US3612333A - Securement system using loose keys for independent storage tanks - Google Patents

Securement system using loose keys for independent storage tanks Download PDF

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Publication number
US3612333A
US3612333A US15040A US3612333DA US3612333A US 3612333 A US3612333 A US 3612333A US 15040 A US15040 A US 15040A US 3612333D A US3612333D A US 3612333DA US 3612333 A US3612333 A US 3612333A
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Prior art keywords
keyways
tank
container
key
bearing
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Walter C Cowles
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ExxonMobil Technology and Engineering Co
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Exxon Research and Engineering Co
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D90/00—Component parts, details or accessories for large containers
    • B65D90/02—Wall construction
    • B65D90/08—Interconnections of wall parts; Sealing means therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D90/00—Component parts, details or accessories for large containers
    • B65D90/12—Supports
    • 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
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/08—Mounting arrangements for vessels
    • F17C13/082—Mounting arrangements for vessels for large sea-borne storage vessels
    • 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
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/01—Shape
    • F17C2201/0147—Shape complex
    • F17C2201/0166—Shape complex divided in several chambers
    • 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
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/01—Shape
    • F17C2201/0147—Shape complex
    • F17C2201/0171—Shape complex comprising a communication hole between chambers
    • 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
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/05—Size
    • F17C2201/052—Size large (>1000 m3)
    • 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
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/01—Reinforcing or suspension means
    • F17C2203/014—Suspension means
    • 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
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/03—Thermal insulations
    • 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
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/03—Thermal insulations
    • F17C2203/0304—Thermal insulations by solid means
    • F17C2203/0354—Wood
    • 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
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
    • F17C2203/0602—Wall structures; Special features thereof
    • F17C2203/0612—Wall structures
    • F17C2203/0626—Multiple walls
    • F17C2203/0629—Two walls
    • 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
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
    • F17C2203/0634—Materials for walls or layers thereof
    • F17C2203/0636—Metals
    • F17C2203/0646—Aluminium
    • 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
    • F17C2205/018—Supporting feet
    • 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
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/03—Mixtures
    • F17C2221/032—Hydrocarbons
    • F17C2221/033—Methane, e.g. natural gas, CNG, LNG, GNL, GNC, PLNG
    • 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
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
    • F17C2223/0146—Two-phase
    • F17C2223/0153—Liquefied gas, e.g. LPG, GPL
    • F17C2223/0161—Liquefied gas, e.g. LPG, GPL cryogenic, e.g. LNG, GNL, PLNG
    • 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
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/03—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the pressure level
    • F17C2223/033—Small pressure, e.g. for liquefied gas
    • 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
    • F17C2260/00—Purposes of gas storage and gas handling
    • F17C2260/01—Improving mechanical properties or manufacturing
    • F17C2260/015—Facilitating maintenance
    • 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
    • F17C2260/00—Purposes of gas storage and gas handling
    • F17C2260/01—Improving mechanical properties or manufacturing
    • F17C2260/016—Preventing slosh
    • 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
    • F17C2270/00—Applications
    • F17C2270/01—Applications for fluid transport or storage
    • F17C2270/0102—Applications for fluid transport or storage on or in the water
    • F17C2270/0105—Ships

