CN109519703B - Elastic rod supporting device adapting to low-temperature deformation of storage tank - Google Patents
Elastic rod supporting device adapting to low-temperature deformation of storage tank Download PDFInfo
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- CN109519703B CN109519703B CN201811249984.1A CN201811249984A CN109519703B CN 109519703 B CN109519703 B CN 109519703B CN 201811249984 A CN201811249984 A CN 201811249984A CN 109519703 B CN109519703 B CN 109519703B
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- storage tank
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- bent rod
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- 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
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- 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
- F17C2203/015—Bars
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- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
- Pivots And Pivotal Connections (AREA)
Abstract
An elastic rod supporting device adapting to low-temperature deformation of a storage tank comprises a plurality of groups of elastic rod connecting structures (3) which are circumferentially distributed along one end of a low-temperature storage tank (1); one end of the elastic rod connecting structure (3) is connected with the front end of the low-temperature storage tank (3), and the other end of the elastic rod connecting structure is connected with the inner wall of the outer shell (2). The invention is suitable for the fixed connection of the low-temperature propellant storage tank of the space carrier and the fixed connection of various mobile transportation low-temperature volumes and fixed low-temperature storage tanks; the invention avoids the overhigh load and overweight structure of the outer shell and the inner low-temperature storage tank caused by overlarge axial force of the connecting rod. The problem of relative deformation between the low-temperature storage tank and an outer shell or a supporting structure under the condition that the size of the low-temperature storage tank shrinks due to the influence of low temperature after being filled can be solved, and the problems of connection rigidity of the low-temperature storage tank and assembly compensation in engineering application are solved.
Description
Technical Field
The invention relates to an elastic rod supporting device.
Background
In the aspect of fixed connection of industrial and civil low-temperature storage tanks, the mode that a local reinforcing lug structure is adopted for fixedly connecting is common, and the connection mode mainly resists low-temperature deformation by thickening a shell and improving the strength of the shell of the storage tank. This approach is not suitable for cryogenic tanks that use thin shell structures. For the storage tank with thin thickness and light weight, a planar connecting rod structure is commonly adopted at home and abroad, and is further divided into a pressure rod supporting structure and a tension type pull rod structure, and two ends of the connecting rod are generally hinged through a pin shaft and can rotate around the shaft. In the field of aerospace transportation at home and abroad, a connecting rod structure is adopted between a binding stage and a core stage of a low-temperature rocket, and a suspension type connecting rod structure is adopted for a part of rockets, a low-temperature upper stage and an in-orbit aircraft.
In the field of transportation, the scheme that the inner container and the outer shell are integrally filled with fillers is adopted to solve the problem of deformation coordination of the inner storage box, but the requirement on the strength of the integral outer shell is high.
In the prior art, a low-temperature storage tank support generally adopts a straight rod system structure or adopts a connecting structure such as a fixed support rod, a support ring, a support cylinder and the like, does not have the angle compensation capability of a hinge shaft or a spherical hinge, and generates larger concentrated force and additional bending moment on a storage tank connecting point.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the invention provides an elastic rod supporting device suitable for low-temperature deformation of a storage tank, which overcomes the defects of the prior art.
The technical scheme adopted by the invention is as follows: an elastic rod supporting device adapting to low-temperature deformation of a storage tank comprises a plurality of groups of elastic rod connecting structures which are circumferentially distributed along one end of the low-temperature storage tank; one end of the elastic rod connecting structure is connected with the front end of the low-temperature storage tank, and the other end of the elastic rod connecting structure is connected with the inner wall of the outer shell.
