CN113154245A - Low-temperature storage tank - Google Patents

Low-temperature storage tank Download PDF

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Publication number
CN113154245A
CN113154245A CN202110361855.7A CN202110361855A CN113154245A CN 113154245 A CN113154245 A CN 113154245A CN 202110361855 A CN202110361855 A CN 202110361855A CN 113154245 A CN113154245 A CN 113154245A
Authority
CN
China
Prior art keywords
fixed
cylindrical support
tank body
support
plate
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.)
Pending
Application number
CN202110361855.7A
Other languages
Chinese (zh)
Inventor
顾刘海
刘东进
许志泉
徐小艳
顾华
孙国洪
李晓晨
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.)
China International Marine Containers Group Co Ltd
Zhangjiagang CIMC Sanctum Cryogenic Equipment Co Ltd
CIMC Enric Investment Holdings Shenzhen Co Ltd
Original Assignee
China International Marine Containers Group Co Ltd
Zhangjiagang CIMC Sanctum Cryogenic Equipment Co Ltd
CIMC Enric Investment Holdings Shenzhen Co 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 China International Marine Containers Group Co Ltd, Zhangjiagang CIMC Sanctum Cryogenic Equipment Co Ltd, CIMC Enric Investment Holdings Shenzhen Co Ltd filed Critical China International Marine Containers Group Co Ltd
Priority to CN202110361855.7A priority Critical patent/CN113154245A/en
Publication of CN113154245A publication Critical patent/CN113154245A/en
Pending legal-status Critical Current

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Classifications

    • 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
    • F17C1/00—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge
    • F17C1/002—Storage in barges or on ships
    • 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
    • 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
    • F17C3/00—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
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/01—Shape
    • F17C2201/0104—Shape cylindrical
    • F17C2201/0109—Shape cylindrical with exteriorly curved end-piece
    • 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
    • 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
    • F17C2270/00—Applications
    • F17C2270/01—Applications for fluid transport or storage
    • F17C2270/0102—Applications for fluid transport or storage on or in the water

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

The invention provides a low-temperature storage tank which comprises an outer tank body, an inner tank body positioned in the outer tank body and a supporting assembly supported between the inner tank body and the outer tank body. The support assembly comprises a movable support assembly and a fixed support assembly which are arranged at two axial ends of the low-temperature storage tank. The movable support assembly includes a plurality of movable supports circumferentially spaced about the cryogenic storage tank. Each movable support member includes a first base plate, a first cover plate, and a first cylindrical support. The first base plate is fixed on the inner tank body; the two surfaces of the first base plate are respectively a plane and an arc surface, and the arc surface is matched with the appearance of the inner tank body and is attached to the outer surface of the inner tank body; the first cover plate is fixed on the outer tank body and is provided with a positioning ring; the first end of the first cylindrical support is fixed in the positioning ring of the first cover plate, and the second end of the first cylindrical support is movably supported on the first base plate; the end face of the second end of the first cylindrical support is planar and parallel to the plane of the first backing plate.

