JP3990967B2 - Thermal insulation method for walls such as low temperature tanks - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is a low temperature in which a heat insulating layer made of hard urethane foam (hereinafter also referred to simply as hard urethane) is formed on the wall surface of a low temperature tank such as liquefied natural gas (LNG) or liquefied petroleum gas (LPG) by field construction. The present invention relates to a heat insulation construction method for a wall surface of a tank or the like.
[0002]
[Prior art]
When forming a thermal insulation layer of hard urethane on the wall of a low-temperature tank, etc., glass is applied to the surface of the hard urethane in order to prevent the occurrence of harmful cracks due to thermal shock and temperature stress caused by temperature gradients and to prevent the development of such cracks. Generally, a means for forming a heat insulating layer in which a surface material such as a fiber woven fabric is pasted and the both are integrated is employed.
[0003]
As a method of constructing a heat insulating layer in which such hard urethane and a surface material are integrated, the present applicants form a urethane injection space corresponding to the finished thickness of a predetermined heat insulating layer between the wall surfaces. Synchronously with the upward movement of the holding face plate on the construction machine side that can be moved up and down along the wall surface, the surface material is sequentially delivered to the surface side of the space, and the urethane stock solution is applied to the space between the surface material and the wall surface that has been delivered. We have already proposed a method of heat-insulating the entire wall surface by injecting and foaming to form a unit width heat insulation layer in which hard urethane and surface material are integrated, and repeating the construction of this unit width heat insulation layer multiple times (For example, refer to Patent Document 1).
[0004]
[Patent Document 1]
Japanese Patent Laid-Open No. 2001-173894
By the way, in the heat insulation construction method as described above, in order to arrange the end shape of the heat insulation layer to be constructed for each unit width and to surely form a smooth and continuous heat insulation layer over the entire wall surface. It is a very important technical matter to prevent the leakage of the urethane stock solution from the open ends of the urethane injection space during the construction of the unit width heat insulating layer. As a means for preventing leakage of the urethane stock solution, which is an important technical matter, in the already proposed technology, as shown in FIG. 7, the unit width formed between the feeding surface material 21 and the wall surface 23 of the low-temperature tank 22 is used. A pre-made spacer 25 having the same thickness and the same heat insulation performance as hard urethane is preliminarily placed on the wall surface 23 corresponding to both ends in the width direction of the urethane injection space 24 for the heat insulation layer construction (before construction of the unit width heat insulation layer by urethane injection). After pasting and construction, the urethane stock solution is injected into the urethane injection space 24 and foamed while the construction machine (not shown) is lifted along the ready-made spacer 25, thereby leaking the urethane stock solution to both sides. Means for preventing by the spacer 25 was taken.
[0006]
[Problems to be solved by the invention]
However, in the case of the already proposed technology for preventing leakage of the urethane stock solution to both sides using the ready-made spacer 25, it is not necessary to prepare, store, carry in, etc. a large number of ready-made spacers 25. Before the heat insulation layer construction work, the process of attaching the spacer 25 in advance to the wall surfaces 23 corresponding to both ends in the width direction of each urethane injection space 24 by hand is necessary, so the number of processes as a whole of the heat insulation construction is large. Therefore, the work period and construction cost are required. In addition, the affixing operation of the spacer 25 is an altitude work, and in order to firmly adhere the spacer 25 to the wall surface 23 by bonding the entire surface, if the base (wall surface 23) is not a smooth surface, A pretreatment or the like for processing to match the shape is necessary, and there is still room for improvement in this respect.
[0007]
The present invention has been made in view of the above situation, and eliminates the need to use a ready-made spacer, or minimizes the total number of processes, shortens construction time, reduces construction costs, and saves labor. The object is to provide a heat insulation construction method for a wall of a low temperature tank or the like.
