KR102595209B1 - Cold insulation structure for cryogenic piping with excellent bonding strength and cold insulation construction method for cryogenic piping using the same - Google Patents

Abstract

Provided are a cold reservation structure which can improve cold reservation characteristics for a piping, and cold reservation construction method using the same. The cold reservation structure according to one aspect of the present invention comprises a pair of cold reservation spacers configured to surround the outer surface of the piping and provided with cold reservation material fixing units at both ends. The cold reservation material fixing unit includes a stepped portion which is bent in one direction from the both ends of the cold reservation material fixing unit and is embedded at the interior of the cold reservation material foam-molded on both sides of the cold reservation spacers to fix the cold insulating material to the cold reservation spacer.

Description

A cold insulation structure for cryogenic piping with excellent bonding strength and a cold insulation construction method for cryogenic piping using the same

The present invention relates to a cold insulation structure and a cold insulation construction method using the same. More specifically, it relates to a cold insulation structure that can dramatically improve the cold insulation of pipes and a cold insulation construction method using the same.

In general, ultra-low temperature liquefied gases such as LNG, LPG, and LEG are transported from ships to tanks at storage bases, stored, and then supplied to each consumption area through supply line pipes. At this time, the temperature of the liquefied gas transported through the pipe is extremely low, and if the temperature rises due to the temperature of the outside air during long-distance transportation, the liquefied gas may evaporate inside the pipe and may not be transported properly. In addition, the expansion of internal pressure can cause damage to the piping, resulting in a fatal accident.

Taking this into consideration, cold insulation construction is being implemented in which cold insulation is wrapped around the pipe to block it from external air. The structure of the cold insulation according to the conventional cold insulation construction is primarily attached to the outer circumference of the transfer pipe through which cryogenic liquefied gas is transported. It includes an inner cold insulating layer, an intermediate cold insulating layer and an outer cold insulating layer sequentially coupled to the outside of the inner cold insulating layer, and a jacket layer made of stainless steel or the like is installed on the outside of the outer cold insulating layer. The outside is finished by banding a tape made of stainless steel.

At this time, the inner cold insulation layer, the middle cold insulation layer, and the outer cold insulation layer are all made of polyisocyanurate (hereinafter referred to as 'PIR') foam by processing it into a half-circle or quarter-circle shape. Then, they are integrated and bonded together using sealant.

However, the above-described PIR foam has little change in shrinkage and expansion, and provides excellent cold insulation and resistance to water or moisture, but is very expensive, making it difficult to construct the entire section of cryogenic piping using PIR foam. Excessive construction costs reduce economic feasibility.

In an improved method to solve this problem, a pair of spacer assemblies that simultaneously serve as an insulating material and a formwork are installed spaced apart in the pipe, and then urethane foam is closely injected and expanded into the foam molding space formed between the spacer assemblies. This method provides the effect of insulating ultra-low temperature pipes.

However, this method also causes the problem that the spacer assembly pre-installed in the pipe is pushed by the pressure generated during the foaming and hardening process of the foaming solution, causing a gap between the foamed and hardened urethane foam (cold insulation material) and the space assembly, resulting in a decrease in cold insulation. do.

In addition, since the quality of the molding work of the cold insulator varies significantly depending on the worker's skill level, inspection work is necessary to check whether the foamed and hardened cold insulator has been properly molded. During this check work, the process of removing the corrugated iron installed surrounding the outside of the cold insulator is performed. Not only do cracks occur in the cold insulator, but local damage occurs as the cold insulator is detached along with the corrugated iron, resulting in the problem that the cold insulator cannot be molded properly.

The present invention was devised to solve the above-described problems, and its purpose is to provide a cold insulation structure that can improve cold insulation for pipes and a cold insulation construction method using the same.

However, the technical problems to be solved by the present invention are not limited to the above-mentioned problems, and other problems not mentioned will be clearly understood by those skilled in the art from the description of the invention described below.