Definitions

  • the present invention relates in the broadest sense to the storage and transportation of liquids such as liquefied natural gas, hereinafter referred to as LNG, at extremely low tempera tures well below ambient temperature and at essentially atmospheric pressure. More particularly, the present invention is concerned with a novel and improved system for securing storage tanks carrying LNG or the like in large quantities within a moving vehicle such as a tanker and wherein the system uses loose keys.
  • prior art securement arrangements have been found to be unsatisfactory in many respects.
  • prior art securernent systems for mounting containers in a tanker have relied upon vertically disposed key-keyway arrangements.
  • These prior art arrangements have not only been relatively complex and costly to construct, but have been ineffective in providing an equalized distribution of stress concentrations along the entire key-keyway structure. This is because the key-keyway is located at the vertical center of the container sidewalls and therefore, the stress is concentrated at one or two localized points which normally are at either end of the key. Thus, the possibility of local failure where greater stress concentrations occur is greatly increased. Since these arrangements are structurally inefficient the consequence is a substantial increase in the cost.
  • the present invention overcomes both these and other prior art deficiencies by providing a novel and improved arrangement for securing independent storage tanks or containers in position in a tanker or vehicle of transportation, while allowing for contraction or expansion of the container caused by the loading of the cargoes, such as LNG, at lower than ambient temperature.
  • the system comprises essentially an arrangement of keys, keyways and bearer supports located at the bottom of the container in directions corresponding to and along the longitudinal and transverse centerlines of the tank. Specifically, a lower keyway and container support pedestal are secured to the inner bottom wall of the tankers hull. A matching keyway and container bearing member are secured to the underside of the container.
  • loose key preferably made of fabricated steel
  • the containers bottom or lower keyways are designed so that its width is wider than they key at ambient temperature by an amount carefully calculated to correspond to the amount of thermal contraction that occurs when the container is cooled to the temperature of the cargo. Thus, at operating temperature the key will fit neatly in the keyway.
  • the containers may be further supported by additional bearer members and support pedestals located near the outboard sides of the container.
  • a second key and keyway system located at the top of the container extending in a direction on the longitudinal centerline thereof.
  • the keyways secured to the top of the container are constructed to suit the dimension of the key when the container is cold.
  • Matching keyways are secured to the underside of the deck and these upper keyways are fitted only in alternate bays formed between adjacent deck girders.
  • the keys are designed to be shorter than the distance between the adjacent girders to facilitate their insertion into the keyway.
  • a significant feature of the present invention comprises the use of loose keys which permits the keys and keyways to be machine finished under workshop conditions prior to final installation. Also, the use of loose keys permits the withdrawal of the keys for inspection and repair if required. By virtue of the fact that the present arrangement provides for equal distribution of forces, the stress concentrations are evenly distributed on the container and consequently the possibilities of failure associated therewith are substantially reduced. Further, the use of loose keys as compared to integral formed male tenons simplifies and expedites construction of the storage containers.
  • Another object of this invention is to provide a novel and improved system for securing independent storage container and which uses loose keys.
  • a further object of this invention is to provide a novel and improved key-keyway system for securing a storage container in a cargo hold of a vehicle and wherein there is equal distribution of stress concentrations along the container.
  • FIG. 1 is a transverse cross-sectional view taken substantially along the line 1-1 in FIG. 2 ofa tanker in which the new and improved system for mounting a storage container according to the principles of the present invention has been installed;
  • FIG. 2 is a bottom plan view taken substantially along the line 22 in FIG. 1 of the storage container partially broken away;
  • FIG. 3 is a top plan view taken substantially along the line 33 in FIG. 1 illustrating a portion of the top of the storage container embodying the features of the present invention
  • FIG. 4 is a enlarged cross-sectional view taken substantially along the line 44 in FIG. 3 showing details of construction of a top key-keyway arrangement constructed in accordance with the present invention
  • FIG. 5 is an enlarged cross-sectional view taken substantially on the line 5-5 in FIG. 2 illustrating details of construction of a bottom key-keyway-bearer arrangement constructed in accordance with the present invention.
  • FIG. 6 is an exploded perspective view illustrating a bottom key-keyway-bearer arrangement embodying the principles of the present invention.
  • the present invention is disclosed in combination with a cryogenic storage container for storing liquefied natural gas (LNG) or the like at atmospheric pressure, such as disclosed in the US. Pat. ofClarke et al., No. 3,319,431, issued May 16, I967, and assigned to the assignee of the present invention, wherein the container is fully disclosed and to which reference may be had for a more complete understanding thereof.
  • LNG liquefied natural gas
  • FIG. 1 a storage container 10 which is installed in a double-hulled tanker 11 (although a single-hulled tanker may be suitable) having an outer hull 12 and an inner hull 13 which are maintained in separated spaced relationship by structural members 14 and which defines a cargo hold space I5.