Each group of elastic rod connecting structures comprises a spherical hinge assembly, an elastic bent rod and a hinge shaft assembly;
the spherical hinge assembly comprises a ball socket support, a ball head and a fastening ball socket, the bottom surface of the ball socket support is connected to the outer shell, the ball head is in threaded connection with one end of the elastic bent rod, the ball socket support and the fastening ball socket are screwed through threads, and the ball head is installed inside the ball socket support and the fastening ball socket to form a joint bearing;
the hinge shaft assembly comprises a pin shaft, a nut and a hinge support, the hinge support is arranged on the low-temperature storage box, and the other end of the elastic bent rod is arranged on the hinge support through the pin shaft and the nut and rotates around the pin shaft; a gasket and a locking device are arranged between the pin shaft and the support lug of the hinge support;
the middle part of the elastic bent rod is provided with a bending angle, one end of the elastic bent rod is provided with a thread and is used for being in threaded connection with a ball head, and the other end of the elastic bent rod is welded with a hinged joint and is used for being connected with a hinged support.
The elastic bent rod is a tubular piece, and when two ends of the elastic bent rod are pulled or pressed, the bending angle of the elastic bent rod changes, so that the compensation effect is realized.
The material of the ball head, the ball socket support and the fastening ball socket is bearing steel GCr15 or stainless steel 1Cr18Ni9 Ti.
The surface roughness Ra of the opposite grinding surfaces of the ball head, the ball socket support and the fastening ball socket is less than or equal to 0.1 mu m.
The value range of the HRC of the surface hardness of the grinding surface of the ball socket is 38-43, and the value range of the HRC of the surface hardness of the grinding surface of the ball socket support and the fastening ball socket is 33-38.
The clearance between the hinged joint of the elastic bent rod and the hinge support lug is not more than 2 mm; the hinge hole of the elastic bent rod is in clearance fit with the pin shaft, and the maximum clearance is not more than 0.15 mm; the hinge support lug and the pin shaft are in transition fit.
The initial bending angle alpha 0 of the elastic bent rod ranges from 135 degrees to 165 degrees, and the bending angle alpha i is not more than 175 degrees after the bent rod deforms under the condition that the storage box is required to shrink at the maximum low temperature.
The initial included angle beta 0 between the longitudinal axis of the ball head end of the elastic bent rod and the end face of the fastening ball socket is 90 degrees, and the elastic bent rod and the fastening ball socket have no interference under the condition that the ball head rotates 15 degrees in all directions.
The installation method of the elastic rod supporting device adapting to the low-temperature deformation of the storage tank comprises the following steps:
the method comprises the following steps that firstly, a hinge support is installed on a low-temperature storage box, a ball socket support is installed on an outer shell, a fastening ball socket penetrates through an elastic bent rod, and a ball head is screwed and installed on the elastic bent rod through threads;
step two, the low-temperature storage tank is arranged in the outer shell, and the low-temperature storage tank and the outer shell are fixedly connected through a fastening device of a flange or a joint;
step three, an elastic bent rod which is threaded with a fastening ball socket and a ball head is arranged in a ball socket support and is tightly pressed through the fastening ball socket;
rotating the elastic bent rod around the ball head to enable the hinge hole end of the elastic bent rod to be embedded between the support lugs of the hinge support, and enabling the hinge hole in the elastic bent rod to be matched with the hinge hole position of the support lug of the hinge support by adjusting the screwing amount of the fastening ball socket;
and fifthly, the elastic bent rod is hinged with the hinge support through mounting the pin shaft and the nut.
Compared with the prior art, the invention has the advantages that:
(1) the invention is suitable for the fixed connection of the low-temperature propellant storage tank of the space carrier and the fixed connection of various mobile transportation low-temperature volumes and fixed low-temperature storage tanks; the invention avoids the overhigh load and overweight structure of the outer shell and the inner low-temperature storage tank caused by overlarge axial force of the connecting rod. The problem of relative deformation between the low-temperature storage tank and an outer shell or a supporting structure under the condition that the size of the low-temperature storage tank shrinks due to the influence of low temperature after being filled can be solved, and the problems of connection rigidity of the low-temperature storage tank and assembly compensation in engineering application are solved.
(2) The elastic rod connecting structure has deformation compensation capacity, and can realize the change of the distance between two ends of the connecting rod through the relative rotation of the ball socket of the ball head, the relative rotation of the hinged joint and the pin shaft assembly and the bending angle deformation of the elastic rod, thereby realizing the deformation compensation when the storage tank contracts at low temperature and further solving the deformation coordination problem of the connection of the low-temperature storage tank.
