Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
  • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
  • B63B25/00—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby
  • B63B25/02—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods
  • B63B25/08—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid
  • B63B25/12—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid closed
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
  • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
  • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
  • F17C2205/01—Mounting arrangements
  • F17C2205/0153—Details of mounting arrangements
  • F17C2205/0192—Details of mounting arrangements with external bearing means

Definitions

• the invention relates to a saddle support for a prone cylindrical tank of circular cross section, or a twin tank formed by two prone cylinders of circular cross section, whose axes are parallel with the tank axis, the cylinders intersecting and joining to form an outwardly unified, single tank.
• the object of the invention is to enable the tanks to contract/expand without clearances occurring that would result in a redistribution of the cargo contained in the tank.
• the saddle support with a central fixed point, whereby the tank is prevented from movements in the transverse plane, and to provide discrete bearing surfaces on each side of the fixed point.
• the bearing surfaces are parallel with the longitu ⁇ dinal axis of the tank, and are disposed at respective inclinations lying in a plane that passes through said fixed point, said respective bearing surfaces cooperating with corresponding bearing surfaces on the tank.
• Each saddle support therefore, has at least three bearing points.
• several bearing points or surfaces are provided on each saddle.
• a saddle support formed as disclosed in this patent specifi ⁇ cation permits the object of the invention to be realized, namely, the tank can contract/expand without clearances occurring that would result in a redistribution of the cargo at any of the discrete bearing points. Calculation of stresses and the selection of material thicknesses can there ⁇ fore be determined with a far greater degree of reliability, which also enables one to construct larger tanks than the conventional tanks in the prior art.
• two saddle supports are normally provided in the longitudinal direction of the tank.
• the tanks are prevented from longitudinal movement by one of the saddles. This restraint is most simply provided at the fixed point of the saddle in question.
• supplemental limiting means for preventing longitudinal displacement may also be provided at the other bearing points of the saddle.
• the sliding surfaces must be able to absorb movements that have a component in the tank's longitudinal direction as well as in the transverse direction.
• the latter component increases with increasing distance from the fixed point.
• Suitable combinations of materials for the sliding surfaces are selected to provide high surface pressure and low friction, e.g., polished stainless steel against teflon-coated steel or the like. It will be preferable to provide some form of insulation at the bearing points.
• the rods can be formed of a material which is a poor conductor of heat, for example, stainless steel.
• the tanks are restrained in the vertical direction by suit ⁇ able means, preferably by cooperating sliding surfaces , see for example Norwegian Patent Application No. 78 3348.
• Figure 1 is a schematic drawing of a ship in cross section, with a saddle-supported twin tank.
• Figure 2 shows a cutaway portion of a bearing point
• Figure 3 shows a cutaway portion of a second possible embodi ⁇ ment of a bearing point.
• Figure 1 shows a twin tank 1 constructed of two prone cylinders 2,3 of circular cross section whose axes are parallel with the tank axis, which in this case coincides with the centerline of the ship 4.
• the cylinders 2,3 inter ⁇ sect each other, joining' together to form an outwardly unified single tank 1.
• Figure 1 illustrates two embodiments of a saddle support, one on the right-hand half of the drawing and the other on the left-hand half of the drawing.
• the saddles will be symmetrical mirror images of each other about the longi ⁇ tudinal central plane of the ship through the ⁇ enterline ⁇ .
• the embodiment shown on the left-hand side of Figure 1 is a saddle support having three bearing points, viz., the central fixed point 5, the bearing point 6, and the corresponding bearing point 7 on the right-hand side.
• FIG. 1 The embodiment shown on the right-hand side of Figure 1 is a saddle support having a plurality of bearing points 7-14 on each side of the central fixed point 5, which acts as a bearing as well. All bearing points have bearing surfaces that are parallel with the tank's longitudinal axis (vertical on the plane of the paper). , and are disposed at respective inclinations that lie in a plane passing through the fixed point 5. In Figure 1 the planes of inclination for the bearing points 7, 11 and 14 are shown, as indicated by the lines 15, 16 and 17.
• OMPI surfaces like those at 18 could be used.
• Other known restraining means could also be utilized, as long as they do not hinder the tank's contraction/expansion and movement in the longitudinal direction.
• the separate bearing points can be made as sliding bearings, but it is also possible to utilize cylindrical or spherical bearing members 20 (roller bearings) , as shown in Figure 2, or short rods 21 with cylindrical or semi-spherical end surfaces, as shown in Figure 3.
• the disposition of the curved surfaces could also be reversed, i.e., the curved surfaces could be found on the tank and foundation, and the rods would then have straight cut ends.
• Cooperating surfaces which are both curved (ball race), could also be utilized.

Landscapes

• Chemical & Material Sciences (AREA)
• Engineering & Computer Science (AREA)
• Combustion & Propulsion (AREA)
• Mechanical Engineering (AREA)
• Ocean & Marine Engineering (AREA)
• Filling Or Discharging Of Gas Storage Vessels (AREA)
• Support Of The Bearing (AREA)

Priority Applications (3)

Applications Claiming Priority (1)

Publications (1)

Family

ID=19886750

Family Applications (1)

Country Status (6)

Cited By (9)

Citations (13)

• 1982
  • 1982-10-11 NO NO823400A patent/NO151842C/no unknown
• 1983
  • 1983-10-11 GB GB08412068A patent/GB2136740A/en not_active Withdrawn
  • 1983-10-11 DE DE19833390283 patent/DE3390283T1/de not_active Withdrawn
  • 1983-10-11 NL NL8320309A patent/NL8320309A/nl unknown
  • 1983-10-11 WO PCT/NO1983/000043 patent/WO1984001553A1/en active Application Filing
• 1984
  • 1984-06-12 DK DK285984A patent/DK285984A/da not_active Application Discontinuation

Patent Citations (13)

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