  • the container 10 includes an inner tank 16 which constitutes a primary barrier having the general shape of the cargo hold 15 and which is fabricated from aluminum, stainless steel, high nickel steel, aluminum alloy or a like material which is capable of withstanding the thermal stresses induced by the cryogenic cargoes.
  • the inner tank 16 is enclosed by a similarly shaped and designed outer tank 17 which constitutes an outer or secondary barrier and also, as with the inner tank 16, is fabricated from a material such as aluminum or the like which is not deleteriously affected by the extremely cold temperatures of the cryogenic cargoes.
  • the tanks 16 and 17 are maintained in space relation by means of rigid spacing members 18 secured therebetween.
  • the double-walled tank or storage container 10 is provided about its outer surface with an exterior layer of thermal insulation 19. It will be understood by those skilled in the art that for purposes of the present invention the layer of insulation I0 may be located otherwise than as illustrated. For example, it may be situated along the inner hull of the tanker ll. Briefly referring to the internal construction of the tank 10, there is illustrated as impervious longitudinal bulkhead 20 that is effective to prevent sloshing of the LNG cargo from side-to-side within the tank.
  • the tank also includes horizontal flats 21 and 22 which include a plurality of apertures 23 and 24, respectively, to permit drainage and circulation.
  • the tank 10 properly is secured in position within the cargo hold 15 of the double-hullcd tanker 11 by means of a bottom key-keyway-bearer system generally designated 25 and a top key-keyway system generally designated 26. Also, to further provide support for the tank 10 there is provided at the tank bottom a plurality of bearer/support arrangements generally designated 27 situated near the outboard sides of the tank.
  • the system 25 comprises a plurality of keywaybearer means 28, one pair being longitudinally disposed and a second pair being transversely or laterally disposed keyways, each of the pairs located along lines corresponding to the respective centerlines of the tank 10 as best illustrated in FIG. 2.
  • the keyway-bearer 28 comprises a lower keyway or elongated channel 29 secured to the underside of the tank 10. See FIGS. 2 and 5.
  • the keyway 29 is formed by a pair of laterally spaced keyway vertical bearing members 30, which are made of balsa wood, fir or other suitable material, which extend the length of the members 30 and are located adjacent to tank bottom, and that properly are secured in place by means of support brackets 31 which are suitably fastened at one end to the bottom of tank 10 and at the other end to the vertical bearing member 30.
  • brackets 31 comprise the same material as that for the tank which may be made of aluminum, 9 percent nickel steel or any other suitable material.
  • a lateral bearing block 32 which is made of wood, laminated phenolic (micarta) or any other suitable material and has an outer contact bearing surface 33.
  • a contact bearing surface 34 made of a material such as micarta, stainless steel, or the like, to vertically provide support for the tank It) and any cargo contained therein.
  • a pair of keywaybearer support means 28' comprising a pair of laterally spaced elongated hollow keyway support stools 35, which comprise preferably 9 percent nickel steel or some other suitable material such as aluminum, etc.
  • a pair of keywaybearer support stools 35 which comprise preferably 9 percent nickel steel or some other suitable material such as aluminum, etc.
  • At the top or upper surface of each of the support stools 35 there is secured vertical contact bearing surfaces 36, which are similar to the bearing surfaces 34 described heretofore.
  • the support stools 35 are properly secured in place adjacent the inner bottom of the tanker by means of support brackets 37, which are similar to the support brackets 31 for the bearer members 30.
  • the support stools 35 are disposed such that when the tank 10 is mounted in the tankers cargo hold I5 the bearing surfaces 36 of the stools 35 will align in contact with the corresponding bearing surfaces 34 of the vertical bearing member 30.
  • the spacing between the lateral bearing blocks 38-38, as illustrated in FIG. 5, defines an elongated channel or keyway 40 having a width that is slightly smaller than that between the lateral bearing blocks 3232 for reasons to be described hereinafter.
  • a pair of spaced support blocks 41 of suitable wood material which are located between opposing inner faces of the support stools 35 inwardly of the lateral contact surfaces 39.
  • These blocks dl provide vertical support for elongated hollow steel key 32 having a rectangular end cross section and which is to be slidably inserted into the channel formed by the keyways 29 and d ll upon mounting the tank It) in the tankers cargo hold M.
  • the spacing between lateral bearing blocks -38 is such as to provide a relatively close fit for the key 42.
  • the keyway width defined between the lateral bearing blocks 32-32 secured to the tank It) is such that it is wider than the corresponding key width at ambient temperature by an amount carefully calculated to correspond to the thermal contraction when the tank MI is cooled to the temperature of the cryogenic cargo.
  • the key 42 will fit neatly in the keyway 29 defined between lateral bearing blocks 32-32.
  • the tank llll further is supported vertically by additional bearing members 43 (similar to bearing members 3d) and support pedestals M (similar to support stools 35) which extend longitudinally near the outboard sides of the tank, as best illustrated in FIG. 2.
  • Each of the bearing members $3 is suitably secured to the underside of the tank 10 and is provided with a contact bearing surface 45 that is similar to the bearing surfaced 3d, and each of the support stools or pedestals MI is provided with a contact bearing surface as which is similar to the bearing surfaces 36. As shown in FIG.