(3) The elastic rod connecting structure is a modular component structure, a plurality of groups can be arranged according to the supporting requirements in the connecting section, and the requirements of the product space size and the connecting rigidity can be met through the parameter design of the length, the section and the bending angle of the connecting rod.
(4) The elastic rod connecting structure is in a loose state without bearing when being installed, so that the size coordination and installation of two ends are conveniently realized by rotating the connecting rod, the requirement on product precision is low, and the engineering application is easy.
Drawings
FIG. 1 is a schematic layout of the present invention in connection with an outer shell and a cryogenic tank;
FIG. 2 is a principal constitutional view of the elastic rod coupling structural assembly of the present invention;
FIG. 3 is an assembly view of the ball-end connector of the present invention;
FIG. 4 is a schematic view of the assembly of the articulating joint end of the invention;
FIG. 5 is a schematic view of a bending angle of the elastic rod according to the present invention;
FIG. 6 is a schematic cross-sectional view of two ends of an elastic rod according to the present invention;
FIG. 7 is a schematic view of the initial installation state of the present invention, in which the bending angle of the elastic rod and the included angle between the bending angle and the hinged end surfaces of the two ends are the initial state;
FIG. 8 is a schematic view of the low temperature working condition of the present invention, wherein the bending angle of the elastic rod is increased, and the ball head and the hinged joint rotate.
Detailed Description
The technical scheme of the invention is further explained by combining the attached drawings.
Aiming at the low-temperature storage tank which adopts two or more than two fixed sections and one end of which is fixedly connected by adopting a flange or a joint, a plurality of groups of elastic rod connecting structures 3 are adopted to realize the connection of the low-temperature storage tank 1 and the outer shell 2 or the foundation, the elastic rods 5 are provided with bending angles, and the two ends are connected in a hinged mode, so that the axial and radial deformation compensation of the low-temperature storage tank 1 and the outer shell 2 or the foundation can be realized simultaneously under the condition of low-temperature contraction of the storage tank 1.
As shown in FIG. 1, the elastic rod supporting device adapted to the low-temperature deformation of the storage tank comprises a plurality of groups of elastic rod connecting structures 3 distributed along the circumferential direction of one end of the low-temperature storage tank 1; one end of the elastic rod connecting structure 3 is connected with the front end of the low-temperature storage tank 3, and the other end is connected with the inner wall of the outer shell 2.
The elastic rod connecting structures 3 are arranged in the same cross section of the low-temperature storage tank 1, and the elastic rod connecting structures can be uniformly distributed along the circumferential direction of the low-temperature storage tank and also can be asymmetrically distributed according to the actual situation of an outer shell or a foundation.
As shown in fig. 2, each group of elastic rod connection structures 3 includes a spherical hinge assembly 4, an elastic bent rod 5, and a hinge shaft assembly 6, the elastic bent rod 5 can rotate around the spherical hinge 4 in all directions and also can rotate around a pin shaft 10 of the hinge shaft assembly 6 in a plane, and the ball head 8, the ball socket support 7 and the fastening ball socket 9 can be lubricated by non-powder or self-lubricating materials.
One end of the elastic bent rod 5 is provided with threads for connecting with a ball head 8 of the spherical hinge component 4, and the screwing depth can be adjusted during assembly; the other end is provided with a plane hinged joint for connecting with the hinge shaft assembly 6; the middle part of the elastic bent rod 5 is provided with a bending angle, so that when the connecting action of the two-force rod is exerted, the axial deformation compensation of the low-temperature storage box 1 is realized mainly through the change of the bending angle; the elastic bent rod 5 is designed into a pipe-shaped piece, so that the elastic bent rod has better elasticity and is beneficial to weight reduction.
