JPH0632296U - Insulated tank type cargo tank heat insulation device for liquefied gas carriers - Google Patents

Abstract

(57) [Summary] [Purpose] To absorb the heat shrinkage of the heat insulation panel attached to the surface of the cargo tank. [Structure] Heat insulation panel 2 stacked on the surface of cargo tank A
When the lower plug 28 is pushed in with the mounting of No. 3, the tip of the bolt 27 is inserted into the hole 29 provided in the front end face of the lower plug to insert the tip of the lower plug into the through hole, and the opposite side of the heat insulating panel. The phase joints having the stretchable parts provided at the edges are overlapped.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a heat insulating device for an independent tank type cargo tank in a liquefied gas (LPG, LEG, LNG, etc.) carrier.

[0002]

[Prior art]

 As shown in FIG. 8, a conventional heat insulating device for a cargo tank for a stand-alone liquefied gas carrier ships sequentially stacks heat insulating panels 2 on the surface of the cargo tank 1 by facing the opposite edges of each side.

Each of the stacked heat insulating panels 2 is provided with a recessed portion 3 that faces inward from the front surface, and a through hole 4 that penetrates from the center of the bottom surface of the recessed portion 3 to the back surface of the heat insulating panel 2. A bolt 5 protruding from the surface of the cargo tank 1 is passed through the through hole 4, and a washer 6 is fitted to the bolt 5, and then a nut 7 is screwed into the bolt 5, so that the heat insulating panel 2 is attached to the surface of the cargo tank 1. Hold.

As shown in FIG. 9, the end surface of the defluorocarbon foam plug 8 is pressed against the projecting end of the bolt 5 so that the positioning of the holding portion of the heat insulating panel 2 can be easily adjusted. The plug 8 is pushed in to allow the bolt 5 to penetrate the plug 8, and then the washer 6 is fitted to the bolt 5, and then the nut 7 is screwed into the bolt 5.

Then, as shown in FIG. 10, after pushing the defluorocarbon foam upper lug 9 into the recessed portion 3, the upper plug 9 is covered with the plug jacket 10 made of an adhesive sheet.

Further, as shown in FIG. 6, the abutting portions of the respective sides of the heat insulating panel 2 are provided with L-shaped notches 11 on the entire length of the front side corners of the abutting faces, so that both notches 11 The in-situ foamed polyurethane foam 12 for joints is filled in the groove formed by.

As shown in FIG. 7, a flexible heat insulating material 13 such as glass wool or soft urethane foam may be interposed between the abutting surfaces of the heat insulating panel 2 and the side surfaces of the groove.

Then, the in-situ foamed polyurethane foam 12 is covered by the joint cap 14 made of the adhesive tape.

[0009]

[Problems to be solved by the device]

 According to the above configuration, since the joint is formed by the in-situ foaming of the polyurethane foam, there is a problem that the workability is poor and it takes a lot of time and labor.

Further, since the opposite edges of the heat shield panel are butted against each other, the heat expansion of the cargo tank cannot be absorbed, and the heat generated in the heat shield structure, that is, in the heat shield panel is applied to the surface of the cargo tank. The heat insulation is impaired due to the floating of the panel or damage to the heat insulation panel.

In addition, even when a flexible heat insulating material is interposed, there is a problem that the heat expansion cannot be absorbed and the stress generated in the heat insulating panel.

Further, since the diameter of the through hole and the diameter of the bolt are the same, the heat insulating panel cannot be positioned.

Even if the upper plug is used, since the actual plug that is not cylindrical is used, the heat insulating panel cannot be positioned as described above.

Therefore, the problem of the present invention is that the construction can be carried out very easily, the heat insulating panel is not affected by the thermal expansion and contraction of the tank, and the position of the heat insulating panel can be adjusted and adjusted independently. It is an object to provide a heat insulating device for a cargo tank for a tank type liquefied gas carrier.

[0015]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, the present invention provides a heat-insulating panel that is superposed on the entire surface of a cargo tank, and superposed on a notch joint portion having stretchable portions provided on respective opposing edge surfaces, A joint cap that is attached to the surface of this heat-insulating panel and covers the above-mentioned expansion and contraction part, a recessed part that is provided inwardly from the surface of the center part of the heat-insulating panel, and the bottom center of this recessed part from the back surface of the heat-insulating panel. Through the through hole, the bolt protruding from the surface of the cargo tank so as to penetrate the center of the through hole, and the bottom of the hole provided on the end face on the front side against the bolt. A lower plug pressed into the through hole so that the bolt penetrates, a washer fitted to the bolt, a nut screwed into the bolt, and an upper plug packed in the recess. The up Paa to cover the plug is obtained by adopting a configuration consisting of a pasted plug jacket on the surface of the heat insulating panel.

[0016]

[Action]

 Avoid the influence of stress on the heat insulation panel caused by the heat expansion and contraction of the cargo tank and heat insulation panel by using the notch joint with the expansion and contraction section.

Further, the expansion / contraction part is covered with the joint scap, and the upper plug is covered with the plug jacket.

Further, the tip of the mounting bolt of the heat insulating panel to the cargo tank is fitted into the hole of the lower plug, and the leading end of the lower plug is securely fitted into the through hole to guide the lower plug to be pushed.

[0019]

【Example】

 An embodiment of the present invention will be described below with reference to the accompanying drawings.

As shown in FIGS. 1 and 2, on the entire surface of the cargo tank A, there is provided a heat insulating panel 23 in which overlapping phaseless joint portions 22 having stretchable portions 21 provided on respective facing edge surfaces are overlapped. It is installed.

