Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
  • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
  • B63B19/00—Arrangements or adaptations of ports, doors, windows, port-holes, or other openings or covers
  • B63B19/12—Hatches; Hatchways
  • B63B19/14—Hatch covers
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
  • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
  • B63B19/00—Arrangements or adaptations of ports, doors, windows, port-holes, or other openings or covers
  • B63B19/12—Hatches; Hatchways
  • B63B19/14—Hatch covers
  • B63B19/18—Hatch covers slidable
  • B63B2019/185—Hatch covers slidable with sliding bearings

Definitions

• the invention relates to a support combination for the hatch covers on container ships, in which the hatch covers are heavily loaded by containers stacked on them.
• the combination of supports consists of an upper support, which is attached to the hatch cover, and a lower support, which is fixedly attached to the ship, a large number of these support pairs supporting a hatch cover placed over a hatch.
• 18.8 x 8 m 6 containers can be stacked in 4 layers.
• B. each weigh 30 t, which results in a static load of approx. 720 t, which is distributed over, for example, 16 pairs of supports on the hatch cover.
• the dynamic load from this load that occurs in rough seas is significantly higher, with horizontal forces also occurring which would cause the upper supports on the lower supports to shift by up to 20 mm with large torsional movements of the ship, which causes wear on the supports .
• the invention has for its object to provide a Auflagerk ⁇ nbination in which the unavoidable wear can be controlled and in which worn parts can be replaced in a simple manner.
• one support should be selected from a hard, wear-resistant .teterial and the other support should be made in two parts, wherein it consists of a base body and a wear part which is fastened to the base body in an exchangeable manner, but with this is secured against displacement in all directions of the contact plane between the two supports.
• the support made of wear-resistant material is preferably firmly attached to the hatch bench as the lower support, while the base body is firmly connected to the wearing part as the upper support to the hatch cover.
• the wear part expediently engages in a form-fitting manner with an elongated pin in a recess in the base body and is held together by means of screws.
• the lower support is preferably a plate that is welded to the hatch bench and made of a chrome-nickel steel, e.g. CrNi 18.9. Other hard refined or hardened steels are possible.
• the wearing part is made of ordinary steel, e.g. B. St 37, manufactured and the base body can consist of the same material.
• the wear occurring on the wearing part is easy to see. It can vary from hatch to hatch depending on the torsional movements of the ship and the loading of the hatch covers. If the wear parts of a hatch have to be replaced, this can easily be done by the crew during a loading process in which the hatch covers are removed and stacked, with only the screws between the wear parts and the base bodies having to be loosened and new wear parts having to be screwed on. It is advantageous here if the base body and the wearing part are attached to the hatch cover, since the hatch covers are stacked on board for the loading process, a distance being usually left between them such that replacement of the wearing parts is possible without risk. The replacement can therefore be carried out by the crew themselves without any loss of time for the ship due to a dockyard time.
• FIG. 1 shows a section through a lateral edge area of a hatch cover and the hatch filling construction supporting it with a support combination
• FIG. 2 shows a side view of a hatch cover with a support combination
• FIG. 3 is a perspective view of the parts of a support combination.
• hatch fill 2 On deck 1 is hatch fill 2, on which hatch bench 3 lies approximately horizontally.
• the parts and used support plates 4 and 5 are welded together.
• the hatch cover 10 has at its edge an approximately vertically arranged hatch filling 11, on the lower edge of which, for. T. an approximately horizontal bearing flange 12 is welded and supported by support plates 13, while another part of the hatch cover edge 14 is only a short distance of z.
• B. 10 mm to the top of the hatch bench 3.
• a rubber seal 16 is attached to brackets 15, which rests lightly compressed on the hatch bench 3 when the hatch cover is closed.
• a container foundation 18 On the top of the hatch cover 10, a container foundation 18 is shown, which is used for stacking the containers on the hatch cover 10.
• a cut sheet 17 supports the support flange 12 on the support.
• a plate made of wear-resistant chromium-nickel steel is welded onto the hatch bench as the lower support 20.
• the upper support 21, which consists of the base body 22 and the wearing part 23, is arranged under the support flange 12.
• the base body 22 is welded to the bearing flange 12 and has a recess 24 in the form of an elongated hole at the bottom.
• An elongated pin 25 is integrally formed on the top of the wearing part 23, which is inserted in a form-fitting manner into the recess 24, so that the wearing part 23 cannot move with respect to the base body 22.
• the wearing part 23 is held on the base body 22 by two or more screws 26, the screws 26 running through the pin 25 and being able to be screwed in so far that they do not become damaged when wear occurs on the underside 27, as long as the wear is not a permissible level exceeds.
• the permissible wear results from the maximum permissible compression of the rubber seal 16 and from the requirement of a distance between the hatch cover edge 14 and the hatch bench 3 to keep.
• the rubber seal was compressed by 8 mm for optimal installation on the hatch bench 3, whereas if the compression was more than 16 mm there was already a risk of damage to the seal.
• wear parts were chosen which (without the pin) were approx. 12.5 mm thick.
• suitable dimensions must be chosen from case to case.
• the illustrated version of hatch and hatch bench is also only one example that can be modified as required, in particular other attachments and shapes of the base body are possible on the hatch.
• the lower support 20 or its top surface expediently has such a large area that the underside 27 of the wearing part 23 always rests completely on the top side 28 even when there are displacements between the two supports, so that there is even abrasion of the wearing part 23 while at the bottom Bearing 20 practically no wear occurs.
• the pin connection shown with an elongated pin 25 is preferred.
• the molded on the wearing part 23 pin 25 can be inserted into the recess 24 with slight play and its height is a little smaller than the depth of the recess, so that the pin 25 can not be compressed even by large loads and the wearing part 23 again easily remove
• Pin 25 is intended to transmit only the horizontal component of the forces acting on the upper support 21 to the wearing part 23. However, it is possible to use several pins, or those whose shape may differ from the version shown.
• a steel alloy is preferred for the lower support 20, which not only has a high wear resistance, but also a high corrosion resistance to sea water and in particular does not rust.
• the base body 22 can also consist of rustproof, seawater-resistant material.
• the wear In contrast, part 23 need not be corrosion-resistant and can be formed from simple steel or another material whose wear or abrasion resistance is less than that of the other support 20.

Landscapes

• Chemical & Material Sciences (AREA)
• Engineering & Computer Science (AREA)
• Combustion & Propulsion (AREA)
• Mechanical Engineering (AREA)
• Ocean & Marine Engineering (AREA)
• Sealing Devices (AREA)
• Ship Loading And Unloading (AREA)
• Cleaning Or Clearing Of The Surface Of Open Water (AREA)
• Load-Engaging Elements For Cranes (AREA)

Applications Claiming Priority (1)

Publications (1)

Family

ID=6175374

Family Applications (1)

Country Status (3)

Cited By (3)

Families Citing this family (2)

Citations (3)

Family Cites Families (1)

• 1982
  • 1982-10-09 DE DE19823237529 patent/DE3237529A1/de active Granted
• 1983
  • 1983-10-05 WO PCT/DE1983/000169 patent/WO1984001552A1/de not_active Ceased
  • 1983-10-05 EP EP83903171A patent/EP0120903B1/de not_active Expired

Patent Citations (3)

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