The cold insulating structure according to one aspect of the present invention is configured to surround the outer surface of the pipe and includes a pair of cold insulating spacers provided with cold insulating material fixing parts at both ends, and the cold insulating material fixing parts extend in one direction from both ends of the cold insulating material fixing part. By being bent, it includes step portions embedded in the foam-molded cold insulator on both sides of the cold insulating spacer and configured to fix the cold insulating material to the cold insulating spacer.

Preferably, the stepped portion may be configured to be bent outward in the radial direction of the cold insulating spacer from both ends of the cold insulating material fixing part.

Preferably, the pair of cold insulating spacers are configured so that their respective bonding surfaces facing each other are joined to each other, and the step portion is disposed side by side in the axial direction of the bonding surface and the cold insulating spacer to the radial outer side of the cold insulating spacer. It may be configured to be bent.

Preferably, the stepped portion may include at least one cold insulating material injection portion on an outer surface configured to guide the cold insulating material to flow into the stepped portion.

Preferably, the pair of cold insulating spacers are configured so that their respective bonding surfaces facing each other come into contact with each other, and the cold insulating material injection portion may be provided in an area of the step portion facing the bonding surface.

Preferably, the stepped portion may include at least one protrusion protruding from the outer surface.

Preferably, the pair of cold-insulating spacers are configured so that their respective bonding surfaces facing each other come into contact with each other, and the protrusion may be provided in an area of the step portion facing the bonding surface.

Preferably, the pair of cold insulating spacers are configured such that their respective bonding surfaces facing each other are in contact with each other, and the cold insulating material fixing portion further includes a reinforcing portion extending from the step portion in the radial direction of the cold insulating spacer, Reinforcement portions provided in a pair of cold insulating spacers may be configured to overlap each other when viewed in the radial direction of the cold insulating spacer.

Preferably, the cold insulating material fixing portion may further include an inclined portion extending from the step portion in the axial direction of the cold insulating spacer and configured to be inclined with respect to a radial direction of the cold insulating spacer.

Preferably, the pair of cold insulating spacers are configured so that their respective bonding surfaces facing each other come into contact with each other, and the inclined portion may be configured to extend in the axial direction of the cold insulating spacer toward the bonding surface.

The cold insulation construction method using the cold insulation structure according to one aspect of the present invention involves installing a pair of cold insulation spacers by integrally joining them to each other while wrapping the outer surface of the pipe, Steps of installing spaced apart on both sides of the pipe, providing a plurality of cold insulation structures including the pair of cold insulation spacers along the axial direction of the pipe; Installing a molding part to surround the outer surface of a pair of cold insulating spacers of the cold insulating structures to create a cold insulating material molding space in which the cold insulating material is disposed between the spaced apart cold insulating structures; forming the cold insulator by foaming and hardening the foaming solution injected into the cold insulating material molding space; and forming a stepped portion bent in one direction from both ends of the cold insulating material fixing portion provided at both ends of the cold insulating spacer and buried in the cold insulating material. It includes the step of fixing to the cold insulation spacer.

According to an embodiment of the present invention, the connection between the cold insulating spacer and the cold insulating material formed on both sides of the cold insulating spacer can be stably achieved through the bending structure of the cold insulating spacer surrounding the pipe. Accordingly, there is an advantage in that the cold insulation of the pipe can be more reliably secured.

In addition, various other additional effects can be achieved by various embodiments of the present invention. These various effects of the present invention will be described in detail in each embodiment, or descriptions of effects that can be easily understood by those skilled in the art will be omitted.