  • the tank 110 further is secured from undesirable movement by means of the longitudinal extending top key-keyway means 47 (secured to the tank) and 47' (secured to the deck 49) which comprise the system 26.
  • the top or deck keyway 47 comprises a pair of laterally spaced support stools or pedestals dill fastened adjacent the underside of the deck 49.
  • Each inner surface of the support stools lltl at its bottom end is provided with a lateral bearing block 50 having an outer bearing con tact surface 5ll, similar to the lateral bearing blocks 32 and 38.
  • the stools 45 are secured to the underside of the deck 49 by means of metal support brackets 52 in a manner similar to that for the lower bearing and support members.
  • the bearing blocks 50 define elongated channels or keyways 53.
  • the keyways 53 may be located in alternate bays (see FIG. 3) formed between the downward extending transverse deck girders 54 so as to facilitate insertion and removal of the keys d2 therefrom. This is best illustrated in FIG. 3, wherein the key is shown in dotted lines prior to insertion into its keyway.
  • the matching keyway 47 comprising a second pair of support stools 55 which are held in spaced relation by means of support brackets 56.
  • a lateral bearing member 57 having a bearing contact surface 58 is secured to the inner surface at the upper end of each of the support stools 55.
  • These members 55 extend longitudinally the length of the stools and define an upper tank keyway 59.
  • a pair of spaced support blocks as, preferably of a wood material, which function in a manner similar to the support blocks 4111.
  • the top tank keyway 59 is constructed to suit the dimension of the key 12 when the tank lltl is cold.
  • the spacing between thelateral bearing blocks 50 is less than the width between the lateral bearing members 57 so that when the key l2 slidably is inserted into register with the keyways 53 and 59 and the tank is cooled, the space between the upper tank bearing members 57 will contract laterally with corresponding contraction of the tank thereby to form a neat fit for the loose key 12.
  • the keys 42 are shorter than the distance between adjacent deck girders 54 so that installation is made easier. It is apparent from the foregoing description that installation of the tanks, deck structure and keyways can be completed before final fitting and inser tion of the keys into their corresponding keyways.
  • both the top and bottom tank keyways may be recessed into the tank structure (that is, the top and bottom tank walls), thereby permitting an increase in the size of the tanks relative to their capacity.
  • a container of large capacity formed of a material characterized by substantial expansion and contraction due to temperature changes and which has a substantially flat bottom, a supporting structure having a relatively flat floor, means for mounting said container within said supporting structure so that said flat bottom is disposed in spaced relation relative to said flat floor and in a manner to substantially stabilize the position of said container within said supporting structure while permitting free expansion and contraction thereof, said mounting means comprising a first and second plurality of longitudinally and transversely arranged elongated keyways provided on said flat bottom of said container and one said "flat floor respectively, corresponding ones of said keyways of said first and second plurality being disposed in vertically aligned matched relation thereby to define a composite channel, an elongated key being slidably received in both of the keyways of each of said composite channels, whereby said container is stabilized against any undesirable movement relative to said supporting structure.
  • bearing means are operably associated with each of said keyways of said first and second plurality whereby said bearing means assists in maintaining said container in a stabilized position.
  • bearing means for each of said keyways comprises a pair of opposing bearing members extending laterally inward of each of said keyways for contact with said key.
  • said container includes a relatively fiat top portion and said supporting structure has a top wall, a third and forth plurality of longitudinally arranged elongated keyways provided on said flat top portion and on said top wall, respectively, corresponding ones of said keyways of said third and fourth plurality being disposed in vertically aligned matched relation.
  • bearing means are operably associated with said third and fourth plurality of said bearing means comprising a pair of opposing bearing members extending laterally inward of each of said keyways disposed for contact with said key.
  • a tank of large capacity formed of a material characterized by substantial expansion and contraction due to temperature changes, said tank having top and bottom walls, said cargo hold having a deck and a floor, means for securing said tank within said cargo hold so that said bottom wall is spaced from said floor, said securing means comprising a first and second plurality of opposing longitudinal and transverse keyways operably secured to said bottom wall and said floor respectively, a third and fourth plurality of opposing longitudinal keyways operably secured to said top and said deck respectively, key means separate from said keyways being slidably and removably disposed in opposing ones of said keyways thereby to stabilize and effectively isolate said tank from any movement transmitted by said tanker.
  • girders extend downward from said deck in a transversely spaced arrangement thereby to define a plurality of bays, said fourth plurality of keyways being secured to said deck in alternate bays between said girders, thereby to facilitate insertion of said key means into its corresponding keyways.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Packages (AREA)
US15040A 1970-02-27 1970-02-27 Securement system using loose keys for independent storage tanks Expired - Lifetime US3612333A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US1504070A 1970-02-27 1970-02-27