Description

Low-temperature storage tank
Technical Field
The invention relates to the technical field of low-temperature liquefied gas storage and transportation equipment, in particular to a low-temperature storage tank.
Background
Liquefied Natural Gas (LNG) is used as a novel marine fuel and has the advantages of high efficiency and environmental protection. And the development of the marine Liquefied Natural Gas (LNG) storage tank industry is rapidly advanced due to the effectiveness of International Maritime Organization (IMO) sulfur restrictions.
In view of the fact that in the prior art, natural gas filling facilities are not sound, filling processes are complex, and customers want to fill less times to meet long-term operation requirements, Liquefied Natural Gas (LNG) storage tanks continuously break through the volume limit from the original 200 to 390 to 500, and even up to the maximum 685 and even 900 volume double-layer Liquefied Natural Gas (LNG) storage tanks. Meanwhile, large-scale marine vessels are used for ocean transportation, the one-way sailing distance is more and more far, the volume of a required Liquefied Natural Gas (LNG) storage tank tends to be large, and therefore the reliability of the internal and external connection of the Liquefied Natural Gas (LNG) storage tank is particularly important.
The marine LNG fuel tank mainly comprises an outer tank body, an inner tank body positioned in the outer tank body and a support assembly supported between the inner tank body and the outer tank body. The supporting component comprises a fixed supporting component and a movable supporting component, the fixed supporting component can prevent the inner tank body from moving and rolling along the axial direction, and the movable supporting component is a sliding end and allows the inner tank body to slide freely.
At present, a glass fiber reinforced plastic support between an inner tank body and an outer tank body is generally designed into an annular shape, one end of the glass fiber reinforced plastic support is processed into an arc shape to be attached to the surface of the inner tank body, and the other end of the glass fiber reinforced plastic support is processed into a plane to be attached to a gland. Because the shell ring of the inner shell is welded by the rolling plate, the radian of the surface of the shell of the inner shell is often deviated from the theoretical actual radian and is an irregular curved surface, and the glass fiber reinforced plastic support can only be carried out according to the theoretical radian during processing, so that the cambered surface of the glass fiber reinforced plastic can be well attached to the surface of the inner shell through multiple grinding and repairing in the subsequent assembly process, and further the manufacturing process is quite complicated and the consumption period is longer.
Disclosure of Invention
The invention aims to provide a low-temperature storage tank which is simple to manufacture and short in manufacturing period, so as to solve the problems in the prior art.
In order to solve the technical problem, the invention provides a low-temperature storage tank which comprises an outer tank body, an inner tank body positioned in the outer tank body and a support assembly supported between the inner tank body and the outer tank body; the support assembly comprises a movable support assembly and a fixed support assembly which are arranged at two axial ends of the low-temperature storage tank; the movable support assembly comprises a plurality of movable supports circumferentially spaced around the cryogenic storage tank;
each of the movable supports includes:
the first base plate is fixed on the inner tank body; the two surfaces of the first base plate are respectively a plane and an arc surface, and the arc surface is matched with the appearance of the inner tank body and is attached to the outer surface of the inner tank body;
the first cover plate is fixed on the outer tank body and is provided with a positioning ring;
the first end of the first cylindrical support is fixed in the positioning ring of the first cover plate, and the second end of the first cylindrical support is movably supported on the first base plate; the end face of the second end of the first cylindrical support is planar and parallel to the plane of the first backing plate.
In one embodiment, the length of the first mat along the circumferential direction of the inner tank is greater than the outer diameter of the first cylindrical support.
In one embodiment, the fixed support assembly comprises a plurality of fixed supports circumferentially spaced around the cryogenic storage tank;
the fixing support includes:
the second base plate is fixed and attached to the inner tank body; the second base plate is arc-shaped and is matched with the shape of the inner tank body;
the fixed pipe is fixed on the second base plate; the fixed pipe is in surface contact with the second base plate, and arc surfaces matched with each other are arranged between the fixed pipe and the second base plate;
the second cover plate is fixed on the outer tank body and is provided with a limiting ring;
the first end of the second cylindrical support is fixed in the limiting ring of the cover plate, and the second end of the second cylindrical support is connected with the fixed pipe; the end face of the second end of the second cylindrical support is attached to the fixed pipe from plane to plane.
