Search

CN-122014989-A - Heat-insulating sealed storage tank and manufacturing method of heat-insulating module in heat-insulating sealed storage tank

CN122014989ACN 122014989 ACN122014989 ACN 122014989ACN-122014989-A

Abstract

The application relates to a heat-insulating sealed storage tank and a manufacturing method of a heat-insulating module in the heat-insulating sealed storage tank. The proximal end of the insert is provided with a cap peak which is lapped on the surface of the structural reinforcing layer, the side wall is provided with a deformation part, the deformation part can clamp the structural reinforcing layer together with the cap peak through radial expansion deformation, mechanical interlocking is formed between the deformation part and the structural reinforcing layer, and the insert is partially extended to the heat preservation layer under the mechanical interlocking state. The insert is provided with threaded holes for being matched with the fastener to fix the external components such as the corrugated plate, the bridging block and the like. According to the application, mechanical interlocking fixation is realized through radial expansion deformation of the insert, no adhesive is needed, the connection strength is not attenuated in an extremely low temperature environment, and the radial expansion deformation of the insert has good tolerance capability on the size precision of the mounting hole, so that the overall reliability and the construction efficiency of the heat-insulating sealed storage tank enclosure system are remarkably improved.

Inventors

  • WEI YING
  • HE WEI

Assignees

  • 中太能源科技(上海)有限公司

Dates

Publication Date
20260512
Application Date
20260402

Claims (10)

  1. 1. The heat-insulating sealed storage tank comprises a tank body (1), wherein a heat-insulating module (2) is paved on the inner wall (11) of the tank body (1), the heat-insulating module (2) comprises a heat-insulating layer (21) and a structural reinforcing layer (22), and is characterized in that an insert (3) is embedded in the heat-insulating module (2), a cap peak (31) which is supported on the surface of the structural reinforcing layer (22) is arranged at the proximal end of the insert (3), deformation parts (331) are arranged on the side wall, the deformation parts (331) of the insert (3) can clamp the structural reinforcing layer (22) together through radial expansion deformation and form mechanical interlocking with the structural reinforcing layer (22), the insert (3) is partially extended to the heat-insulating layer (21) under the state of forming mechanical interlocking with the structural reinforcing layer (22), and threaded holes are formed in the insert (3) and are used for being matched with fasteners (6) to fix external components.
  2. 2. The heat-insulating sealed storage tank according to claim 1, wherein the insert (3) is in a straight cylindrical shape in an uninstalled state, the cap peak (31) expands in the radial direction, a plurality of deformation grooves (33) are uniformly distributed in the circumferential direction of the side wall, deformation parts (331) are formed on the side wall of the insert (3) between the adjacent deformation grooves (33), notches (3311) are formed on the edges of the deformation parts (331), the notches (3311) guide the insert (3) to expand and deform in the radial direction when an axial force is applied to the outside, the middle part of the deformation parts (331) bulges outwards, and a petal-shaped abutting structure (3312) is formed to clamp the structural reinforcing layer (22) with the cap peak (31).
  3. 3. The thermally insulated sealed tank as claimed in claim 2, characterized in that the side walls of the insert (3) are provided with anti-rotation structures which are embedded in the structural reinforcement layer (22) after radial expansion deformation of the insert (3) to prevent rotation of the insert (3) relative to the thermally insulating module (2).
  4. 4. A heat-insulating sealed storage tank according to claim 3, wherein the anti-rotation structure is a stop part (3313) arranged on the deformation part (331), a partition groove (3314) is formed on the upper edge of the stop part (3313) by the deformation part (331), a deformation groove (3315) is formed on the inner wall of the root part of the stop part (3313), and when the deformation part (331) is extruded and deformed, the stop part (3313) is turned towards the structural reinforcement layer (22) to be embedded into the structural reinforcement layer (22).
  5. 5. The heat-insulating sealed storage tank according to claim 1, wherein the insert (3) comprises a cold-end metal section (35), a heat-insulating bridge-cut-off section (36) and a hot-end metal section (37) in sequence along the axial direction, the heat-insulating bridge-cut-off section (36) is made of heat-insulating material and is fixed with the cold-end metal section (35) and the hot-end metal section (37) respectively through mechanical engagement or adhesion, the cold-end metal section (35) is provided with a radial expansion structure to form mechanical interlocking with the structural reinforcement layer (22), and the hot-end metal section (37) is provided with the threaded hole.
  6. 6. The heat-insulating sealed storage tank according to claim 1, wherein the insert (3) is of a bimetal composite structure and comprises an inner layer (38) and an outer layer (39), the tensile strength of the material of the inner layer (38) is not lower than 400MPa to form the threaded hole, the elongation after fracture of the material of the outer layer (39) is not lower than 30% to generate radial expansion deformation, and the inner layer (38) and the outer layer (39) are fixed through metallurgical bonding or mechanical bonding.
  7. 7. The heat-insulating sealed storage tank according to claim 1, wherein the insert (3) comprises a large end part (32), a deformation part (331) and a small end part (34) in sequence along the axial direction, the inner diameter of the large end part (32) is larger than that of the small end part (34), a first threaded hole (321) is formed in the inner wall of the large end part (32), a second threaded hole (341) is formed in the inner wall of the small end part (34), and the deformation part (331) can clamp the structural reinforcing layer (22) through radial expansion deformation.
  8. 8. The heat-insulating sealed storage tank according to claim 1, wherein a shielding film (4) and a corrugated plate (5) are arranged on the inner surface of the heat-insulating module (2), and the corrugated plate (5) is laid above the shielding film (4) and is fixed on the heat-insulating module (2) through matching of a fastener (6) and a threaded hole of the insert (3).
  9. 9. The thermally insulated sealed tank according to claim 1, characterized in that the outer member further comprises a bridge block (7), the bridge block (7) being connected between two adjacent thermally insulating modules (2) and being fixed by a pressure plate (8) fixed to the insert (3) by means of screws.
  10. 10. A method of manufacturing an insulation module in an insulated sealed storage tank according to any one of claims 1 to 9, comprising the steps of: s1, machining an insert mounting hole (221) at a preset position of the structural reinforcing layer (22); S2, inserting the insert (3) into the mounting hole (221) in an unexpanded straight tubular state; S3, applying axial acting force to the distal end of the insert (3) through an expansion tool, so that the side wall of the insert (3) is extruded to radially expand and deform, and the middle part of the insert bulges outwards to clamp the structural reinforcement layer (22) and mechanically interlocks with the structural reinforcement layer (22); S4, compounding a structural reinforcing layer (22) for completing the installation of the insert (3) with the heat preservation layer (21) to form a heat insulation module (2); s5, paving a shielding film (4) on the inner surface of the heat insulation module (2).