[0008]
[Means for Solving the Problems]
In order to achieve the above-described object, the heat-insulating method for a wall surface of a low-temperature tank or the like according to claim 1 of the present invention is a urethane injection space corresponding to the finished thickness of a predetermined heat insulating layer between the wall surface of a low-temperature tank or the like. The surface material is sequentially delivered to the surface side of the space in synchronization with the upward movement of the pressing surface plate on the construction machine side that can be moved up and down along the wall surface in the state of forming a urethane stock solution between the surface material and the wall surface. A low-temperature tank that insulates and foams and heat-insulates the entire wall surface by constructing a unit-width insulation layer in which rigid urethane foam and surface material are integrated, and repeating the construction of this unit-width insulation layer multiple times It is a heat insulation construction method for the wall of
One end open part of urethane injection space at the time of construction of unit width heat insulation layer after the second row is attached to the above construction machine side and the surface is released from the leakage prevention guide or construction machine toward the open part It is characterized in that it is closed by a releasable face material that is fed out sequentially, and the other end open portion is injected and foamed by injecting a urethane stock solution in a state of being closed by the side surface of the adjacent hard urethane foam that has been previously constructed .
[0009]
That is, according to claim 1 of the present invention, the method for heat-insulating a wall of a low-temperature tank or the like injects a urethane stock solution into a space between the surface material and the wall surface while paying out the surface material as the construction machine moves up. When constructing a unit width heat insulation layer in which foamed rigid urethane foam and surface material are integrated , one end open part of the urethane injection space at the time of construction of the unit width heat insulation layer in the second row and after is the above construction machine side Closed by a leak-proof guide whose surface has been released from the mold, or a release surface material that is sequentially drawn out from the construction machine toward the opening, and the other end opening is adjacent to the previously constructed rigid urethane foam. by injecting foam urethane stock solution in a closed state by side, making a large number of ready-made spacer, storage, loading, more preliminary joining work step is not required Insulation significantly reduces the overall number of process construction to shortening the construction period, the reduction of construction costs, it is possible to achieve the required reduction and power saving of the aerial. Moreover, even if the automation of construction is promoted and the base (wall surface) is not a smooth surface, the leakage prevention guide or the release surface material is brought into close contact with the wall surface to securely close the opening. It is possible to ensure the prevention of leakage of the urethane stock solution.
[0010]
In addition , it eliminates the use of off-the-shelf spacers and effectively uses the side of the rigid urethane foam that was previously constructed to prevent leakage of the urethane stock solution from the open end of the urethane injection space when constructing the unit-width insulation layers in the second and subsequent rows. It is possible to use it.
[0011]
Also, insulation construction methods of the wall surface of such cryogenic tank according to claim 2 of the present invention, the wall surface in a state of forming a urethane injection space corresponding to the finished thickness of the predetermined heat insulating layer between the walls, such as cold tank Synchronously with the upward travel of the pressing surface plate on the construction machine side that can be moved up and down along the surface, the surface material is sequentially delivered to the surface side of the space, and the urethane stock solution is injected and foamed between the surface material and the wall surface. Heat insulation construction method for walls such as low-temperature tanks, where a unit width heat insulation layer in which rigid urethane foam and surface material are integrated is constructed, and the entire wall surface is insulated by repeating the construction of the unit width heat insulation multiple times Because
Both ends of the urethane injection space corresponding to the odd-numbered rows including the first row are attached to the construction machine side, and the surface is released from the leakage prevention guide or construction machine, which is sequentially fed out toward both open portions. The urethane stock solution is injected and foamed in a state of being closed by a releasable face material, and an odd-numbered unit-width insulation layer is pre-constructed, and then it corresponds to the even-numbered rows between the odd-numbered unit-width insulation layers that were pre-constructed. The urethane stock solution is injected into the urethane injection space and foamed by closing the sides of the hard urethane foam in the odd-numbered unit-width insulation layer with the open ends at both ends of the urethane injection space. The construction is characterized in that a heat insulation layer is formed over the entire wall surface.