In one embodiment, the fixed pipe is sleeved with the second cylindrical support, and the fixed pipe and the second cylindrical support are connected by simultaneously penetrating through the fixed pipe and the second cylindrical support through a fastener extending along the radial direction of the second cylindrical support.
In one embodiment, the fixing tube includes a fixing ring and a sealing plate disposed at one end of the fixing ring, two opposite surfaces of the sealing plate are respectively a plane and an arc-shaped surface, and the plane of the sealing plate is used for abutting against the second end of the second cylindrical support.
In one embodiment, the fixing ring is sleeved on the outer periphery of the second cylindrical support.
In one embodiment, the sealing plate extends outwardly beyond the retaining ring;
the second cylindrical support sleeve is arranged outside the fixing ring, and the end face of the second end of the second cylindrical support is abutted to the part, exceeding the fixing ring, of the sealing plate.
In one embodiment, the fixing tube and the second pad plate are both made of low-temperature steel.
In one embodiment, the first pad plate is made of low-temperature steel.
According to the technical scheme, the invention has the advantages and positive effects that:
the movable support piece of the low-temperature storage tank comprises a first base plate fixed on the inner tank body, a first cover plate fixed on the outer tank body and a first cylindrical support fixedly connected with the first cover plate, and the first base plate and the first cylindrical support are in surface contact between planes, so that the processing difficulty of the first base plate and the first cylindrical support is reduced, the time for installing the first cylindrical support when the outer tank body is sleeved with the inner tank body in the manufacturing process of the low-temperature storage tank is shortened, and the manufacturing period of the low-temperature storage tank is shortened.
And because the first base plate and the first cylindrical support adopt surface contact between a plane and a plane, the first cylindrical support can slide along the first base plate in parallel, so that the abrasion between the first cylindrical support and the first base plate is reduced, the stress of the inner tank body is ensured, the use safety of the low-temperature storage tank is improved, and the service life of the low-temperature storage tank is prolonged.
Drawings
FIG. 1 is a schematic diagram of the structure of one embodiment of the cryogenic storage tank of the present invention;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
FIG. 3 is an enlarged view of the movable support of FIG. 2;
FIG. 4 is a cross-sectional view B-B of FIG. 1;
fig. 5 is an enlarged view of the fixing supporter in fig. 4.
The reference numerals are explained below: 800. a low-temperature storage tank; 1. an inner tank body; 2. an outer tank body; 3. a movable support; 31. a first backing plate; 32. a first cover plate; 33. a first cylindrical support; 4. a fixed support; 41. a second backing plate; 42. a fixed tube; 421. a fixing ring; 422. closing the plate; 43. a second cover plate; 44. a second cylindrical support; 45. a fastener.
Detailed Description
Exemplary embodiments that embody features and advantages of the invention are described in detail below in the specification. It is to be understood that the invention is capable of other embodiments and that various changes in form and details may be made therein without departing from the scope of the invention and the description and drawings are to be regarded as illustrative in nature and not as restrictive.
For further explanation of the principles and construction of the present invention, reference will now be made in detail to the preferred embodiments of the present invention, which are illustrated in the accompanying drawings.
The invention provides a low-temperature storage tank which is mainly used for storing and transporting low-temperature gas, such as liquefied natural gas. The low-temperature storage tank is particularly suitable for storing and transporting natural gas fuel on ships and is also suitable for storing and transporting natural gas fuel on land.
The cryogenic tank is generally placed in a horizontal tank or a vertical tank, and the axial direction of the cryogenic tank is taken as the longitudinal direction of the cryogenic tank as an example of the horizontal tank.
Referring to fig. 1, the cryogenic storage tank 800 in the present embodiment includes an outer tank 2, an inner tank 1 disposed in the outer tank 2, and a support assembly supported between the inner tank 1 and the outer tank 2.
Wherein, the inner tank body 1 and the outer tank body 2 can refer to the related technology, which is not repeated herein.
In the cryogenic storage tank in the related art, after the inner tank body is filled with the liquid LNG, the inner tank body suffers from low temperature, and thus certain shrinkage exists in both the radial direction and the axial direction of the inner tank body. Taking 685 square marine fuel tank as an example, after the LNG low-temperature medium is injected into the inner tank, the axial contraction reaches 60mm, and the radial contraction is 20mm, so that the glass fiber reinforced plastic support which is originally attached and contacted with the surface of the inner tank body is separated from the inner tank body, a certain gap is generated, and the stress is poor.