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DE (1) DE2101468A1 (de)
ES (1) ES388536A1 (de)
FR (1) FR2083116A5 (de)
GB (1) GB1336502A (de)
NL (1) NL7102157A (de)
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Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3830181A (en) * 1972-06-05 1974-08-20 Conch Int Methane Ltd Stabilization means for tank mounting
US3851607A (en) * 1973-03-29 1974-12-03 Gen Electric Regenerator support system for marine gas turbine
US3875886A (en) * 1972-04-28 1975-04-08 Gen Dynamics Corp Liquified-gas ship
US4660491A (en) * 1983-07-22 1987-04-28 Hitachi Zosen Corporation Double hull ship without reinforcing transverse members between the inner and outer hull platings
US4674430A (en) * 1983-07-11 1987-06-23 Hitachi Zosen Corporation Ship without transverse reinforcing members between the inner and outer hull plating
US5375547A (en) * 1993-04-09 1994-12-27 Ishikawajima-Harima Heavy Industries Co., Ltd. Self-standing liquefied gas storage tank and liquefied gas carrier ship therefor
US5531178A (en) * 1993-05-27 1996-07-02 Ishikawajima-Harima Heavy Industries Co., Ltd. Support structure for self-standing storage tank in liquified gas carrier ship
US6626319B2 (en) 2001-06-04 2003-09-30 Electric Boat Corporation Integrated tank erection and support carriage for a semi-membrane LNG tank
WO2006096897A1 (de) * 2005-03-15 2006-09-21 Austrian Aerospace Gmbh Aufhängung für vakuumisolierte tiefkalte baueinheiten
US20070214804A1 (en) * 2006-03-15 2007-09-20 Robert John Hannan Onboard Regasification of LNG
US20070245941A1 (en) * 2004-07-02 2007-10-25 Sandstrom Robert E Lng Sloshing Impact Reduction System
US20100281887A1 (en) * 2007-12-04 2010-11-11 Samsung Heavy Ind. Co., Ltd. Anti-sloshing structure for lng cargo tank
US20130048642A1 (en) * 2009-10-29 2013-02-28 Aker Engineering & Technology As Supports for tanks
RU2658192C2 (ru) * 2013-04-12 2018-06-19 Нобуеси Моримото Судно для спг или снг
US10539361B2 (en) 2012-08-22 2020-01-21 Woodside Energy Technologies Pty Ltd. Modular LNG production facility
US10640999B2 (en) * 2017-07-26 2020-05-05 Steve Cody Earthquake dampening platform for a ground level storage vessel
RU2727768C1 (ru) * 2019-12-18 2020-07-23 Федеральное государственное унитарное предприятие "Крыловский государственный научный центр" Судно для транспортировки сжиженного природного газа и способ его строительства