[0012]
That is, the heat-insulating method for the wall surface of a low-temperature tank or the like according to claim 2 of the present invention is to prevent leakage of the urethane stock solution from the open portions at both ends of the urethane injection space when constructing the unit width heat insulating layer of the odd-numbered rows. Rather than using off-the-shelf spacers that require an affixing process to the wall surface in advance, a leakage prevention guide that is attached to the construction machine itself and whose surface has been subjected to mold release treatment, or a release that is fed to the open part as the construction machine runs In order to prevent leakage of the urethane stock solution from the open ends of the urethane injection space when constructing even-width unit-width insulation layers, use a mold-type face material. By using the side of the rigid urethane foam in the unit width heat insulation layer of the row, the production, storage, carrying in of many ready-made spacers, and further pasting work steps become unnecessary, And greatly reduce the number of steps the overall thermal construction shortening the construction period, the reduction of construction costs, together it is possible to achieve the required reduction and power saving of the aerial, the leakage out preventing guide attached to the construction machine Or, since it is not necessary to use a releasable face material that is fed to the open part as the construction machine runs, the rigid urethane foam of the odd-numbered unit-width thermal insulation layer and the even-numbered unit-width thermal insulation layer adjacent to the preceding construction There is no running trace of the leakage prevention guide between the side surfaces of the sheet, or there is no releasable face material, and the side surfaces of the adjacent hard urethane foams are closely adhered to each other to achieve a good finish over the entire wall surface. It is possible to form a heat insulating layer.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows a schematic configuration of a construction machine used for carrying out a heat insulation construction method according to claim 1 and claim 2 and an outline of a heat insulation construction situation among the heat insulation construction methods for wall surfaces of a low-temperature tank or the like according to the present invention. A front view and FIG. 2 are side views thereof. This construction machine A includes a gondola 3 that is suspended so as to be movable up and down along a wall surface 2 of a wall body 1 such as a low-temperature tank. The gondola 3 includes a rigid urethane foam (hereinafter referred to as PUF) 4 and A facility 7 for integrally forming a heat insulating layer 6 of unit width in which a surface material 5 covering and reinforcing the surface of the PUF 4 is integrated by foaming of urethane is provided.
[0014]
As shown in FIG. 3, the heat insulation layer integrated equipment 7 equipped in the gondola 3 is pressed against the surface of the unit width heat insulation layer 6 ′ preliminarily constructed by the construction machine A to move the gondola 3 upward. Accordingly, a rectangular pressing face plate 10 capable of forming and holding a urethane injection space 9 corresponding to the finished thickness t of the heat insulating layer 6 to be constructed and moved between the wall surface 2 and the lower part in the gondola 3. A surface material supply device 12 which is disposed and holds the surface material 5 in a roll shape and can be sequentially fed to the surface side of the urethane injection space 9 through the guide roller 11 as the gondola 3 moves upward, The urethane injection head 13 that injects the urethane stock solution between the surface material 5 and the wall surface 2 that is disposed on the top of the surface material feeding device 12 and reciprocates the injection head 13 in the lateral direction. And a traverser 14 for the purpose.
[0015]
Further, on the one end side in the width direction of the gondola 3, the releasable face material 15 wound and held in a roll shape is passed through the sliding guide plate 16 and the urethane injection space when the heat insulating layer 6 having a unit width is applied. A releasable surface material supply device 17 is mounted so as to sequentially feed out the open ends 9a and 9b of the end 9 toward the open end 9a and close the open end 9a.
[0016]
Next, a method for heat-insulating the entire wall surface 2 by sequentially forming the heat insulating layer 6 having a unit width on the wall surface 2 of the wall 1 such as a low-temperature tank using the construction machine A having the above-described configuration will be described.
As shown in FIG. 3, the construction machine A is set so that the presser face plate 10 is in contact with the surface of the unit width heat insulating layer 6 ′ that has been previously constructed.
