CN212455974U

CN212455974U - Pipeline cold insulation structure

Info

Publication number: CN212455974U
Application number: CN202020872619.2U
Authority: CN
Inventors: 任智宏
Original assignee: China Petroleum and Chemical Corp; Sinopec Luoyang Petrochemical Engineering Corp; Sinopec Engineering Group Co Ltd
Current assignee: China Petroleum and Chemical Corp; Sinopec Engineering Group Co Ltd; Sinopec Luoyang Guangzhou Engineering Co Ltd
Priority date: 2020-05-22
Filing date: 2020-05-22
Publication date: 2021-02-02
Anticipated expiration: 2030-05-22

Abstract

The utility model discloses a pipeline cold insulation structure, it comprises flexible cold insulation material module. One end of the flexible cold insulation material module is provided with a front boss (4) and a front clamping groove (5), and the other end of the flexible cold insulation material module is provided with a rear boss (6) and a rear clamping groove (7). Along the adjacent flexible cold insulation material modules in the length direction of the pipeline, at the adjacent end parts, the front boss of one flexible cold insulation material module is clamped into the rear clamping groove of the other flexible cold insulation material module, and the rear boss of one flexible cold insulation material module is clamped into the front clamping groove of the other flexible cold insulation material module. And adjacent side surfaces of the flexible cold insulation material modules adjacent to each other in the circumferential direction of the pipeline are attached to each other. Except the main body of the flexible cold insulation material module and the tops of the positions where the front boss and the front clamping groove are located, the other surfaces of the flexible cold insulation material module are provided with pre-coating adhesive layers (2). The utility model discloses mainly used liquefied natural gas's transport pipe says.

Description

Pipeline cold insulation structure

Technical Field

The utility model belongs to the technical field of the pipeline cold insulation, a pipeline cold insulation structure is related to, especially, relate to a pipeline cold insulation structure for on liquefied natural gas transportation pipeline.

Background

With the rapid development of world economy, the energy consumption of each country is increasing, the demand of natural gas as a green energy resource is also rapidly increasing, and the transportation and storage efficiency of natural gas becomes more and more important. Liquid Natural Gas (LNG), which has a density of approximately 600 times that of gaseous natural gas, makes transporting LNG more efficient than gaseous natural gas, and the use of pipelines to transport LNG has become an important way. LNG is transported at low temperature (-162 ℃), and the working environment of the pipeline often reaches 30-40 ℃, so the requirements on the cold insulation effect and cold insulation materials of the LNG transport pipeline are very high. The common foam glass (inorganic heat insulation material) and the common polyisocyanurate or polyurethane (organic heat insulation material) have the defects of large heat conductivity coefficient, complex installation, poor ageing resistance and the like. Therefore, many units develop flexible heat-insulating cold-insulating materials, and by adopting a precise-control micro-foaming technology, foam holes are fine and uniform, the sizes and densities of bubbles in each layer are slightly different, and the internal addition materials are slightly different according to functions. The heat conductivity coefficient is only 1/3 of the hard cold insulation material, the density is 1/5 of the hard cold insulation material, the compressive strength is 1/2 of the hard cold insulation material, and the flame retardant property is stronger.

The advanced flexible thermal insulation and cold insulation material brands used in engineering at present are mainly Aloes in Germany, Duken in America and Kernel-Fulles in Italy. The main flow technologies have a common characteristic that a multi-layer structure is adopted, and special viscose glue is adopted between layers for field construction. However, the cold insulation material and the construction process have two problems: (1) the construction workers are difficult to construct according to the operation specifications, local construction deviation is easy to occur, and the existing problems are difficult to detect in a short period. (2) Along the length direction of the pipeline, the joints of the cold insulation materials are very easy to have dead spots in the long-period running process, and the cold insulation effect cannot be achieved.

Disclosure of Invention

The utility model aims at providing a pipeline cold insulation structure to solve present flexible adiabatic cold insulation material and the local construction deviation scheduling problem appears easily that construction process exists.