The ship running on the sea shakes along with the fluctuation of sea waves all the time, so that the inner tank body of the low-temperature storage tank on the ship moves along with the shaking of LNG in the tank. In the long-term past, the glass fiber reinforced plastics at the supporting position and the surface of the inner tank body are abraded, so that the stress condition of the inner tank body is poor, certain potential safety hazards exist, and the service life of the tank body is shortened. Meanwhile, due to the reduction of the stress area of the glass fiber reinforced plastic, the glass fiber reinforced plastic is subjected to stress overload to cause a fracture accident in severe cases.
The supporting component in the embodiment is simple to manufacture and short in manufacturing period, meanwhile, the use safety of the low-temperature storage tank 800 can be guaranteed, and the service life of the low-temperature storage tank 800 is prolonged.
The support assembly in this embodiment is described in detail below.
The supporting component is used for fixing the inner tank body 1 in the outer tank body 2 so as to support the inner tank body 1. Specifically, the support assembly includes a movable support assembly and a fixed support assembly disposed at both axial ends of the cryogenic tank 800.
With reference to the view direction of fig. 1, the movable support assembly is located at the left end, and the fixed support assembly is located at the right end.
The movable support assembly allows for relative displacement between the inner tank 1 and the outer tank 2. Referring to fig. 2, the movable support assembly includes a plurality of movable supports 3 arranged at intervals around the circumference of the inner tank 1.
Further, a plurality of movable supports 3 are symmetrically arranged.
In this embodiment, the number of the movable supporting members 3 is four, and two of the movable supporting members 3 are located below the horizontal middle axial plane S1, and the other two movable supporting members 3 are located above the horizontal middle axial plane S1. Meanwhile, two of the movable supporting pieces 3 are positioned on the left side of the longitudinal middle axial surface S2 of the inner tank 1, and the other two movable supporting pieces 3 are positioned on the right side of the longitudinal middle axial surface S2 of the inner tank 1.
In other embodiments, the number of the movable supports 3 and the arrangement of the movable supports 3 can be set according to actual requirements.
Referring to fig. 2 and 3, each of the movable supports 3 includes a first pad plate 31, a first cover plate 32, and a first cylindrical support 33.
The first cover plate 32 is fixed on the outer tank 2, and fixed connection between the first cover plate 32 and the outer tank 2 is realized. And the first cover plate 32 is provided with a positioning ring which faces the inner vessel 1.
The first cylindrical support 33 is cylindrical having a first end and a second end. The first end is fixed in the positioning ring. Specifically, the positioning ring is sleeved on the outer periphery of the first cylindrical support 33. The second end extends towards the inner vessel 1, i.e. the axial direction of the first cylindrical support 33 extends in the radial direction of the inner vessel 1.
The end surface of the second end of the first cylindrical support 33 is planar. The planar design is adopted, and the processing difficulty of the end face of the first cylindrical support 33 is reduced.
The first cylindrical support 33 is made of glass fiber reinforced plastic. Further, the material of the first cylindrical support 33 is epoxy resin glass fiber reinforced plastic.
The first mat 31 is plate-shaped and fixed to the inner tank 1. Specifically, the inner surface of the first pad 31 is arc-shaped, and the outer surface is planar. The inside and the outside are the use states of the low-temperature storage tank 800 as reference, and the inside is toward the inner tank body 1 and the outside is toward the outer tank body 2.
The radian of the inner surface of the first backing plate 31 is matched with the shape of the inner tank body 1 and is attached to the periphery of the inner tank body 1, so that the first backing plate 31 is fixedly connected with the inner tank body 1.
The outer surface of the first pad 31 is planar, that is, the outer surface is planar. And the outer surface of the first pad 31 is parallel to the end surface of the second end of the first cylindrical support 33 so that the second cylindrical support 44 can slide along the outer surface of the first pad 31.
Further, the length of the first liner plate 31 along the circumferential direction of the inner tank 1 is greater than the outer diameter of the first cylindrical support 33, ensuring a sufficient length for the inner tank 1 to shrink and slide in the axial direction. Specifically, when the cryogenic tank 800 does not carry cryogenic liquid, that is, when the inner tank 1 does not undergo contraction movement, both ends of the first pad 31 exceed the outer periphery of the first cylindrical support 33.
The first gasket 31 is made of low-temperature steel, such as stainless steel 304, and thus can withstand the low-temperature liquid carried in the inner tank 1.
The movable support member 3 in this embodiment, which uses surface contact between the plane and the plane, not only reduces the processing difficulty of the first cushion plate 31 and the first cylindrical support 33, but also ensures that the plane of the first cylindrical support 33 is attached to the plane of the first cushion plate 31 when the outer tank body 2 is sleeved with the inner tank body 1 in the manufacturing process of the low-temperature storage tank 800, thereby shortening the time for installing the first cylindrical support 33 and accelerating the manufacturing cycle of the low-temperature storage tank 800.
