-shifting machines for special purposes
  • E02F5/006—Dredgers or soil-shifting machines for special purposes adapted for working ground under water not otherwise provided for
• • 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
• • 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
  • E02F9/08—Superstructures; Supports for superstructures
  • E02F9/085—Ground-engaging fitting for supporting the machines while working, e.g. outriggers, legs

Definitions

• Invention relates to a support leg arrangement of a work machine, like a dredger meant to work in water systems in which arrangement the support legs are meant to extend to the bottom of the water system in order to keep the work machine in its place during the working in which case at least one pair of support legs consists of arms which are attached to the work machine at their upper end with the help of a joint and the mentioned arms can be turned underneath the water surface with the help of a power device, such as a hydraulic cylinder when the lower ends of the arms are meant to extend to the bottom of the water system and that the lower ends of the arms are equipped with an expanded part, such as with an air container or a paw resting on the bottom.
• a power device such as a hydraulic cylinder
• a support leg arrangement of a work machine according to the above preamble is earlier known for example for dredgers with a trade name called WATERMASTER ® .
• WATERMASTER ® a trade name
• the support legs which can be turned underneath the water surface, cannot usually be turned in such a way that their arms would become vertical underneath the water, too.
• the vertical support leg would then be located at the bottom too near the working area of the work machine and nearly underneath the work machine.
• the second reason is the fact that the vertical arm of the support leg results in an unstable support especially when extensive sideway loads are directed to the work machine.
• the third reason is the fact that when the turning of the support leg occurs with the help of a hydraulic turning cylinder from a vertical transport position down underneath the water surface, the turning angle of 180° cannot be achieved with a normal structure.
• the advantage of the invention is the fact that the support leg pair stays stable when the arms of the support legs, also when they are equipped with extension parts, still clearly stay askew even when they are turned downwards into an extreme position.
• the expansion parts located at the lower ends of the legs are easy to equip with anti-skid devices and/or with a supporting structure in which case grip can be gained in sideway direction. With the anti-skid devices which are placed in the right way more reach can be gained downwards especially when the support legs are at their extreme position.
• the extension parts of the support legs are added to be an extension of the basic arm in such a way that an angle, for example of 110 - 160°, is formed between the basic arm and the extension part, the expansion part and the anti-skid devices attached to it stay essentially at the same advantageous position when the arm is at its extreme position whether the extension part is attached or not. Also the distance of the expansion parts of the lower ends of the support legs from each other stays the same whether the extension part is added or not.
• Figure 1 shows a work machine movable in the water seen from the front when the
• Figure 2 shows the work machine of the figure 1 when the extension parts are attached to the support legs.
• Figure 3 shows the work machine as a side view.
• Figure 4 shows an expansion part of the lower end of the support leg.
• Figure 5 shows another expansion part of the lower end of the support leg.
• Figure 6 shows diagrammatically the turning movement of the support leg equipped with an anti-skid device.
• Figure 7 shows diagrammatically the turning movement of the support leg equipped with an anti-skid device and an extension part.
• Figures 8 - 10 show the expansion part when it is equipped with anti-skid devices and strengthening structures.
• FIG 1 there is a work machine 1 , such as a dredger, shown from the front when all the support legs and the rear legs 7 and the front legs are located at the lowest position.
• the rear legs 7 are profiles, most advantageously quadrangular tubes, which are pressed to the bottom in their direction.
• the front legs are formed of arms 3 which can be turned with the help of cylinders 2 and are formed of expansion parts, such as air containers 4 with a form of an ellipsoid, which are attached to their lower end and are resting on the bottom.
