JPH059349Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a heat insulating material support structure capable of preventing damage to the heat insulating material.

[Prior Art] Fig. 3 shows an example of a conventional heat insulating material support structure, in which plywood b is pasted on the tank wall surface c side of the heat insulating material a, and the four corners of the plywood b are made to protrude from the tank wall surface c. It is fixed to the stud d using a washer e and a nut f.

Fig. 4 shows another example of a conventional heat insulating material support structure, in which a heat insulating material g having the same elasticity as the tank wall c is arranged on the tank wall c side, and a heat insulating material is placed on the outside of the heat insulating material g. A double structure is adopted in which a better heat insulating material g' is disposed, and the middle of the heat insulating materials g and g' is fixed by a stopper h protruding from the tank wall surface c.

However, in the case of the above-mentioned conventional structure, in the former case, the four corners of the heat insulating material a are fixed, so the expansion and contraction of the heat insulating material a in response to the low-temperature change of the tank wall c is inhibited. Since plywood b is attached to heat insulating material a, the materials and manufacturing man-hours are bulky, resulting in high costs, and in the case of the latter, the panel structure of heat insulating materials g and g' becomes complicated, resulting in high costs. It was hot.

Therefore, in order to solve the above-mentioned problems, it is desirable to fix the heat insulating material at one point in the center on a stud protruding from the wall of the tank so that it can expand and contract.

[Problems to be solved by the invention] However, when the heat insulating material is fixed to the stud at one point in the center, the inner periphery of the hole provided in the heat insulating material comes into direct contact with the outer periphery of the stud, which has a small pressure-receiving area, and the heat insulating material There is a risk that damage such as dents may occur at the stud abutting portion on the inner periphery of the material hole.

The present invention was developed in view of the above-mentioned circumstances with the aim of preventing damage to the heat insulating material, making it expandable and contractible, and simplifying the structure.

[Means for Solving the Problems] In the present invention, a heat-insulating protective material having a mounting hole is fitted on the tank wall side in the approximate center of the heat-insulating material, and the heat-insulating protective material is attached to the heat-insulating material. A through hole that communicates with the mounting hole and has a larger diameter than the mounting hole is drilled, and the heat insulating material is installed in a hole that protrudes from the tank wall and has a diameter of the through hole insertion portion smaller than that of the mounting hole insertion portion. Mount it on the mounting rod through the mounting hole of the heat insulating material and the through hole of the heat insulating material, and fill the gap between the rod body of the mounting rod and the through hole provided in the heat insulating material with the stud part of the mounting rod. and the rod hole of the heat-insulating protective material fitted into the heat-insulating material, and a nut for holding the heat-insulating material through a washer at the tip of the mounting rod on the side opposite to the tank wall side. It has a structure in which the two are screwed together.

[Function] In the present invention, the diameter of the through hole in the heat insulating material is made larger than the diameter of the mounting hole in the heat insulating protection material, and the diameter of the through hole insertion part of the mounting rod is made smaller than the diameter of the mounting insertion part. Even if a load is applied to the heat insulating material in a direction perpendicular to the mounting rod, the mounting rod will not come into direct contact with the through holes in the heat insulating material, thus preventing damage to the through holes in the heat insulating material. The material is mounted on the mounting rod through the mounting hole of the heat-insulating protection material installed in the center and the through-hole of the heat-insulating material, and is fixed to the mounting rod by screwing a nut to the mounting rod, so it does not expand or contract. The number of parts is small and the structure is simple, so the cost is low.

[Example] Hereinafter, an example of the present invention will be described based on the accompanying drawings.

FIG. 1 and FIG. 2 are an embodiment of the present invention, and show an example of a heat shield support structure for a cryogenic tank of an LNG carrier. A circumferential groove 2 of a required size is bored approximately in the center of the heat insulating material 1, a heat insulating protection material 3 made of plywood, for example, is fitted into the circumferential groove 2, and a mounting rod hole 4 is inserted into the heat insulating material 3. A through hole 7 having an inner diameter larger than the rod hole 4 is bored in the heat insulating material 1 so as to communicate with the rod hole 4 and to form a sufficient gap 6 between the rod hole 4 and the attachment rod 5. so that the heat insulating protection material 3 side of the heat insulating material 1 can come into contact with the tank wall surface 8,
It is mounted on a mounting rod 5 bored in a tank wall 8, and a met 10 is screwed onto the mounting rod 5 via a washer 9. The attachment rod 5 consists of a stud portion 5a and a rod body portion 5b having a smaller diameter than the stud portion 5a, and the stud portion 5a is located in the rod hole 4 of the protective member 3.