[0017]
In this state, the gondola 3 of the construction machine A is moved up along the wall surface 2. While forming the urethane injection space 9 corresponding to the finished thickness t of the unit width heat insulating layer 6 scheduled to be constructed between the pressing surface plate 10 and the wall surface 2 by the upward movement of the pressing surface plate 10 accompanying the upward traveling of the gondola 3, On the surface side of the urethane injection space 9, the surface material 5 wound and held in a roll shape by the surface material supply device 12 is sequentially fed through the guide roller 11, and at the same time, the drawn surface material 5 and the wall surface 2. A urethane stock solution is injected into a space 9 between and from a head 13 which is reciprocated in the lateral direction via a traverser 14 and foamed.
[0018]
At this time, the releasable face material 15 is successively drawn out from the releasable face material supply device 17 mounted on the gondola 3 side toward the one end open portion 9a of the urethane injection space 9, and the one end open portion 9a is closed. On the other hand, since the other end open portion 9b is closed at the side surface of the unit width heat insulating layer 6 ′ that has been previously constructed, the urethane stock solution is prevented from leaking out from the injection space 9 to both sides. A unit width heat insulating layer 6 having a predetermined thickness t in which the PUF 4 formed by foaming and the surface material 5 on the surface thereof is integrated is applied.
[0019]
In the construction of the unit width heat insulating layer 6 in the first row, the releasable surface material supply device 17 capable of sequentially feeding the releasable surface material 15 similar to the open portion 9a is attached to the open portion 9b. Alternatively, a prefabricated spacer having the same heat insulation performance may be attached in advance.
[0020]
Moreover, in the said embodiment, the one end opening part 9a of the urethane injection | pouring space 9 was made to close with the releasable face material 15 drawn | fed out sequentially toward this side surface opening part 9a with the ascending run of the construction machine A. However, instead of this, a mechanical leakage prevention guide may be attached to one end of the construction machine A. As this guide, use of a flat plate, a caterpillar, a roller or the like whose surface has been subjected to mold release treatment is conceivable.
[0021]
FIG. 4: is a front view which shows schematic structure of the construction machine used for implementation of the heat insulation construction method of Claim 3 among the heat insulation construction methods of wall surfaces, such as a low-temperature tank which concerns on this invention. In this construction machine A ′, the release surface materials supply devices 17, 17 for sequentially feeding the release surface materials 15, 15 to the both ends open portions 9 a, 9 b of the urethane injection space 9 on both sides in the width direction of the Kondra 3. Is installed. Since the other structure is the same as that of the construction machine A shown in FIG. 1, the same reference numerals are given to the corresponding portions, and the description thereof is omitted.
[0022]
Next, a method for heat-insulating the entire wall surface 2 by sequentially forming a heat insulating layer 6 of unit width on the wall surface 2 of the wall 1 such as a low-temperature tank using the construction machine A ′ having the above configuration will be described. .
[0023]
First, as shown in FIG. 5, the gondola 3 of the construction machine A ′ is lifted in order along the wall surface 2 corresponding to the odd-numbered rows such as the first row, the third row, the fifth row, the seventh row,. The surface material 5 is fed out to the surface side of the urethane injection space 9 formed between the pressing surface plate 10 and the wall surface 2 by the upward movement of the pressing surface plate 10 accompanying the ascending running, and at the same time, the feeding surface material 5 and the wall surface The urethane stock solution is injected into the space 9 between the two and foamed, whereby the odd-numbered unit width heat insulating layers 6A.
[0024]
At the time of prior construction of the odd-numbered unit width heat insulating layers 6A, the release surface material supply devices 17 and 17 mounted on both sides in the width direction of the gondola 3 are directed toward both ends open portions 9a and 9b of the urethane injection space 9. Since the releasable face materials 15 and 15 are sequentially drawn out and the open ends 9a and 9b are closed, leakage from the urethane stock solution into the both sides is prevented and the PUF 4 and the surface material 5 are integrated. The unit width heat insulating layer 6A of predetermined thickness is applied.
[0025]
Then, as shown in FIG. 6, the gondola 3 of the construction machine A ′ is placed in the even-numbered row portion between the odd-numbered unit-width heat insulating layers 6A, which are pre-constructed in the second row, the fourth row, the sixth row,. As in the case of the odd-numbered row, the urethane stock solution is injected and foamed simultaneously with the feeding of the surface material 5, and the even-width unit width heat insulating layers 6B. Subsequent construction.