• a short arm is attached to the air container 4 as an attaching part 5 with which the air container 4 is attached to the sleeve of the lower end of the arm 3. The sleeve is adjusted to receive the attaching part 5.
• the attachment is locked for example with the help of a peg which is pushed into a hole line which penetrates both parts.
• the arms 3 are lifted up to a transport position with the help of cylinders 2 and they can be pressed downwards into the lowest extreme position, such as it is shown in the figure 1.
• the support legs stay askew enough at the extreme position and stay far enough 2 x D from each other so that they don't prevent the working at the bottom in front of of the work machine 1 and underneath its front part.
• the front legs reach into the depth HI which is already fairly close to the depth into which one can reach with the leg structure.
• extension parts 6 are added to the foremost support legs.
• the extension part 6 is added to be an extension of the attaching part 5 of the air container 4.
• the extension part 6 is for example a quadrangular tube the lower end of which quadrangular tube is adjusted to receive also the
• the upper end of the extension part 6 is adjusted to be pushed into a quadrangular sleeve located at the lower end of the arm 3.
• the upper end of the extension part 6 has the same size and structure as the attaching part 5 belonging to the expansion part.
• Angle a which is formed between the arm 3 and the extension part 6 of the support leg is adjusted to the range between 110 - 160°. If the extension part 6 continued the arm 3 in the direction of the arm 3, the support legs would be located further from each other at the bottom and this would increase the power required by the cylinder 2.
• the distance of the support legs from each other 2 x D is the same as in the situation of the figure 1 although the extension parts 6 have been added.
• FIG 3 there is a work machine 1 shown as a side view when the front legs are equipped with extension parts 6.
• the rear legs 7 can be turned in horizontal direction into a transport position on top of the work machine with the help of the cylinder 9.
• the quadrangular leg profile 7 can be moved in a sleeve part located in a turning body 8 in which case the legs 7 can be lifted and lowered in their direction according to the figure 3.
• a set of bars 10 is installed in the work machine 1 on which set of bars a suction dredging head 11 hinges.
• Figure 4 shows the expansion part to be attached to the front legs which expansion part is a convex paw 12.
• Figure 5 shows a curvilinear paw 13 as another version.
• Figures 6 and 7 show diagrammatically the foremost support leg without the extension part 6 and with the extension part 6.
• an anti-skid device 14 with a plate structure is attached to the air container, 4 functioning as an expansion part located in such a way that it functions as in the figures 6 and 7 as a structure increasing the reach downwards.
• Structures 15, such as band steels which have been welded into a form of a lattice onto the lower surface of the container, strengthening the lower surface of the container 4 and also functioning as antiskid devices have also been added to the air container 4.
• Anti-skid devices 14 and strengthening structures 15 according to the figures 8 - 10 can also be attached to the paws 12 and 13 according to the figures 4 and 5.
• the anti-skid devices 14 are located underneath the paws 12 and 13 in such a way that they increase the reach downwards mostly just at the lowest extreme position of the support leg.
• the extension parts of the support leg can be attached in different ways to the end of the arm. Although in this described implementation example only one advantageous solution has been shown, many modifications are possible.

Landscapes

• Engineering & Computer Science (AREA)
• Mining & Mineral Resources (AREA)
• Civil Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Structural Engineering (AREA)
• Mechanical Engineering (AREA)
• Details Of Rigid Or Semi-Rigid Containers (AREA)
• Vehicle Cleaning, Maintenance, Repair, Refitting, And Outriggers (AREA)
• Treatment Of Fiber Materials (AREA)
• Cultivation Receptacles Or Flower-Pots, Or Pots For Seedlings (AREA)

Priority Applications (1)

Applications Claiming Priority (2)

Publications (1)

Family

ID=43806392

Family Applications (1)

Country Status (3)

Cited By (2)

Citations (2)

Family Cites Families (3)

• 2011
  • 2011-03-15 FI FI20110091A patent/FI127384B/fi active IP Right Grant
• 2012
  • 2012-03-15 WO PCT/FI2012/000015 patent/WO2012123622A1/en active Application Filing
  • 2012-03-15 EP EP12756996.0A patent/EP2686492B1/en not_active Not-in-force

Patent Citations (2)

Non-Patent Citations (2)

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