As shown in fig. 3, the ball joint assembly 4 of the elastic rod connecting structure is composed of a ball socket support 7, a ball head 8 and a fastening ball socket 9, wherein the ball socket support 7 is directly or indirectly arranged on the outer shell 2 or the foundation; the ball socket support 7 and the fastening ball socket 9 are assembled through screwing, and the ball head 8 is arranged inside an assembly body of the ball socket support 7 and the fastening ball socket 9 and provided with a raised head extending out of the fastening ball socket 9 to be connected with the elastic bent rod 5.
The screwing depth of the ball socket support 7 and the fastening ball socket 9 can be adjusted during assembly, and the ball head 8 and the fastening ball socket 9 are concentric under any normal assembly and use working conditions; and in the deepest screwing state, the ball socket support 7, the ball head 8 and the fastening ball socket 9 are concentric. Therefore, the spherical hinge assembly 4 has the function of adjusting the effective length of the connecting structure and the capability of adapting to the manufacturing and assembling errors of parts.
As shown in fig. 4, the hinge shaft assembly 6 is composed of a pin shaft 10, a nut 11, and a hinge support 12, wherein the hinge support 12 is directly or indirectly mounted on the cryogenic storage tank 1; the hinge support 12 is provided with a set of fork-shaped lugs, the distance between the two lugs is slightly larger than the width of the hinge joint of the elastic bent rod 5, so that the elastic bent rod 5 is assembled and has a certain moving space along the axial direction of the pin shaft 10.
The hinged joint 6 of the elastic bent rod 5 is hinged with a support lug of a hinge support 12 through a pin shaft 10, and when the pin shaft 10 and a nut 11 are installed, a gasket and the like can be additionally arranged according to the requirements of size adjustment and loosening.
As shown in fig. 5, the elastic bending rod 5 is a tubular member, and when the two ends are pulled or pressed, the bending angle of the elastic bending rod 5 changes, so as to realize compensation.
The materials of the ball head 8, the ball socket support 7 and the fastening ball socket 9 are bearing steel GCr15 or stainless steel 1Cr18Ni9 Ti.
The surface roughness Ra of the opposite grinding surfaces of the ball head 8, the ball socket support 7 and the fastening ball socket 9 is less than or equal to 0.1 mu m.
The value range of the HRC of the ball head 8 to the grinding surface is 38-43, and the value range of the HRC of the ball socket support 7 and the fastening ball socket 9 to the grinding surface is 33-38.
The clearance between the hinged joint of the elastic bent rod 5 and the support lug of the hinge support 12 is not more than 2 mm; the hinge hole of the elastic bent rod 5 is in clearance fit with the pin shaft 10, and the maximum clearance is not more than 0.15 mm; the hinge support 12 is in transition fit with the pin shaft 10.
As shown in fig. 6, 7 and 8, the initial bending angle α 0 of the elastic bending rod 5 ranges from 135 ° to 165 °, and the bending angle α i is not greater than 175 ° after the deformation of the bending rod 5 under the condition of the maximum low-temperature contraction of the storage tank.
The initial included angle beta 0 between the longitudinal axis of the end of the ball head 8 of the elastic bent rod 5 and the end surface of the fastening ball socket 9 is 90 degrees, and the elastic bent rod and the fastening ball socket 9 have no interference under the condition that the ball head 8 rotates 15 degrees in all directions.
During system assembly, firstly, a hinge support is arranged on the low-temperature storage tank 1, a ball socket support 4 is arranged on the outer shell 2, and an elastic bent rod 5 penetrates through a fastening ball socket 9 and is connected with a ball head 8; one end of the low-temperature storage tank 1 is fixedly connected with the outer shell or the foundation through a fastening device of a flange or a joint; the ball head end of the elastic bent rod 5 is arranged in the ball socket support 7 and is tightly pressed by a fastening ball socket 8; embedding the hinged joint end of the elastic bent rod 5 between lugs of the hinge support 12, and adjusting the screwing amount of the fastening ball socket 9 to enable the hinged hole of the elastic bent rod 5 to be matched with the hinged hole of the hinge support 12; and sixthly, the elastic bent rod 5 is connected with the hinge support 12 through a pin shaft assembly.