Description

Heat-insulating sealed storage tank and manufacturing method of heat-insulating module in heat-insulating sealed storage tank Technical Field The application relates to the field of liquefied natural gas storage and transportation equipment, in particular to a heat-insulating sealed storage tank and a manufacturing method of a heat-insulating module in the heat-insulating sealed storage tank. Background The film type enclosure system is widely used in liquefied natural gas ships and land storage facilities, and the core structure of the film type enclosure system is an adiabatic module paved on the inner wall of a tank body. The heat insulating module is generally formed by compounding a heat insulating layer and a structural reinforcing layer, wherein the heat insulating layer is generally made of polyurethane foam or pearlitic sand and other low-heat-conductivity materials so as to realize a heat insulating function, and the structural reinforcing layer is generally made of plywood so as to provide necessary mechanical strength and rigidity. The inner surface of the heat insulation module is also provided with a plurality of functional components such as corrugated plates, welding rails, bridging blocks and the like, and the reliable fixing of the components directly relates to the long-term service safety of the enclosure system under the extremely low temperature working condition. In the prior art, the functional components are usually screwed directly into the plywood layer or fixed by gluing. However, the manner of directly screwing the screw into the plywood has the problem of insufficient holding force, the plywood belongs to a layered wooden material, the screw is easy to loosen or even fall off under the repeated heat cycle and vibration load, and especially in the extremely low-temperature environment of liquefied natural gas, the problem is further aggravated by material shrinkage deformation. Although the adhesive fixing mode can provide certain connection strength, the adhesive is easy to embrittle and fail at extremely low temperature, and the adhesive technology has strict requirements on construction environment, long curing time and is not beneficial to efficient construction on site. To solve the above problems, the industry has attempted to pre-embed metal inserts in the insulation modules and fix the external members by engaging threaded holes in the inserts with fasteners. However, the existing insert mounting mode depends on interference pressing or adhesive fixation, the requirement of the interference pressing on the size precision of the mounting hole is extremely high, the insert is loosened or the plywood is cracked due to slight deviation, and the adhesive fixation faces the same risk of low-temperature failure as the above. Therefore, there is a need for an insert fixation scheme that enables reliable mechanical locking in the structural reinforcement of the insulation module, is independent of adhesive, and has good tolerance for installation accuracy, to promote overall reliability and construction efficiency of the insulated sealed storage tank containment system. Disclosure of Invention In order to overcome the defects in the prior art, the application provides the heat-insulating sealed storage tank and the manufacturing method of the heat-insulating module in the heat-insulating sealed storage tank, which can realize that the inserts form mechanical interlocking in the structural reinforcing layer of the heat-insulating module through radial expansion deformation, can obtain reliable anchoring connection without depending on adhesives, and has good tolerance capability on the dimensional precision of the mounting holes. The heat-insulating sealed storage tank comprises a tank body, wherein a heat-insulating module is laid on the inner wall of the tank body, the heat-insulating module comprises a heat-insulating layer and a structural reinforcing layer, an insert is embedded in the heat-insulating module, a hat brim which is lapped on the surface of the structural reinforcing layer is arranged at the proximal end of the insert, a deformation part is arranged on the side wall of the insert, the deformation part of the insert can clamp the structural reinforcing layer together with the hat brim through radial expansion deformation and form mechanical interlocking with the structural reinforcing layer, the insert extends to the heat-insulating layer partially under the mechanical interlocking state with the structural reinforcing layer, and a threaded hole is formed in the insert and is used for being matched with a fastener to fix an external component. By adopting the technical scheme, the insert which can radially expand and deform is buried in the heat insulation module, and the insert and the structural reinforcing layer form mechanical interlocking after expansion, so that the fixing mode that the traditional insert depends on adhesive or interference pressing is funda