In order to solve the above problem, the utility model adopts the following technical scheme: a pipeline cold insulation structure is characterized in that: the flexible cold insulation material module is composed of flexible cold insulation material modules, the cross section of each flexible cold insulation material module is in a fan-shaped shape, one end of each flexible cold insulation material module is provided with a front boss and a front clamping groove, the other end of each flexible cold insulation material module is provided with a rear boss and a rear clamping groove, the flexible cold insulation material modules are adjacent in the length direction of a pipeline, the front bosses of one flexible cold insulation material module are clamped into the rear clamping grooves of the other flexible cold insulation material module at the adjacent end parts, the rear bosses of one flexible cold insulation material module are clamped into the front clamping grooves of the other flexible cold insulation material module, the flexible cold insulation material modules adjacent in the circumferential direction of the pipeline are jointed with the adjacent side surfaces, the flexible cold insulation material modules are the main bodies of the flexible cold insulation material modules except the parts where the front bosses, the front clamping grooves, the rear bosses and the rear clamping grooves are located, and the main bodies of the flexible cold insulation material modules are removed except the tops, and the other surfaces of the flexible cold insulation material modules are provided with pre-coating adhesive layers.

Adopt the utility model discloses, following beneficial effect has: the utility model provides a modular pipeline cold insulation structure confirms the size of flexible cold insulation material module according to the pipe diameter commonly used, prefabricates out at the manufacturing plant in advance. During construction, the flexible cold insulation material module is transported to the site without cutting, the protective film is torn down to be directly bonded with each other and pasted on the pipeline, construction is convenient, time and labor are saved, and construction efficiency can be greatly improved. The construction is easy to be carried out according to the operation specification, and the local construction deviation and various defects are prevented. Preceding boss and back draw-in groove lock, back boss and preceding draw-in groove lock, made things convenient for on-the-spot installation location on the one hand, on the other hand can prevent that bad point, assurance cold insulation effect from appearing in joint department. Adopt the utility model discloses, can not influence construction quality because of various actual factors at scene, low thermal conductivity and high water proof performance are guaranteed effectively to the economy.

The utility model discloses on mainly used liquefied natural gas's the transportation pipeline, also can be used to other cryrogenic inflammable medium's the transportation pipeline.

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments. The drawings and detailed description do not limit the scope of the invention as claimed.

Drawings

Fig. 1 is a sectional view of the flexible cold insulation material module of the pipeline cold insulation structure along the length direction.

Fig. 2 is a top view of the flexible cold insulating material module shown in fig. 1.

Fig. 3 is a sectional view a-a in fig. 1.

In fig. 1 to 3, the same reference numerals denote the same technical features. The reference numerals denote: 1-low temperature heat insulating layer; 2, pre-coating an adhesive layer; 3-protective film; 4-front boss; 5-front clamping groove; 6-rear boss; 7-rear clamping groove; 8-low temperature elastic layer; 9-composite heat insulating layer; 10-metal protective layer.

Detailed Description

The utility model discloses a pipeline cold insulation structure comprises flexible cold insulation material module. Referring to fig. 1, 2 and 3, one end of the flexible cold insulation material module is provided with a front boss 4 and a front clamping groove 5, and the other end is provided with a rear boss 6 and a rear clamping groove 7. Along the adjacent flexible cold insulation material module of pipeline length direction, at adjacent tip, the preceding boss 4 of a flexible cold insulation material module can block in the back draw-in groove 7 of another flexible cold insulation material module, and the back boss 6 of a flexible cold insulation material module can block in the preceding draw-in groove 5 of another flexible cold insulation material module. The adjacent side surfaces of the flexible cold insulation material modules adjacent to each other in the circumferential direction of the pipeline can be jointed.

The flexible cold insulation material module is the main body of the flexible cold insulation material module except for the parts where the front boss 4, the front card slot 5, the rear boss 6 and the rear card slot 7 are located. Except the main body of the flexible cold insulation material module and the tops of the positions where the front boss 4 and the front clamping groove 5 are located, the other surfaces of the flexible cold insulation material module are provided with pre-coating adhesive layers 2, and the surfaces of the pre-coating adhesive layers 2 are coated with protective films 3. The cross section of the flexible cold insulation material module at any position along the length direction of the pipeline is in a sector ring shape.