During normal-temperature assembly, the low-temperature storage tank 1 and the elastic bent rod 5 are in a normal-temperature initial state, and the bending angle of the elastic bent rod 5, the included angle between the elastic bent rod and the end face of the spherical hinge and the included angle between the elastic bent rod and the plane of the hinge support are in initial alpha 0, beta 0 and gamma 0 states; after the low-temperature liquid is filled, the storage tank contracts at low temperature, and under the condition that one end of the storage tank is fixedly connected, the other end of the storage tank contracts simultaneously along the axial direction and the radial direction. The hinge support 12 of the elastic rod connecting structure is driven by the storage box to also displace along the axial direction and the radial direction, and the resultant displacement is far away from the spherical hinge component. The bending angle of the elastic bent rod is increased, and the distance between the two hinged ends is increased, so that the axial and radial deformation compensation is realized; meanwhile, the elastic bent rod rotates around the pressing ball socket and the pin shaft respectively, so that bending moment generated at the root of the connecting rod is avoided.
The present invention has not been described in detail, partly as is known to the person skilled in the art.
Claims (7)
1. An elastic rod supporting device adapting to low-temperature deformation of a storage tank is characterized by comprising a plurality of groups of elastic rod connecting structures (3) which are distributed along the circumferential direction of one end of a low-temperature storage tank (1); one end of the elastic rod connecting structure (3) is connected with the front end of the low-temperature storage tank (1), and the other end of the elastic rod connecting structure is connected with the inner wall of the outer shell (2);
each group of elastic rod connecting structures (3) comprises a spherical hinge assembly (4), an elastic bent rod (5) and a hinge shaft assembly (6);
the spherical hinge assembly (4) comprises a ball socket support (7), a ball head (8) and a fastening ball socket (9), the bottom surface of the ball socket support (7) is connected to the outer shell (2), the ball head (8) is in threaded connection with one end of the elastic bent rod (5), the ball socket support (7) and the fastening ball socket (9) are screwed through threads, and the ball head (8) is installed inside to form a joint bearing;
the hinge shaft assembly (6) comprises a pin shaft (10), a nut (11) and a hinge support (12), the hinge support (12) is installed on the low-temperature storage box (1), and the other end of the elastic bent rod (5) is installed on the hinge support (12) through the pin shaft (10) and the nut (11) and rotates around the pin shaft (10); a gasket and a locking device are arranged between the pin shaft (10) and the support lug of the hinge support (12);
a bending angle is arranged in the middle of the elastic bent rod (5), a thread is arranged at one end of the elastic bent rod and is used for being in threaded connection with the ball head (8), and a hinged joint is welded at the other end of the elastic bent rod and is used for being connected with the hinge support (12);
the initial bending angle alpha 0 of the elastic bent rod (5) ranges from 135 degrees to 165 degrees, and the bending angle alpha i is not more than 175 degrees after the bent rod (5) deforms under the condition that the storage box is required to shrink at the maximum low temperature;
the initial included angle beta 0 between the longitudinal axis of the ball head (8) end of the elastic bent rod (5) and the end face of the fastening ball socket (9) is 90 degrees, and the ball head (8) does not interfere with the fastening ball socket (9) under the condition of rotating at 15 degrees in each direction.
2. The elastic rod supporting device for adapting to the low-temperature deformation of the storage tank, according to claim 1, is characterized in that: the elastic bent rod (5) is a tubular member, and when two ends of the elastic bent rod are pulled or pressed, the bending angle of the elastic bent rod (5) is changed, so that the compensation effect is realized.
3. The elastic rod supporting device for adapting to the low-temperature deformation of the storage tank, according to claim 2, is characterized in that: the ball head (8), the ball socket support (7) and the fastening ball socket (9) are made of bearing steel GCr15 or stainless steel 1Cr18Ni9 Ti.
4. The elastic rod supporting device for adapting to the low-temperature deformation of the storage tank, according to claim 3, is characterized in that: the surface roughness Ra of the opposite grinding surfaces of the ball head (8), the ball socket support (7) and the fastening ball socket (9) is less than or equal to 0.1 mu m.