The following drawings attached to this specification illustrate preferred embodiments of the present invention, and serve to further understand the technical idea of the present invention together with the detailed description of the invention described later. Therefore, the present invention includes the matters described in such drawings. It should not be interpreted as limited to only .
Figure 1 is a diagram showing a cold insulation structure according to an embodiment of the present invention.
Figure 2 is a diagram showing a state in which the cold insulation structure of Figure 1 is coupled to a pipe.
Figure 3 is a view showing the cold insulation structure of Figure 1 cross-sectioned in the axial direction while coupled to a pipe.
Figure 4 is a diagram showing the foamed and hardened state of the cold insulating material in the state of Figure 3.
Figure 5 is an enlarged view of portion A of Figure 4.
Figure 6 is a diagram showing a cold insulation structure according to a second embodiment of the present invention.
Figure 7 is an enlarged view of portion B of Figure 6.
Figure 8 is a diagram showing a cold insulation structure according to a third embodiment of the present invention.
FIG. 9 is a partially enlarged view of the cold insulation spacer in FIG. 8 in a combined state.
10 and 11 are diagrams showing a cold insulation structure according to a fourth embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. Prior to this, the terms or words used in this specification and claims should not be construed as limited to their usual or dictionary meanings, and the inventor must appropriately use the concept of terms to explain his or her invention in the best way. It must be interpreted as meaning and concept consistent with the technical idea of the present invention based on the principle of definability.

Therefore, the embodiments described in this specification and the configurations shown in the drawings are only one of the most preferred embodiments of the present invention and do not entirely represent the technical idea of the present invention, so at the time of filing the present application, various options that can replace them are available. It should be understood that equivalents and variations may exist.

Figure 1 is a diagram showing a cold insulation structure 10 according to an embodiment of the present invention, Figure 2 is a diagram showing a state in which the cold insulation structure 10 of Figure 1 is coupled to a pipe, and Figure 3 is a diagram showing the cold insulation structure 10 of Figure 1. This is a view showing the structure 10 cross-sectioned in the axial direction while coupled to the pipe P, and FIG. 4 is a view showing the foamed and hardened state of the coolant 300 in the state of FIG. 3.

In an embodiment of the present invention, the It can mean.

Referring to FIGS. 1 to 4 , the cold insulation structure 10 according to an embodiment of the present invention may include a cold insulation spacer 100.

The cold-insulating spacer 100 may be configured to surround the outer surface of the pipe (P). As an example, the cold storage spacer 100 may be configured in a semicircular shape. Additionally, the cold insulating spacer 100 may include PIR foam or PUR foam, which has little change in expansion or contraction and has excellent cold insulating properties and resistance to water or moisture.

Specifically, the cold storage spacer 100 may be provided in a pair and configured to surround the outer surface of the pipe (P). That is, the pair of cold-insulating spacers 100 are configured to surround the outer surface of the pipe P on both sides of the radial direction of the pipe P, respectively, so that they can cover the entire outer surface of the pipe P.

Meanwhile, a foaming solution (not shown) may be applied to the pair of cold-insulating spacers 100 on the joint surfaces 120 and each inner peripheral surface facing each other in the radial direction of the pipe P. At this time, the foaming stock solution can serve as a binder during the foaming and hardening process. By using this foaming solution, the pair of cold-insulating spacers 100 can be integrally joined to each other by having their respective bonding surfaces 120 facing each other come into contact with each other. And, the inner peripheral surface of each pair of refrigerated spacers 100 and the outer surface of the pipe P can be integrally joined by the foaming solution.

In addition, cold insulating material fixing parts 110 may be provided at both ends of the cold insulating spacer 100 (specifically, both ends in the axial direction (Z-axis direction) of the cold insulating spacer 100).

The cold insulator fixing part 110 may include a stepped part 112.

Specifically, the stepped portion 112 is formed by bending in one direction from both ends of the cold insulating material fixing portion 110, so that both sides of the cold insulating spacer 100 (both sides in the axial direction (Z-axis direction) of the cold insulating spacer 100) It may be embedded inside the foam-molded cold insulator 300 (see FIG. 4) and be configured to fix the cold insulator 300 to the cold insulator spacer 100. As an example, the coolant 300 may be urethane foam, but is not limited thereto.