The utility model discloses a preferred scheme is, the main part of flexible cold insulation material module is equipped with low temperature heat insulation layer 1, low temperature elastic layer 8, compound heat insulation layer 9 and metal protection layer 10 from inside to outside (being from being close to the pipeline to the direction of keeping away from the pipeline promptly). The position that flexible cold insulation material module boss 4 was located in the front is equipped with low temperature elastic layer 8, compound heat insulation layer 9 and metal protection layer 10 from inside to outside, and the position that draw-in groove 5 was located in the front is equipped with compound heat insulation layer 9 and metal protection layer 10 from inside to outside, and the position that back draw-in groove 7 was located is equipped with low temperature heat insulation layer 1, and the position that boss 6 was located in the back is equipped with low temperature heat insulation layer 1 and low temperature elastic layer 8 from inside to outside. When the front boss 4 of a flexible cold insulation material module is clamped into the rear clamping groove 7 of another flexible cold insulation material module and the rear boss 6 of a flexible cold insulation material module is clamped into the front clamping groove 5 of another flexible cold insulation material module, namely, after the front boss 4 is buckled with the rear clamping groove 7 and the rear boss 6 is buckled with the front clamping groove 5, the buckled part is completely provided with the low-temperature heat insulation layer 1, the low-temperature elastic layer 8, the composite heat insulation layer 9 and the metal protection layer 10 from inside to outside. The adjacent layers are connected by gluing. The low temperature mentioned above means a temperature of-196 ℃ to-40 ℃.

The materials of the low-temperature heat insulating layer 1, the low-temperature elastic layer 8 and the composite heat insulating layer 9 are the existing flexible heat insulating and cold insulating materials. By adopting a precise control micro-foaming technology, the foam holes are fine and uniform, and the sizes and the densities of the bubbles of all layers are slightly different. The internal additive material has slightly different functions according to the requirements and has stronger water vapor permeation resistance. The metal protective layer 10 may be an aluminum plate or the like.

The utility model discloses a plurality of flexible cold insulation material modules bond each other and paste on the pipeline, form promptly the utility model discloses a pipeline cold insulation structure. The size of the flexible cold insulation material module is determined according to the commonly used pipe diameter and is prefabricated in a manufacturing factory in advance. During construction, the protective films are torn off from the flexible cold insulation material modules, and then the flexible cold insulation material modules can be directly adhered to each other and are adhered to the pipeline. Along the adjacent flexible cold insulation material modules in the length direction of the pipeline, at the adjacent end parts, the front boss 4 of one flexible cold insulation material module is clamped into the rear clamping groove 7 of the other flexible cold insulation material module, and the rear boss 6 of one flexible cold insulation material module is clamped into the front clamping groove 5 of the other flexible cold insulation material module. The adjacent flexible cold insulation material modules along the circumferential direction of the pipeline are bonded by the pre-coating adhesive layer 2. Other contacting surfaces of adjacent flexible cold insulation material modules are also bonded by the pre-coating adhesive layer 2.

Claims

1. A pipeline cold insulation structure is characterized in that: the flexible cold insulation material module is composed of flexible cold insulation material modules, the cross section of each flexible cold insulation material module is in a fan-shaped shape, one end of each flexible cold insulation material module is provided with a front boss (4) and a front clamping groove (5), the other end of each flexible cold insulation material module is provided with a rear boss (6) and a rear clamping groove (7), the flexible cold insulation material modules are adjacent in the length direction of a pipeline, the front bosses (4) of one flexible cold insulation material module are clamped into the rear clamping grooves (7) of the other flexible cold insulation material module, the rear bosses (6) of the one flexible cold insulation material module are clamped into the front clamping grooves (5) of the other flexible cold insulation material module at the adjacent end parts in the circumferential direction of the pipeline, the adjacent side surfaces are attached, and the flexible cold insulation material modules are main bodies of the flexible cold insulation material modules except for the parts where the front bosses (4), the front clamping grooves (5), the rear bosses (6) and the rear clamping grooves (7) are located, except the main body of the flexible cold insulation material module and the tops of the positions of the front boss (4) and the front clamping groove (5), the other surfaces of the flexible cold insulation material module are provided with pre-coating adhesive layers (2).

2. The pipe cooling structure according to claim 1, wherein: the main part of flexible cold insulation material module is equipped with low temperature heat insulation layer (1) from inside to outside, low temperature elastic layer (8), compound heat insulation layer (9) and metal protection layer (10), the position that flexible cold insulation material module boss (4) located in the front is equipped with low temperature elastic layer (8) from inside to outside, compound heat insulation layer (9) and metal protection layer (10), the position that draw-in groove (5) located in the front is equipped with compound heat insulation layer (9) and metal protection layer (10) from inside to outside, the position that back draw-in groove (7) located is equipped with low temperature heat insulation layer (1), the position that boss (6) located in the back is equipped with low temperature heat insulation layer (1) and low temperature elastic layer (8) from inside to outside.