[0026]
During the subsequent construction of the even-width unit width heat insulating layers 6B ..., the releasable face materials 15 and 15 are not fed out from the releasable face material supply devices 17 and 17 mounted on both sides in the width direction of the gondola 3, or The releasable face material supply devices 17 and 17 are detached from the gondola 3 and adjacent and opposed units among the odd-numbered unit width heat insulating layers 6A... In which the both ends open portions 9a and 9b of the urethane injection space 9 are preliminarily constructed. A unit width of a predetermined thickness in which the PUF 4 and the surface material 5 are integrated by preventing the urethane stock solution from leaking from the urethane injection space 9 to both sides by closing the side surfaces of the PUFs 4 and 4 in the width heat insulating layers 6A and 6A. A heat insulating layer 6B is applied.
[0027]
Thus, the heat insulation layer of the whole wall surface 2 is formed by the connection of the unit width heat insulation layer 6A ... pre-constructed and the unit width heat insulation layer 6B ...
[0028]
【The invention's effect】
As described above, according to claim 1 of the present invention, the urethane stock solution is injected into the space formed between the surface material and the low-temperature tank wall surface that are sequentially drawn out as the construction machine ascends and is foamed to form a hard urethane. When constructing a unit width heat insulation layer in which the surface material and the surface material are integrated , one end open part of the urethane injection space at the time of construction of the unit width heat insulation layer in the second and subsequent rows is attached to the construction machine side and the surface is separated. By closing the mold-processed leakage prevention guide or the releasable face material that is sequentially drawn out from the construction machine toward the opening, and closing the other end opening by the side of the adjacent rigid urethane foam The use of off-the-shelf spacers that need to be pre-applied to the wall is completely unnecessary, or the use can be kept to a minimum. Preparation, storage, loading, and further pre-joining manual work can not needed or significantly reduce the number of steps of the entire insulation construction as minimum, construction period of significant shortening can be reduced and labor saving construction costs. In addition, automation of construction is promoted, and even when the base (wall surface) is not a smooth surface, the leakage prevention guide or release surface material is brought into close contact with the wall surface to reliably prevent leakage of the urethane stock solution. By being able to do it, there exists an effect that a predetermined heat insulation layer can be constructed with sufficient finishing.
[0029]
In addition, according to claim 2 of the present invention, the unit width heat insulation layer of multiple rows is constructed such that the construction of the unit width heat insulation layer of the odd-numbered row portion precedes and then the unit width heat insulation layer of the even row portion is constructed. In order to prevent the urethane stock solution from leaking out during the construction of the unit width heat insulation layer of the odd-numbered row that precedes by dividing the construction procedure into two groups before and after, instead of using a ready-made spacer that requires a pasting process to the wall surface in advance, Use a leakage prevention guide that is attached to the construction machine itself, and the surface is treated to release, or a releasable face material that is fed to the open part as the construction machine runs, and the subsequent even-width unit-width insulation layers In order to prevent the urethane stock solution from leaking out during construction, the side surfaces of the rigid urethane foam in the unit-width heat insulation layer of the odd-numbered row of the preceding construction were used instead of using a ready-made spacer. In the same way as above, many prefabricated spacers are not required to be prepared, stored, carried in, and pre-pasted. Of course, it is not necessary to use the leakage prevention guide attached to the construction machine or the releasable face material that is fed to the open part as the construction machine travels. The running trace of the leakage prevention guide remains between the side surfaces of the hard urethane foam of the odd-numbered unit width heat insulating layer and the even-numbered unit width heat insulating layer adjacent thereto, or there is a releasable surface material. Without effect, the side surfaces of the adjacent hard urethane foams are brought into close contact with each other, and an excellent heat insulation layer can be formed over the entire wall surface.