In this way, the pair of cold insulating spacers 100 may be configured to surround the outer surface of the pipe (P), and the cold insulating structure 10 including the pair of cold insulating spacers 100 may extend in the axial direction of the pipe (P). It may be provided in plural pieces along (Z-axis direction).

At this time, in order to create a cold insulating material molding space 310 in which the cold insulating material 300 is disposed between the spaced apart cold insulating structures 10, molding is performed to surround the outer surface of the pair of cold insulating spacers 100 of the cold insulating structures 10. Unit 200 may be installed. As an example, the molding part 200 may include a transparent body that can be seen through to visually confirm that the cold insulator 300 is foamed and hardened in the cold insulator molding space 310 formed on the inside.

In one embodiment, the foam liquid for foam molding the cold insulator 300 may be injected from the outside into the cold insulator molding space 310 through a foam liquid injection hole (not shown) formed on one side of the molding part 200.

After the foaming liquid is completely filled in the cold insulating material molding space 310, the cold insulating material 300 can be foamed and hardened by the foaming liquid. At this time, the stepped portion 112 formed by bending in one direction from both ends of the cold insulator fixing part 110 is buried inside the cold insulator 300 to fix the cold insulator 300 to the cold insulator spacer 100.

According to this embodiment of the present invention, the connection between the cold insulating spacer 100 and the cold insulating material 300 formed on both sides of the cold insulating spacer 100 can be stably achieved through the bent structure of the cold insulating spacer 100 surrounding the pipe (P). You can. Accordingly, there is an advantage in that the cold insulation of the pipe (P) can be more reliably secured.

Referring to FIGS. 1 to 4 , the stepped portion 112 may be configured to be bent from both ends of the cold insulating material fixing portion 110 to the radial outside of the cold insulating spacer 100 .

Specifically, the step portion 112 may be configured to be bent outward from both ends of the cold insulating material fixing portion 110 in the radial direction (Y-axis direction) of the cold insulating spacer 100, as shown in FIGS. 1 and 2 .

Alternatively, although not shown, the stepped portion 112 may be bent from both ends of the cold insulating material fixing portion 110 to the outside of the cold insulating spacer 100 in the radial direction (X-axis direction).

In an embodiment of the present invention, a pair of cold storage spacers 100 may be configured to face each other in the radial direction (X-axis direction) of the pipe P with the pipe P interposed therebetween.

In this structure, when the stepped portion 112 is configured to be bent outward in the radial direction (X-axis direction or Y-axis direction) of the pipe P, the stepped portion 112 is placed inside the foam-molded cold insulator 300. By being buried in the radial direction of the pipe (P), the cold insulator 300 can be more reliably fixed to the radial direction (X-axis direction or Y-axis direction) of the pipe (P).

Accordingly, the coupling between the cold insulating spacer 100 and the cold insulating material 300 can be achieved more stably.

In one embodiment, as shown in FIGS. 1 and 2, the step portion 112 may be configured to be arranged side by side in the axial direction (Z-axis direction) of the joint surface 120 and the cold insulating spacer 100.

That is, the step portion 112 is configured to be bent outward in the radial direction (Y-axis direction) of the cold insulating spacer 100 so as to be arranged side by side in the axial direction (Z-axis direction) of the joint surface 120 and the cold insulating spacer 100. It can be.

In this way, the step portion 112 is configured to be bent outward in the radial direction (Y-axis direction) of the cold insulating spacer 100 so that the joint surface 120 and the cold insulating spacer 100 are arranged side by side in the axial direction (Z-axis direction). Therefore, the connection to the pipe P in the inner peripheral area of the cold insulating spacer 100 adjacent to the joint surface 120 between the pair of cold insulating spacers 100 can be more stably achieved.

Figure 5 is an enlarged view of portion A of Figure 4.

Referring to FIGS. 1 to 5 , the stepped portion 112 may include at least one coolant injection portion (H).