As shown in FIG. 4, the heat insulating panel 23 is attached to the cargo tank A from the center of the surface of the heat insulating panel 23 toward the inside by the recessed portion 24, and from the center of the bottom surface of the recessed portion 24 of the heat insulating panel 23. A through hole 25 is formed on the back surface. First, the end of the bolt 27 is screwed into the female screw stud 26 that is fixed to the front surface of the cargo tank A by welding. Put a heat insulating panel 23 on the surface of the.

Next, the hole 29 provided in the front end surface of the lower CFC-made lower plug 28 is fitted to the tip of the bolt 27, and the front end of the lower plug 28 is fitted into the through hole 25. Then, when the lower plug 28 is pushed in, first, the tip of the bolt 27 comes into contact with the bottom surface of the hole 29, and then the bolt 27 penetrates the lower plug 28.

Then, the washer 30 having a diameter larger than the diameter of the through hole 25 is fitted on the tip of the bolt 27, and then the nut 31 is screwed into the bolt 27 and tightened.

After that, the defluorocarbon foam upper plug 32 is pushed into the recess 24, and then the plug jacket 33 made of a non-combustible adhesive sheet is attached to the surface of the heat insulating panel 23. It is sealed while covering it, and the heat insulating panel 23 is held to the cargo tank A.

The heat insulating panel 23 includes a plate-like body 34 having excellent heat insulating properties such as defluorocarbon foam, and a metal surface treatment (coating film) bonded to the surface of the plate-like body 34 with an adhesive. Formation of the thin plate 35, and the intermittence joint portion 22 is, as shown in FIG. 3, one side of one diagonal of the rectangular heat insulating panel 23, one side of one diagonal, and the other side of the edge of the two sides. Is cut to a depth of 1/2 of the wall thickness, and the other side of one opposite angle wire is cut to the depth of 1/2 of the back surface of the two edges that sandwich one corner. It is provided separately.

Further, as shown in FIGS. 2 and 3, the expansion / contraction portion 21 included in the phase-missing joint portion 22 alternates inward from the surface of the phase-loss joint portion 22 and inward from the back surface thereof, and has a peripheral edge. When a plurality of slits 21 'parallel to each other are formed, and as shown in FIG. 5, a stretchable member 38 such as glass wool having excellent heat insulating property is formed over the entire surface at a right angle to the plate surface of the intermittent joint 22. May be attached in advance via an adhesive, and may be attached to at least one notch joint 22.

The elastic member 38 can be pushed into the gap.

As shown in FIGS. 2 and 5, the stretchable portion 21 is covered with a joint scan 37 made of an incombustible adhesive tape.

As shown in the figure, if the slit 39 is provided inward from the corner of the plate-like body 34, the elasticity of the elastic portions 21 on both sides of the corner will not be impaired.

Further, in the case shown in the figure, the expansion and contraction portions 21 are provided on both the phase notch joint portions 22, respectively, but the expansion and contraction portion 21 may be provided only on one of the phase notch joint portions 22.

[0031]

【effect】

 As described above, according to the heat insulating device for the cargo tank according to the present invention, the influence of the stress of the heat insulating panel generated due to the heat expansion and contraction of the heat insulating panel is avoided by the intermittent joint portion having the expansion and contraction portion, and it is always stable. The heat resistance can be maintained.

When the lower plug is pushed into the through hole, the tip of the bolt is fitted into the hole of the leading end surface of the lower plug, and the leading end of the lower plug is fitted into the through hole first, so the lower plug to be pushed in is inserted. The plug is guided and the lower plug can be pushed in smoothly.

[Brief description of drawings]

FIG. 1 is a front view of an embodiment according to the present invention.

FIG. 2 is an enlarged vertical sectional front view showing the main part of the above.

FIG. 3 is a perspective view of the above.

FIG. 4 is a partially cutaway perspective view showing a supporting portion of a heat insulating panel.

FIG. 5 is a vertical sectional front view of another embodiment in which a heat insulating material is interposed.

FIG. 6 is a vertical sectional front view of a conventional example.

[Figure 7] The same vertical section front view

FIG. 8 is a vertical sectional front view of a heat insulating panel holding portion.

FIG. 9 is a vertical sectional front view of another holding example.

FIG. 10 is a vertical sectional front view in which the upper plug is pushed into the same as above.

[Explanation of symbols]

 A Cargo tank 21 Expansion / contraction part 21 'Slit 22 Interphase joint part 23 Heat insulating panel 24 Recessed part 25 Through hole 26 Female screw stud 27 Bolt 28 Lower plug 29 Hole 30 Washer 31 Nut 32 Upper plug 34 Plate-like body 35 Thin plate 36 Insulation material 37 Joint Scap

Claims (1)

[Scope of utility model registration request] 1. A heat-insulating panel, which is superposed on the entire surface of a cargo tank and superposed on a surface of the heat-insulating panel, which is provided with overlapping notch joints having stretchable portions provided on respective opposing edge surfaces. A joint scap covering the expansion and contraction portion, a recessed portion provided inward from the center surface of the heat insulating panel, and a through hole provided so as to penetrate from the center of the bottom surface of the recessed portion to the back surface of the heat insulating panel. , A bolt protruding from the surface of the cargo tank so as to penetrate through the center of the through hole, and the bottom of the hole provided on the front end face at the tip of the bolt is pressed against the through hole so that the bolt penetrates. The lower plug pushed in, the washer fitted to the bolt, the nut screwed into the bolt, the upper plug packed in the recessed part, and the upper plug to cover it. Heat insulation device for cargo tank for independent tank type liquefied gas carrier consisting of plug jacket attached on the surface of heat insulation panel.