US3927787A - Hatch construction in a low temperature liquid tank - Google Patents

Hatch construction in a low temperature liquid tank Download PDF

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Publication number
US3927787A
US3927787A US47742074A US3927787A US 3927787 A US3927787 A US 3927787A US 47742074 A US47742074 A US 47742074A US 3927787 A US3927787 A US 3927787A
Authority
US
United States
Prior art keywords
hatch
dome
tank
wall
low temperature
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.)
Expired - Lifetime
Application number
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English (en)
Inventor
Kihei Katsuta
Tsutomu Matsumoto
Chiaki Matsuyama
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.)
Mitsubishi Heavy Industries Ltd
Original Assignee
Mitsubishi Heavy Industries Ltd
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.)
Filing date
Publication date
Application filed by Mitsubishi Heavy Industries Ltd filed Critical Mitsubishi Heavy Industries Ltd
Application granted granted Critical
Publication of US3927787A publication Critical patent/US3927787A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B63B25/16—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid closed heat-insulated
    • 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
    • F17C13/004—Details of vessels or of the filling or discharging of vessels for large storage vessels not under pressure
    • 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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S220/00—Receptacles
    • Y10S220/901—Liquified gas content, cryogenic

Definitions

  • ABSTRACT A hatch construction in a low temperature liquid tank having a heat insulating layer inside a tank shell, characterized in that a hatch dome having a cover and inside an inner heat insulating layer is adapted for upward and downward movement slidably through an opening formed in the top wall of said tank shell, said hatch dome being carried by supports on the upper surface of the top wall of the tank shell, and a heat insulating seal means is provided for airtightly coating 21 space between the hatch dome and the peripheral part of said opening.
  • FIG.1 A first figure.
  • Low temperature liquid tanks generally have hatches on the top walls of. the tank adapted to contain gas inlet pipes to inactivate the tank, pipes for low temperature liquid in the tank, spray pipes to pre-cool the inside of the tank, pipesfor carrying the liquid out of tank in emergency wirings for pumps, ladders and the like.
  • Another object of the invention is to provide a hatch construction in the low .temperature liquid tank in which the hatch dome and its peripheral top walls can respectively freely has heat contraction, so that the inside heat insulating layer and hatch dome cover may not be adversely affected.
  • the hatch construction in the low temperature liquid tank according to the invention comprises, for
  • a hatch dome which is enclosed by a cover with an insulating layer lined inside, the hatch dome being inserted and slidably movable through an opening upward and downward in the top wall of the tank shell, wherein the hatch dome is carried by supports on the upper surface of the top wall,
  • the hatch dome carried by supports on the upper surface of the top wall of the tank shell can slide upward and downward through the opening in the top wall of the tank shell and avoids concentration of a stress force in the inner heat insulating layer during expansion or contraction of the hatch dome depending on the variation of temperature, the hatch dome being prevented from irregular deformation or from troubles in keeping airtightness in the dome cover.
  • a heat insulating seal means which preferably is a flexible membrane permitting upward and downward movement of the hatch dome so as to isolate the interior of the tank from atmosphere, and heat insulation of the space is kept up advantageously by the flexible membrane which is filled with a heat insulating material.
  • FIG. 1 is a view in cross section of a hatch construction of a conventional low temperature liquid tank
  • FIG. 2 is a transverse cross section of a ship hull having a low temperature liquid tankprovided with a hatch construction as in a preferred embodiment of the invention
  • FIG. 3 is a cross section of the hatch construction of the tank according to the invention.
  • FIG. 4 is a view illustrating the lower end of a liquid discharge pipe provided in the hatch construction of FIG. 3;
  • FIG. 5 is an enlarged view of a connection between an outlet pipe and a liquid discharge pipe.
  • FIG. 2 -a ship hull is shown in a transverse cross section, which includes a low temperature liquid tank having the hatch construction of the invention.
  • the ship hull is provided with an impermeable layer 3 of alow-temperature resistant material having a heat insulating layer 2 made of foam resin or the like inside the tank shell 1 or the ship hull.
  • On the top wall In of the tank shell 1 is provided a hatch dome 4 and 4'.
  • the tank shell 1 has on left and right sides and also on lower side ballast tanks 5.
  • a low temperature liquid 6 is contained in the tank shell 1 close in contact with the'impermeable layer 3 inside the tank. This low temperature liquid 6 can be discharged outwards through a liquid discharge pipe 8 and hatch dome 4 by means of a submerged pump 7. Power is supplied to pump 7 over wiring 9.
  • a safety valve 10, a low temperature liquid transport pipe 11, nozzle pipes 12 and 13 to cool the tank, and a ladder 14 are all retained by the cover of other hatch 'dome 4'.
  • FIG. 3 illustrates details of a construction in the outer peripheral part of the hatch dome 4.