The cold insulating material injection unit (H) may be provided on the outer surface of the stepped portion 112 and may be configured to guide the cold insulating material 300 to flow into the stepped portion 112. That is, the cold insulator injection portion H may be filled with a portion of the cold insulator 300 that is formed while the foam stock solution foams and hardens.

In this way, a portion of the cold insulating material 300 may be filled inside the step portion 112 configured to be bent outward in the radial direction (X-axis direction or Y-axis direction) of the pipe P, so that the cold insulating spacer 100 and the cold insulating material (300) The bond between them can be achieved more closely.

In one embodiment, the coolant injection portion H may be provided in an area of the stepped portion 112 facing the joint surface 120.

In this way, a portion of the cold insulating material 300 may be filled inside the area of the step portion 112 facing the joint surface 120, so that the cold insulating spacer 300 is formed in the area adjacent to the joint surface 120 between the pair of cold insulating spacers 100. The bond between (100) and the cold insulating material (300) can be stably achieved. Accordingly, the inner peripheral area of the cold insulating spacer 100 adjacent to the joint surface 120 between the pair of cold insulating spacers 100 can be coupled to the pipe P in a more stable manner.

Hereinafter, a cold insulation construction method using the cold insulation structure 10 according to an embodiment of the present invention will be briefly described.

As shown in Figures 1 to 5, first, a pair of cold insulating spacers 100 are installed by integrally joining each other to cover the outer surface of the pipe (P), and are installed spaced apart on both sides of the pipe (P). do.

Next, a plurality of cold insulation structures 10 including a pair of cold insulation spacers 100 are provided along the axial direction of the pipe P.

Next, in order to create a cold insulating material molding space 310 in which the cold insulating material 300 is disposed between the spaced apart cold insulating structures 10, molding is performed to surround the outer surface of the pair of cold insulating spacers 100 of the cold insulating structures 10. Install unit 200.

Next, the cold insulator 300 is molded by foaming and curing the foam solution injected into the cold insulator molding space 310.

Next, a stepped portion 112 formed by bending in one direction from both ends of the cold insulating material fixing part 110 provided at both ends of the cold insulating spacer 100 is buried inside the cold insulating material 300 to attach the cold insulating material 300 to the cold insulating spacer ( 100) is fixed.

Figure 6 is a diagram showing the cold insulation structure 12 according to the second embodiment of the present invention, and Figure 7 is an enlarged view of portion B of Figure 6.

Since the cold insulation structure 12 according to the present embodiment is similar to the cold insulation structure 10 according to the previous embodiment, redundant description of components that are substantially the same or similar to the previous embodiment will be omitted, and hereinafter, the previous embodiment will be described. Let's focus on the differences from the example.

Referring to FIGS. 6 and 7 , in the cold insulation structure 12, the stepped portion 112 may include at least one protrusion 112a.

The protrusion 112a may be formed to protrude from the outer surface of the stepped portion 112.

According to this implementation configuration, the protrusion 112a protruding from the step portion 112 configured to be bent outward in the radial direction of the pipe P can be inserted into the inside of the cold insulating material 300, which is formed while the foaming solution is foamed and hardened. , the coupling between the cold insulating spacer 100 and the cold insulating material 300 can be achieved more stably.

In one embodiment, the protrusion 112a may be provided in an area of the stepped portion 112 facing the joint surface 120.

In this way, a protrusion 112a insertable into the cold insulator 300 may be formed to protrude from the area of the step portion 112 facing the joint surface 120, so that the joint surface 120 between the pair of cold insulating spacers 100 may be formed. ) in the area adjacent to the cold insulating spacer (100) and the cold insulating material (300) are stably bonded to each other. You can. Accordingly, the inner peripheral area of the cold insulating spacer 100 adjacent to the joint surface 120 between the pair of cold insulating spacers 100 can be coupled to the pipe P in a more stable manner.

FIG. 8 is a diagram showing the cold insulation structure 14 according to the third embodiment of the present invention, and FIG. 9 is a partially enlarged view of the cold insulation spacer 100 in FIG. 8 in a combined state.