When the inner tank body 2 moves relative to the outer tank body 1, the first cylindrical support 33 and the first cushion plate 31 of the movable support member 3 slide relative to each other from plane to plane, so that abrasion between the first cylindrical support 33 and the first cushion plate 31 is reduced, the stress condition of the inner tank body can be further ensured, and the safety of the low-temperature storage tank 800 is ensured. Thus, the cryogenic tank 800 is particularly suitable for use in the harsh environment of a ship when it is underway at sea.
Further, the length of the first backing plate 31 is greater than the outer diameter of the first cylindrical support 33, so that the inner tank body 1 can be ensured to be contracted and slide in the axial direction in a sufficient length, the potential safety hazard of the low-temperature tank body at the support position is avoided, the safety of the low-temperature storage tank 800 in the storage and transportation process is improved, and the service life of the low-temperature storage tank 800 is prolonged.
The fixed supporting component is fixedly connected with the inner tank body 1 and the outer tank body 2, and the inner tank body 1 is prevented from being injected with low-temperature liquid and then radially contracted to enable a gap to be formed between the inner tank body 1 and the supporting component. Referring to fig. 4, the fixed support assembly includes a plurality of fixed supports 4 arranged at intervals around the circumference of the inner tank 1.
Further, a plurality of fixed supports 4 are symmetrically arranged.
In this embodiment, the number of the fixed supporters 4 is four, and the arrangement manner is the same as that of the movable supporters 3, i.e. two of the fixed supporters 4 are located below the horizontal middle axial plane S1, and the other two fixed supporters 4 are located above the horizontal middle axial plane S1. Meanwhile, two of the fixed stays 4 are located on the left side of the longitudinal middle axial plane S2 of the inner tank 1, and the other two fixed stays 4 are located on the right side of the longitudinal middle axial plane S2 of the inner tank 1.
In other embodiments, the number of the fixing supporters 4 and the arrangement manner of the fixing supporters 4 can be set according to actual requirements.
Referring to fig. 4 and 5, each of the fixing supporters 4 includes a second shim plate 41, a fixing pipe 42, a second cover plate 43, a second cylindrical support 44, and a fastener 45.
The second cover plate 43 is fixed to the outer tank 2, and the second cover plate 43 is fixedly connected to the outer tank 2. And the second cover plate 43 is provided with a stop collar facing the inner tank 1.
The second cylindrical support 44 is cylindrical having a first end and a second end. The first end of the second tubular support 44 is secured within the retaining ring. Specifically, the limiting ring is sleeved on the periphery of the second cylindrical support 44. The second end of the second cylindrical support 44 extends towards the inner tank 1, i.e. the axial direction of the second cylindrical support 44 extends in the radial direction of the inner tank 1.
The end face of the second end of the second cylindrical support 44 is planar. The planar design reduces the difficulty in machining the end face of the second cylindrical support 44.
The second cylindrical support 44 is made of glass fiber reinforced plastic. Further, the material of the first cylindrical support 33 is epoxy resin glass fiber reinforced plastic.
The second pad 41 is fixed on the inner tank 1 to realize the fixed connection between the fixed support 4 and the inner tank 1. The second pad 41 is arc-shaped and is fitted to the outer periphery of the inner tank 1 in conformity with the outer shape of the inner tank 1. And the surface of the second backing plate 41 facing the outer tank 2 is also arc-shaped and is also matched with the shape of the inner tank 1.
The second gasket 41 is made of low-temperature steel, such as stainless steel 304, and thus can withstand the low-temperature liquid carried in the inner tank 1.
The fixing tube 42 is fixed to the second pad plate 41. Specifically, the inner end surface of the fixing tube 42 is arc-shaped and is matched with the arc-shaped surface of the second backing plate 41, so that the fixing tube 42 is attached to the second backing plate 41.
The fixed tube 42 includes a fixed ring 421 and a sealing plate 422 disposed at one end of the fixed ring 421. The sealing plate 422 is disposed at the inner end of the fixing ring 421. The two opposite surfaces of the sealing plate 422 are respectively a plane and an arc surface. The arc surface of the sealing plate 422 is matched with the arc of the second backing plate 41, so that the fixing tube 42 is attached to the second point backing plate.
The outer end surface of the sealing plate 422 is planar. And the outer end face of the sealing plate 422 is parallel to the end face of the second end of the second cylindrical support 44, so that the two planes are attached.
In an exemplary embodiment, the fixing ring 421 is sleeved on the outer circumference of the second cylindrical support 44.