5. The elastic rod supporting device for adapting to the low-temperature deformation of the storage tank, according to claim 4, is characterized in that: the value range of the HRC of the ball head (8) to the grinding surface is 38-43, and the value range of the HRC of the ball socket support (7) and the fastening ball socket (9) to the grinding surface is 33-38.
6. The elastic rod supporting device for adapting to the low-temperature deformation of the storage tank, according to claim 5, is characterized in that: the clearance between the hinged joint of the elastic bent rod (5) and the support lug of the hinge support (12) is not more than 2 mm; the hinge hole of the elastic bent rod (5) is in clearance fit with the pin shaft (10), and the maximum clearance is not more than 0.15 mm; the support lug of the hinge support (12) is in transition fit with the pin shaft (10).
7. The method for installing the elastic rod supporting device adapting to the low-temperature deformation of the storage tank according to any one of claims 1 to 6, which is characterized by comprising the following steps:
step one, mounting a hinge support (12) on a low-temperature storage box (1), mounting a ball socket support (7) on an outer shell (2), penetrating a fastening ball socket (9) on an elastic bent rod (5), and screwing a ball head (8) on the elastic bent rod (5) through threads;
step two, the low-temperature storage tank (1) is arranged in the outer shell (2) and fixedly connected with the outer shell through a fastening device of a flange or a joint;
step three, an elastic bent rod (5) which is threaded with a fastening ball socket (9) and provided with a ball head (8) is arranged in a ball socket support (7) and is pressed tightly through the fastening ball socket (9);
fourthly, rotating the elastic bent rod (5) around the ball head (8) to enable the hinged end of the elastic bent rod (5) to be embedded between the support lugs of the hinge support (12), and enabling the hinged hole in the elastic bent rod (5) to be matched with the hinged hole position of the support lug of the hinge support (12) by adjusting the screwing amount of the fastening ball socket (9);
and fifthly, the elastic bent rod (5) is hinged with the hinge support (12) by mounting the pin shaft (10) and the nut (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811249984.1A CN109519703B (en) | 2018-10-25 | 2018-10-25 | Elastic rod supporting device adapting to low-temperature deformation of storage tank |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811249984.1A CN109519703B (en) | 2018-10-25 | 2018-10-25 | Elastic rod supporting device adapting to low-temperature deformation of storage tank |
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| CN109519703A CN109519703A (en) | 2019-03-26 |
| CN109519703B true CN109519703B (en) | 2021-04-13 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112977882A (en) * | 2021-03-12 | 2021-06-18 | 上海卫星工程研究所 | High orbit satellite platform structure with central force bearing cylinder type storage boxes tiled in parallel |
| EP4112993A1 (en) * | 2021-06-30 | 2023-01-04 | Airbus Operations GmbH | Mount for double-walled vessel, vessel comprising a mount and vehicle comprising a vessel |
| CN115479207B (en) * | 2022-10-18 | 2024-05-14 | 南通中集能源装备有限公司 | Low-temperature storage tank |
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| CN107855745A (en) * | 2017-10-24 | 2018-03-30 | 北京航空航天大学 | A kind of suspension type aero-engine principal unit centered assembling mechanical system |
| CN207176429U (en) * | 2017-09-22 | 2018-04-03 | 孙献忠 | A kind of municipal road road expansion crack structure |
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2018
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB794835A (en) * | 1955-07-07 | 1958-05-14 | British Oxygen Co Ltd | Improvements in or relating to apparatus for the storage of liquefied gases of low boiling point |
| CN202613038U (en) * | 2012-04-27 | 2012-12-19 | 宝鸡石油机械有限责任公司 | Telescopic compensation supporting structure in interlayer of low-temperature storage tank |
| KR20150056920A (en) * | 2013-11-18 | 2015-05-28 | 에스티엑스조선해양 주식회사 | Support structure for independent storage tank |
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| CN109519703A (en) | 2019-03-26 |
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