Since the cold insulation structure 14 according to the present embodiment is similar to the cold insulation structure 10 according to the previous embodiment, redundant description of components that are substantially the same or similar to the previous embodiment will be omitted, and hereinafter, the previous embodiment will be described. Let's focus on the differences from the example.

Referring to FIGS. 8 and 9 , in the cold insulating structure 14, the cold insulating material fixing part 110 may include a reinforcing part 114.

The reinforcement portion 114 may be configured to extend from the step portion 112 in the radial direction (X-axis direction) of the cold insulating spacer 100.

At this time, the reinforcement portions 114 provided in the pair of cold insulating spacers 100 may be configured to overlap each other when viewed in the radial direction (Y-axis direction) of the cold insulating spacer 100 (see FIG. 9).

That is, in this embodiment, cold storage is carried out from the stepped portion 112. Since the respective reinforcing parts 114 extending in the radial direction (X-axis direction) of the spacer 100 may overlap each other, the coupling between the pair of cold-insulating spacers 100 can be more stable. In addition, since the coupling between the pair of cold insulating spacers 100 is stably achieved by the overlapping configuration of the reinforcing parts 114, the coupling between the cold insulating spacer 100 and the cold insulating material 300 can also be more stable.

10 and 11 are views showing the cold insulation structure 16 according to the fourth embodiment of the present invention. Here, FIG. 10 is a diagram showing that the inclined portion 116, which will be described later, is configured to extend in the direction opposite to the joint surface 120, and FIG. 11 shows the inclined portion 116 is configured to extend in the direction of the joint surface 120. This is the drawing shown.

Since the cold insulation structure 16 according to the present embodiment is similar to the cold insulation structure 10 according to the previous embodiment, redundant description of components that are substantially the same or similar to the previous embodiment will be omitted, and hereinafter, the previous embodiment will be described. Let's focus on the differences from the example.

Referring to FIGS. 10 and 11 , in the cold insulating structure 16, the cold insulating material fixing part 110 may include an inclined part 116.

The inclined portion 116 extends from the step portion 112 in the axial direction (Z-axis direction) of the cold insulating spacer 100 and is configured to be inclined with respect to the radial direction (Y-axis direction) of the cold insulating spacer 100. It can be.

According to this implementation configuration, when the cold insulating material 300 is molded while the foaming liquid is foamed and hardened, the foaming liquid is applied to the stepped portion 112 through the inclined surface of the inclined portion 116 extending from the stepped portion 112. Since the pressing force caused by the expansion of the cold insulating material 300 due to foaming can be buffered, the coupling between the cold insulating spacer 100 and the cold insulating material 300 can be stably achieved.

Referring to FIG. 10 , in one embodiment, the inclined portion 116 may be configured to extend in a direction opposite to the joining surface 120.

Referring to FIG. 11 , unlike the embodiment of FIG. 10 , the inclined portion 116 may be configured to extend in the axial direction (Z-axis direction) of the cold-insulating spacer 100 toward the joint surface 120.

In this way, when the inclined portion 116 extends in the axial direction of the cold insulating spacer 100 toward the joint surface 120, the foamed stock solution is in the area adjacent to the joint surface 120 between the pair of cold insulating spacers 100. When the cold insulator 300 is molded while foaming and curing, the expansion of the cold insulator 300 due to the foaming of the foam solution applied to the step portion 112 through the inclined surface of the inclined portion 116 extending from the step portion 112 Since the pressing force can be buffered, the coupling between the cold insulating spacer 100 and the cold insulating material 300 can be stably achieved.

Accordingly, the inner peripheral area of the cold insulating spacer 100 adjacent to the joint surface 120 between the pair of cold insulating spacers 100 can be coupled to the pipe P in a more stable manner.