In another exemplary embodiment, the fixing ring 421 is disposed inside the second cylindrical support 44, i.e. the second cylindrical support 44 is sleeved outside the fixing ring 421. At this time, the length of the sealing plate 422 is larger than the outer diameter of the fixing ring 421, that is, the sealing plate 422 is outwardly beyond the outer periphery of the fixing ring 421, and the end surface of the second end of the second cylindrical support 44 is in contact with the portion of the sealing plate 422 beyond the fixing ring 421.
The fixed tube 42 is connected to the second cylindrical support 44 by fasteners 45. Specifically, the fixing ring 421 has a plurality of connection holes formed at intervals in the circumferential direction, and the axis of each connection hole extends in the radial direction of the fixing ring 421. The second cylindrical support 44 is provided with a plurality of mounting holes at intervals in the circumferential direction, the mounting holes correspond to the connecting holes, and the axis of the mounting holes extends in the radial direction of the second cylindrical support 44. The fastening member 45 is inserted into the corresponding coupling hole and mounting hole to achieve the coupling of the fixing tube 42 and the second cylindrical support 44. In this embodiment, the fastening member 45 includes a bolt and a nut.
In the fixing support member 4 in this embodiment, the second cylindrical support 44 and the fixing tube 42 are in surface contact with each other between a plane and a plane, which not only reduces the processing difficulty of the second cylindrical support 44 and the fixing tube 42, but also shortens the time for installing the second cylindrical support 44 when the outer tank body 2 is sleeved with the inner tank body 1 in the manufacturing process of the low-temperature storage tank 800, and accelerates the manufacturing cycle of the low-temperature storage tank 800.
The steps of mounting the support assembly of the cryogenic tank 800 in this embodiment are as follows:
step S1, welding the first pad 31 of the movable support 3 to the sliding end of the inner tank 1, and welding the second pad 41 of the fixed support 4 and the fixed tube 42 to the fixed end of the inner tank 1.
Wherein, for the conventional horizontal ship tank and the medium and small ship tank, an 8-point supporting mode is generally adopted, namely 4 supporting pieces are respectively arranged at the sliding end and the fixed end.
Specifically, during welding, the leveling is performed by a level gauge or a related tool to ensure the flatness of the outer surface of the first backing plate 31 and the outer surface of the fixed tube 42 after the welding of the first backing plate 31 and the fixed tube 42 is completed.
Step S2, the second end of the first cylindrical support 33 is placed on the first pad 31, and the two are adjusted to be completely attached.
Specifically, when the first cylindrical support 33 and the first shim plate 31 do not fit well, the flatness of the first shim plate 31 is further corrected to ensure complete fitting.
Step S3 is to fit the second cylindrical support 44 to the fixed tube 42, and to adjust the second end of the second cylindrical support 44 to completely fit the outer surface of the sealing plate 422.
Specifically, when the fitting of the second cylindrical support 44 and the sealing plate 422 is not good, the flatness of the sealing plate 422 of the fixed tube 42 is further corrected to ensure complete fitting.
Step S4 is to weld the first cover plate 32 and the first cylindrical support 33 and place them in correspondence with the first shim plate 31.
Step S5 is to connect the second cylindrical support 44 and the fixed pipe 42 by the fastening member 45 after the second cylindrical support 44 and the fixed pipe 42 are fitted together, and then to place the second cover plate 43.
And step S6, welding and fixing the first cover plate 32 and the outer tank body 2, and welding and fixing the second cover plate 43 and the outer tank body 2 to finish the installation of the support component.
According to the technical scheme, the invention has the advantages and positive effects that:
the movable support piece of the low-temperature storage tank comprises a first base plate fixed on the inner tank body, a first cover plate fixed on the outer tank body and a first cylindrical support fixedly connected with the first cover plate, and the first base plate and the first cylindrical support are in surface contact between planes, so that the processing difficulty of the first base plate and the first cylindrical support is reduced, the time for installing the first cylindrical support when the outer tank body is sleeved with the inner tank body in the manufacturing process of the low-temperature storage tank is shortened, and the manufacturing period of the low-temperature storage tank is shortened.
And because the first base plate and the first cylindrical support adopt surface contact between a plane and a plane, the first cylindrical support can slide along the first base plate in parallel, so that the abrasion between the first cylindrical support and the first base plate is reduced, the stress of the inner tank body is ensured, the use safety of the low-temperature storage tank is improved, and the service life of the low-temperature storage tank is prolonged.
While the present invention has been described with reference to several exemplary embodiments, it is understood that the terminology used is intended to be in the nature of words of description and illustration, rather than of limitation. As the present invention may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the meets and bounds of the claims, or equivalences of such meets and bounds are therefore intended to be embraced by the appended claims.