[Brief description of the drawings]
FIG. 1 is a front view showing a schematic configuration of a construction machine used for carrying out a thermal insulation construction method according to claim 1 and an outline of the thermal insulation construction status among thermal insulation construction methods for a wall surface of a low-temperature tank or the like according to the present invention. .
FIG. 2 is a side view of FIG.
FIG. 3 is a plan view of a main part for explaining a construction situation of unit width heat insulation layers in the second and subsequent rows.
FIG. 4 is a front view showing a schematic configuration of a construction machine used for carrying out the heat-insulating construction method according to claim 2 among the heat-insulating construction methods for wall surfaces of a low-temperature tank or the like according to the present invention.
FIG. 5 is a plan view of a main part for explaining the prior construction situation of odd-numbered unit width heat insulating layers.
FIG. 6 is a plan view of the main part for explaining the subsequent construction status of the unit-width heat insulation layers in even rows.
FIG. 7 is a plan view of a main part for explaining a construction situation of a unit width heat insulating layer according to a previously proposed technique.
[Explanation of symbols]
1 Wall such as low temperature tank 2 Wall surface 3 Gondola 4 Hard urethane foam (PUF)
DESCRIPTION OF SYMBOLS 5 Surface material 6 Unit width heat insulation layer 6 'Unit width heat insulation layer 6' preceded construction 6A Odd-number unit width heat insulation layer 6B Even-number unit width heat insulation layer 9 Urethane injection space 9a, 9b Opening part 10 Pressing face plate 15 Release property Face material A, A 'Construction machine

Claims (2)

The above-mentioned space is synchronized with the upward movement of the pressing surface plate on the construction machine side that can be moved up and down along the wall surface while forming a urethane injection space corresponding to the finished thickness of the predetermined heat insulation layer between the wall surface of a low-temperature tank or the like. The surface material is fed out sequentially on the surface side of the material, a urethane stock solution is injected between the drawn surface material and the wall surface, and foamed to construct a unit width heat insulating layer in which the rigid urethane foam and the surface material are integrated, It is a heat insulation construction method for the wall surface of a low temperature tank or the like that performs heat insulation construction on the entire wall surface by repeating the construction of the heat insulating layer of this unit width,
One end open part of urethane injection space at the time of construction of unit width heat insulation layer after the second row is attached to the above construction machine side and the surface is released from the leakage prevention guide or construction machine toward the open part It is closed by the releasable face material that is fed out in sequence, and the other end open part is closed by the side of the adjacent hard urethane foam that has been installed adjacently, and the urethane stock solution is injected and foamed. Thermal insulation construction method. The above-mentioned space is synchronized with the upward movement of the pressing surface plate on the construction machine side that can be moved up and down along the wall surface while forming a urethane injection space corresponding to the finished thickness of the predetermined heat insulation layer between the wall surface of a low-temperature tank or the like. The surface material is fed out sequentially on the surface side of the material, a urethane stock solution is injected between the drawn surface material and the wall surface, and foamed to construct a unit width heat insulating layer in which the rigid urethane foam and the surface material are integrated, It is a heat insulation construction method for the wall surface of a low temperature tank or the like that performs heat insulation construction on the entire wall surface by repeating the construction of the heat insulating layer of this unit width,
Both ends of the urethane injection space corresponding to the odd-numbered rows including the first row are attached to the construction machine side, and the surface is released from the leakage prevention guide or construction machine, which is sequentially fed out toward both open portions. The urethane stock solution is injected and foamed in a state of being closed by a releasable face material, and an odd-numbered unit-width insulation layer is pre-constructed, and then it corresponds to the even-numbered rows between the odd-numbered unit-width insulation layers that were pre-constructed. The urethane stock solution is injected into the urethane injection space and foamed by closing the sides of the hard urethane foam in the odd-numbered unit-width insulation layer with the open ends at both ends of the urethane injection space. A heat-insulating method for wall surfaces of low-temperature tanks, etc., characterized by forming a heat insulating layer over the entire wall surface.

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