  • the hatch dome 4 is inserted to slide in an opening of the top wall lain the .tank shell.
  • the hatch dome 4 is carried by a plurality of supports on the upper surface of the top wall la in the tank shell.
  • Each support 15 is at its lower end connected pivotally to an eye 16 secured to the periphery of the opening in the top wall of the tank shell, and the upper end to an eye 17 secured to the outer periphery in the upper part of the hatch dome 4.
  • a cover 20 is airtightly fitted with a fastening bolt 19 to an upper flange 4a of the hatch dome 4, a heat insulating layer 21 being also provided on the inside of the same cover 20.
  • the cover 20 is provided with a liquid discharge pipe 8 passing there through and it is airtightly secured thereto by welding.
  • An outer extension of the pipe 8 is wound with a heat insulating material 22. If necessary the liquid discharge pipe 8 may be formed of a double tube.
  • a flexible membrane 24 of an impermeable material Covering a space 23 airtightly between the hatch dome 4 and the top wall la of the tank shell from upward, there is provided a flexible membrane 24 of an impermeable material.
  • An upper edge 24a of the membrane 24 is rigidly fixed to the outer peripheral surface of the hatch dome 4 and a lower edge 24b is secured to an upper surface of the top wall Ia of the tank shell.
  • the flexible membrane 24 is filled with a heat insulating material 25 inside the membrane.
  • the flexible membrane 24 may be made of stainless steel, rubber, or teflon and the heat insulating material 25 inside the membrane of a. polyurethane foam, rock wool, parlite or like material.
  • FIG. 4 shows a part of the lower end of the liquid discharge pipe 8.
  • the discharge pipe 26 of the submerged pump 7 is connected to a lower end of the liquid discharge pipe 8 being slidably inserted into the pipe 26.
  • a gasket housing 27 at the upper end of the discharge pipe 26 is contained in a gasket housing 27 at the upper end of the discharge pipe 26 a gasket 29 which may be pressed by gasket push 28 to the outer peripheral surface of the liquid discharge pipe 8.
  • the gasket 29 may preferably be made of teflon, tetrafluoropolyethylene copolymer, aluminum or copper of the low temperature resistivity.
  • the submerged pump 7 is fixedly provided on a mounting 30 with the heat insulating material secured to a bottom surface of the tank shell 1.
  • a heat insulating layer 31 provided further on the heat insulating layer 2 inside the tank shell 1 can shelter the lower part of the submerged pump 7.
  • tank shell 1 and its inner heat insulating layer 2, and the hatch dome 4 and its inner heat insulating layer 18, respectively, are independent from each other, it is not possible for each heat insulating layer 2 and 18 to receive a stress force concentrated or any crack caused in them.
  • the airtight coating of the flexible membrane 24 over the space 23 may avoid an evaporated gas to leak or mixing of air into the tank even through the low temperature liquid 6 may be a liquefied gas of a flammable nature. Also, presence of the heat insulating material 25 will keep the flexible membrane 24 to remain approximately in the normal temperature and will avoid the membrane being degraded of resiliency due to the low temperature.
  • the cover for the hatch dome 4 can be fitted easily to the hatch dome 4, because possible deformation of the hatch dome 4 is smaller in the amount and such deformation may not be irregular even when it 4 occurs. Up-and-down movement of the liquid discharge pipe 8 following the heat deformation of the tank shell 1 and hatch dome 4 or elongation and contraction of the discharge pipe 8 from temperature change may not cause any trouble, since the lower end of the liquid discharge pipe 8 is connected slidably to the upper end of the discharge pipe 26 of the pump 7.
  • a hatch construction for a low temperature liquid tank having a tank wall with heat insulation on its interior and a hatch opening through said tank wall comprising a tubular hatch dome extending through the opening and having an outer upper end, supporting means for supporting the hatch dome on said tank connected between said tank wall and said dome at a location on said dome spaced above said tank wall, and heat insulation seal means connected between said tank wall and said hatch dome at a spaced location above said wall and below the connection of said support to said hatch dome and extending around the periphery of said hatch dome and sealing and insulating between said hatch dome and said plate.
  • said insulation sealing means includes a sealing membrane sealed at its one end to said hatch dome and at is opposite end to said tank wall.
  • said supporting means comprises a plurality of individual supporting members connected between said hatch dome and said hatch wall, said hatch dome and said hatch wall having eyelets engageable with respective ends of said supports.
  • a hatch according to claim 4, wherein said support comprises a rigid member pivoted at each end in the respective eyelet.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Ocean & Marine Engineering (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
US47742074 1973-06-22 1974-06-07 Hatch construction in a low temperature liquid tank Expired - Lifetime US3927787A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7055373A JPS5443726B2 (xx) 1973-06-22 1973-06-22

Publications (1)

Publication Number Publication Date
US3927787A true US3927787A (en) 1975-12-23

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ID=13434818

Family Applications (1)

Application Number Title Priority Date Filing Date
US47742074 Expired - Lifetime US3927787A (en) 1973-06-22 1974-06-07 Hatch construction in a low temperature liquid tank

Country Status (13)