As described above, although the present invention has been described with limited examples and drawings, the present invention is not limited thereto, and the technical idea of the present invention and the following will be understood by those skilled in the art to which the present invention pertains. Of course, various modifications and variations are possible within the scope of equivalence of the patent claims to be described.

Meanwhile, in the present invention, terms indicating directions such as up, down, left, right, front, and back are used, but these terms are only for convenience of explanation and may vary depending on the location of the target object or the location of the observer. It is obvious to those skilled in the art that this can be done.

P: Piping
10, 12, 14, 16: Cold insulation structure
100: Cooling spacer
110: Cooling material fixing part
112: Stepped part
112a: projection
114: reinforcement part
116: inclined portion
H: Cooling material injection part
200: Molding part
300: Cooling material

Claims (10)

It is configured to surround the outer surface of the pipe and includes a pair of cold insulating spacers provided with cold insulating material fixing parts at both ends,
The cold insulator fixing part,
It is formed by bending in one direction from both ends of the cold insulating material fixing part, and is embedded in the cold insulating material foam-molded on both sides of the cold insulating spacer, and includes a step portion configured to fix the cold insulating material to the cold insulating spacer,
The stepped portion,
It includes at least one cold insulating material injection portion on the outer surface configured to guide the cold insulating material to flow into the stepped portion,
The pair of cold insulating spacers,
Each joint surface facing each other is configured to be joined by contact,
The cold insulating material injection part,
A cold insulation structure, characterized in that it is provided in the area of the step portion facing the joint surface. According to clause 1,
The stepped portion,
A cold insulating structure, characterized in that it is bent from both ends of the cold insulating material fixing portion to a radial outer side of the cold insulating spacer. According to clause 2,
The pair of cold insulating spacers,
Each joint surface facing each other is configured to be joined by contact,
The stepped portion,
A cold insulation structure, characterized in that it is bent outward in the radial direction of the cold insulation spacer so that the joint surface and the cold insulation spacer are arranged side by side in the axial direction. delete delete According to clause 1,
The stepped portion,
A cold insulation structure comprising at least one protrusion protruding from the outer surface. According to clause 6,
The pair of cold insulating spacers,
Each joint surface facing each other is configured to be joined by contact,
The protrusions are,
A cold insulation structure, characterized in that it is provided in the area of the step portion facing the joint surface. According to clause 1,
The pair of cold insulating spacers,
Each joint surface facing each other is configured to be joined by contact,
The cold insulator fixing part,
Further comprising a reinforcing part extending from the stepped part in a radial direction of the cold insulating spacer,
The reinforcement portions provided in the pair of cold insulating spacers are:
A cold insulating structure, characterized in that the cold insulating spacers overlap each other when viewed in the radial direction. According to clause 1,
The cold insulator fixing part,
Further comprising an inclined portion extending from the step portion in the axial direction of the cold insulating spacer and configured to be inclined with respect to the radial direction of the cold insulating spacer,
The pair of cold insulating spacers,
Each joint surface facing each other is configured to be joined by contact,
The inclined portion,
A cold insulation structure, characterized in that it is configured to extend in the axial direction of the cold insulation spacer toward the joint surface. In the cold insulation construction method using the cold insulation structure according to any one of claims 1 to 3 and 6 to 9,
Installing a pair of cold-insulating spacers by integrally joining them to cover the outer surface of the pipe, but installing them spaced apart on both sides of the pipe;
providing a plurality of cold insulation structures including the pair of cold insulation spacers along the axial direction of the pipe;
Installing a molding part to surround the outer surface of a pair of cold insulating spacers of the cold insulating structures to create a cold insulating material molding space in which the cold insulating material is disposed between the spaced apart cold insulating structures;
Molding the cold insulator by foaming and hardening the foam solution injected into the cold insulator molding space; and
A cold insulating construction method comprising the step of fixing the cold insulating material to the cold insulating spacer by embedding a stepped portion bent in one direction from both ends of the cold insulating material fixing portion provided at both ends of the cold insulating spacer into the cold insulating material.

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