Claims (9)

1. A cryogenic storage tank comprising an outer tank, an inner tank located within the outer tank, and a support assembly supported between the inner tank and the outer tank; the device is characterized in that the support component comprises a movable support component and a fixed support component which are arranged at two axial ends of the low-temperature storage tank; the movable support assembly comprises a plurality of movable supports circumferentially spaced around the cryogenic storage tank;
each of the movable supports includes:
the first base plate is fixed on the inner tank body; the two surfaces of the first base plate are respectively a plane and an arc surface, and the arc surface is matched with the appearance of the inner tank body and is attached to the outer surface of the inner tank body;
the first cover plate is fixed on the outer tank body and is provided with a positioning ring;
the first end of the first cylindrical support is fixed in the positioning ring of the first cover plate, and the second end of the first cylindrical support is movably supported on the first base plate; the end face of the second end of the first cylindrical support is planar and parallel to the plane of the first backing plate.
2. The cryogenic storage tank of claim 1 wherein a length of the first caul plate along a circumferential direction of the inner tank body is greater than an outer diameter of the first cylindrical support.
3. The cryogenic tank of claim 1, wherein the fixed support assembly comprises a plurality of fixed supports circumferentially spaced around the cryogenic tank;
the fixing support includes:
the second base plate is fixed and attached to the inner tank body; the second base plate is arc-shaped and is matched with the shape of the inner tank body;
the fixed pipe is fixed on the second base plate; the fixed pipe is in surface contact with the second base plate, and arc surfaces matched with each other are arranged between the fixed pipe and the second base plate;
the second cover plate is fixed on the outer tank body and is provided with a limiting ring;
the first end of the second cylindrical support is fixed in the limiting ring of the cover plate, and the second end of the second cylindrical support is connected with the fixed pipe; the end face of the second end of the second cylindrical support is attached to the fixed pipe from plane to plane.
4. The cryogenic storage tank of claim 3 wherein the stationary pipe is sleeved with the second cylindrical support and connected to the second cylindrical support by a fastener extending radially of the second cylindrical support passing through both the stationary pipe and the second cylindrical support.
5. The cryogenic storage tank of claim 3, wherein the fixed pipe comprises a fixed ring and a sealing plate disposed at one end of the fixed ring, opposite surfaces of the sealing plate are a flat surface and an arc-shaped surface, respectively, and the flat surface of the sealing plate is configured to abut against the second end of the second cylindrical support.
6. The cryogenic storage tank of claim 5, wherein the retaining ring is sleeved around the second cylindrical support.
7. The cryogenic tank of claim 5, wherein the closure plate extends outwardly beyond the retaining ring;
the second cylindrical support sleeve is arranged outside the fixing ring, and the end face of the second end of the second cylindrical support is abutted to the part, exceeding the fixing ring, of the sealing plate.
8. The cryogenic storage tank of claim 3, wherein the fixing pipe and the second backing plate are both made of cryogenic steel.
9. The cryogenic storage tank of claim 1, wherein the first backing plate is made of cryogenic steel.
CN202110361855.7A 2021-04-02 2021-04-02 Low-temperature storage tank Pending CN113154245A (en)

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CN202110361855.7A CN113154245A (en) 2021-04-02 2021-04-02 Low-temperature storage tank

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CN113154245A true CN113154245A (en) 2021-07-23

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113638637A (en) * 2021-10-14 2021-11-12 邳州嘉非食品科技有限公司 Conveniently built cereal storage jar
CN116105061A (en) * 2021-11-09 2023-05-12 张家港中集圣达因低温装备有限公司 Vacuum heat-insulating double-layer spherical tank and limiting device thereof

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113638637A (en) * 2021-10-14 2021-11-12 邳州嘉非食品科技有限公司 Conveniently built cereal storage jar
CN116105061A (en) * 2021-11-09 2023-05-12 张家港中集圣达因低温装备有限公司 Vacuum heat-insulating double-layer spherical tank and limiting device thereof
CN116105061B (en) * 2021-11-09 2024-05-07 张家港中集圣达因低温装备有限公司 Vacuum heat-insulating double-layer spherical tank and limiting device thereof

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