Country Link
US (1) US3927787A (xx)
JP (1) JPS5443726B2 (xx)
BE (1) BE816739A (xx)
CA (1) CA1008788A (xx)
DE (1) DE2429829C3 (xx)
DK (1) DK336274A (xx)
ES (1) ES427540A1 (xx)
FR (1) FR2234515B1 (xx)
GB (1) GB1421883A (xx)
IT (1) IT1015277B (xx)
NL (1) NL157704B (xx)
NO (1) NO136551C (xx)
SE (1) SE400358B (xx)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101412488B1 (ko) * 2012-11-08 2014-07-04 삼성중공업 주식회사 액화천연가스 저장탱크의 펌프타워 설치구조 및 이의 제작방법
KR101454616B1 (ko) * 2012-11-02 2014-10-27 삼성중공업 주식회사 액화천연가스 저장탱크의 펌프타워 설치구조
CN104295896A (zh) * 2013-07-16 2015-01-21 中国人民武装警察部队学院 一种低温液体槽罐车紧急堵漏方法
CN106499947A (zh) * 2016-12-02 2017-03-15 中车长江车辆有限公司 一种储罐
CN106523906A (zh) * 2016-12-02 2017-03-22 中车长江车辆有限公司 一种储罐及其12点支撑装置
CN106594511A (zh) * 2016-12-02 2017-04-26 中车长江车辆有限公司 一种储罐及其支撑装置
CN106678542A (zh) * 2016-12-02 2017-05-17 中车长江车辆有限公司 一种固定支撑机构及具有固定支撑机构的储罐
CN106764396A (zh) * 2016-12-02 2017-05-31 中车长江车辆有限公司 一种储罐及其10点支撑装置

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH023596Y2 (xx) * 1981-05-15 1990-01-26
JPS58188227U (ja) * 1982-06-04 1983-12-14 株式会社クボタ トラクタ等における操作レバ−装置
JPS5933531U (ja) * 1982-08-24 1984-03-01 株式会社クボタ 切換操作装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3064612A (en) * 1960-10-20 1962-11-20 Maryland Shipbuilding And Dryd Carrier constructions for bulk fluids
US3304877A (en) * 1965-06-08 1967-02-21 J C Carter Company Submerged motor driven pumping system

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3283734A (en) * 1964-12-28 1966-11-08 Exxon Research Engineering Co Externally insulated hull structure
US3319430A (en) * 1965-01-25 1967-05-16 Exxon Research Engineering Co Liquid supported cryogenic container
US3397662A (en) * 1966-06-28 1968-08-20 Mcmullen John J Hatch arrangement for liquefied gas storage tanks

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3064612A (en) * 1960-10-20 1962-11-20 Maryland Shipbuilding And Dryd Carrier constructions for bulk fluids
US3304877A (en) * 1965-06-08 1967-02-21 J C Carter Company Submerged motor driven pumping system

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101454616B1 (ko) * 2012-11-02 2014-10-27 삼성중공업 주식회사 액화천연가스 저장탱크의 펌프타워 설치구조
KR101412488B1 (ko) * 2012-11-08 2014-07-04 삼성중공업 주식회사 액화천연가스 저장탱크의 펌프타워 설치구조 및 이의 제작방법
CN104295896A (zh) * 2013-07-16 2015-01-21 中国人民武装警察部队学院 一种低温液体槽罐车紧急堵漏方法
CN104295896B (zh) * 2013-07-16 2016-12-28 中国人民武装警察部队学院 一种低温液体槽罐车紧急堵漏方法
CN106499947A (zh) * 2016-12-02 2017-03-15 中车长江车辆有限公司 一种储罐
CN106523906A (zh) * 2016-12-02 2017-03-22 中车长江车辆有限公司 一种储罐及其12点支撑装置
CN106594511A (zh) * 2016-12-02 2017-04-26 中车长江车辆有限公司 一种储罐及其支撑装置
CN106678542A (zh) * 2016-12-02 2017-05-17 中车长江车辆有限公司 一种固定支撑机构及具有固定支撑机构的储罐
CN106764396A (zh) * 2016-12-02 2017-05-31 中车长江车辆有限公司 一种储罐及其10点支撑装置

Also Published As

Publication number Publication date
NO136551B (xx) 1977-06-13
NO742213L (xx) 1975-01-20
NL7408432A (xx) 1974-12-24
DK336274A (xx) 1975-03-17
FR2234515A1 (xx) 1975-01-17
JPS5020318A (xx) 1975-03-04
SE7408104L (xx) 1974-12-23
FR2234515B1 (xx) 1979-07-27
SE400358B (sv) 1978-03-20
NL157704B (nl) 1978-08-15
ES427540A1 (es) 1976-09-16
IT1015277B (it) 1977-05-10
DE2429829C3 (de) 1979-08-16
NO136551C (no) 1977-09-21
BE816739A (fr) 1974-10-16
JPS5443726B2 (xx) 1979-12-21
DE2429829A1 (de) 1975-01-23
CA1008788A (en) 1977-04-19
GB1421883A (en) 1976-01-21
DE2429829B2 (de) 1978-11-23

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