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50150185A (de) * 1974-05-27 1975-12-02

Citations (6)

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Publication number Priority date Publication date Assignee Title
GB683855A (en) * 1949-12-30 1952-12-03 British Thomson Houston Co Ltd Improvements in and relating to insulating structures
FR1293275A (fr) * 1960-08-03 1962-05-11 Conch Int Methane Ltd Citerne de stockage ou transport de gaz liquéfiés à basse température
US3064612A (en) * 1960-10-20 1962-11-20 Maryland Shipbuilding And Dryd Carrier constructions for bulk fluids
US3071094A (en) * 1959-06-02 1963-01-01 Anciens Chantiers Dubigeon Sa Vessel for transporting liquefied hydrocarbons
US3270700A (en) * 1964-07-13 1966-09-06 Vehoc Corp Shipboard installation of elongated pressure vessels
US3319431A (en) * 1966-05-25 1967-05-16 Exxon Research Engineering Co Double walled cryogenic tank

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB683855A (en) * 1949-12-30 1952-12-03 British Thomson Houston Co Ltd Improvements in and relating to insulating structures
US3071094A (en) * 1959-06-02 1963-01-01 Anciens Chantiers Dubigeon Sa Vessel for transporting liquefied hydrocarbons
FR1293275A (fr) * 1960-08-03 1962-05-11 Conch Int Methane Ltd Citerne de stockage ou transport de gaz liquéfiés à basse température
US3064612A (en) * 1960-10-20 1962-11-20 Maryland Shipbuilding And Dryd Carrier constructions for bulk fluids
US3270700A (en) * 1964-07-13 1966-09-06 Vehoc Corp Shipboard installation of elongated pressure vessels
US3319431A (en) * 1966-05-25 1967-05-16 Exxon Research Engineering Co Double walled cryogenic tank

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3875886A (en) * 1972-04-28 1975-04-08 Gen Dynamics Corp Liquified-gas ship
US3830181A (en) * 1972-06-05 1974-08-20 Conch Int Methane Ltd Stabilization means for tank mounting
US3851607A (en) * 1973-03-29 1974-12-03 Gen Electric Regenerator support system for marine gas turbine
US4674430A (en) * 1983-07-11 1987-06-23 Hitachi Zosen Corporation Ship without transverse reinforcing members between the inner and outer hull plating
US4660491A (en) * 1983-07-22 1987-04-28 Hitachi Zosen Corporation Double hull ship without reinforcing transverse members between the inner and outer hull platings
US5375547A (en) * 1993-04-09 1994-12-27 Ishikawajima-Harima Heavy Industries Co., Ltd. Self-standing liquefied gas storage tank and liquefied gas carrier ship therefor
US5531178A (en) * 1993-05-27 1996-07-02 Ishikawajima-Harima Heavy Industries Co., Ltd. Support structure for self-standing storage tank in liquified gas carrier ship
US6626319B2 (en) 2001-06-04 2003-09-30 Electric Boat Corporation Integrated tank erection and support carriage for a semi-membrane LNG tank
US20070245941A1 (en) * 2004-07-02 2007-10-25 Sandstrom Robert E Lng Sloshing Impact Reduction System
US7469651B2 (en) 2004-07-02 2008-12-30 Exxonmobil Upstream Research Company Lng sloshing impact reduction system
WO2006096897A1 (de) * 2005-03-15 2006-09-21 Austrian Aerospace Gmbh Aufhängung für vakuumisolierte tiefkalte baueinheiten
US20070214804A1 (en) * 2006-03-15 2007-09-20 Robert John Hannan Onboard Regasification of LNG
US20100281887A1 (en) * 2007-12-04 2010-11-11 Samsung Heavy Ind. Co., Ltd. Anti-sloshing structure for lng cargo tank
US8235242B2 (en) * 2007-12-04 2012-08-07 Samsung Heavy Ind. Co., Ltd. Anti-sloshing structure for LNG cargo tank
US20130048642A1 (en) * 2009-10-29 2013-02-28 Aker Engineering & Technology As Supports for tanks
US8708185B2 (en) * 2009-10-29 2014-04-29 Aker Engineering & Technology As Supports for tanks
US10539361B2 (en) 2012-08-22 2020-01-21 Woodside Energy Technologies Pty Ltd. Modular LNG production facility
RU2658192C2 (ru) * 2013-04-12 2018-06-19 Нобуеси Моримото Судно для спг или снг
US10640999B2 (en) * 2017-07-26 2020-05-05 Steve Cody Earthquake dampening platform for a ground level storage vessel
RU2727768C1 (ru) * 2019-12-18 2020-07-23 Федеральное государственное унитарное предприятие "Крыловский государственный научный центр" Судно для транспортировки сжиженного природного газа и способ его строительства

Also Published As

Publication number Publication date
NL7102157A (de) 1971-08-31
DE2101468A1 (de) 1971-09-09
ES388536A1 (es) 1974-03-01
FR2083116A5 (de) 1971-12-10
SE374325B (de) 1975-03-03
NO128881B (de) 1974-01-21
GB1336502A (en) 1973-11-07

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