Since the heat insulating material support structure is adopted as described above, the heat insulating material 1 is supported at one point in the center.
Like the heat-insulating structure of an LNG carrier, it can expand and contract freely even when cooled to -162℃ without any problems.

Even if a load is applied to the heat insulating material 1 in a direction perpendicular to the mounting rod 5 due to its own weight or other external force, and the stud portion 5a of the mounting rod 5 comes into contact with the inner circumference of the rod hole 4 of the heat insulating protective material 3, the heat insulating material 1 does not come into direct contact with the rod body portion 5a of the mounting rod 5 due to the heat insulating protective material 3 and the gap 6, and therefore no dent damage is caused to the heat insulating material 1. To explain this in more detail, if the heat insulating material 1 comes into direct contact with the mounting rod 5, the area (pressure receiving area) of the mounting rod 5 that receives the above-mentioned load is small, and therefore dent damage is caused to the heat insulating material 1. However, in this device, the heat insulating protective material 3, which has sufficient strength and can have a large pressure receiving area, is attached to the heat insulating material 1, so the pressure per unit area generated in the heat insulating material 1 at the contact portion of the heat insulating protective material 3 due to the load is small, and therefore no dent damage is caused to the heat insulating material 1. In addition, the through hole 7 of the heat insulation material 1 is made larger than the outer diameter of the mounting rod 5, and a sufficient gap 6 is provided between the heat insulation material 1 and the mounting rod 5, so that the mounting rod 5 does not abut against the inner periphery of the through hole 7 of the heat insulation material 1 in this portion, and therefore no dent damage is caused to the heat insulation material 1.

Furthermore, the heat insulating material 1 is attached to the tank wall surface 8 using the rod 5.
If the heat insulating material 1 is not attached to the mounting rod 5, the area around the mounting rod hole of the heat insulating material 1 may be damaged. Since it is attached to the heat insulating material 1, the area around the mounting rod hole 4 will not be damaged.

In addition, in the embodiment of this invention, the case of a low-temperature tank of an LNG carrier was explained, but it is also possible to apply it to the heat-insulating structure of a low-temperature tank for LPG, liquefied ethylene, etc. It goes without saying that various changes may be made without departing from the gist of the present invention.

[Effects of the Invention] Since the heat insulating material support structure of the present invention has the above-described configuration, it can exhibit various excellent effects as described below.

() Support the heat insulating material by interposing a heat insulating material with a large pressure-receiving area between the heat insulating material and the mounting rod, and make the diameter of the through hole in the heat insulating material larger than the diameter of the mounting hole in the heat insulating material. Since the diameter of the through-hole insertion part of the rod is smaller than the diameter of the mounting hole insertion part, the mounting rod and the heat insulating material do not come into direct contact with each other, thereby preventing damage to the heat insulating material.

() The heat insulating material is mounted on the mounting rod through the mounting holes and through holes in the heat insulating protection material, and is fixed to the tank wall by simply screwing nuts onto the mounting rod, so it can expand and contract freely. It can be carried out.

() The cost is low because the number of parts is small and the structure is simple.

[Brief explanation of the drawing]

FIGS. 1 and 2 are explanatory diagrams of an embodiment of the heat insulating material support structure of the present invention, and FIGS. 3 and 4 are
FIG. 2 is an explanatory diagram of a conventional heat shield support structure. 1 is a heat insulating material, 2 is a circumferential groove, 3 is a heat insulating protective material, 4 is a hole for a mounting rod, 5 is a mounting rod, 6 is a gap, 7
8 indicates a through hole, 8 indicates a tank wall, 9 indicates a washer, and 10 indicates a nut.

Claims (1)

[Scope of utility model registration request] A heat-insulating protective material having a mounting hole is fitted on the tank wall side in the approximate center of the heat-insulating material, and the heat-insulating material is in communication with the mounting hole of the heat-insulating material and has a diameter larger than the mounting hole. A through hole is drilled, and the heat insulating material is attached to a mounting rod that protrudes from the tank wall and has a diameter of the through hole insertion part smaller than that of the mounting hole insertion part. The rod body of the mounting rod and the through hole provided in the heat insulating material are installed through the through hole of the mounting rod, and the gap between the rod body of the mounting rod and the through hole provided in the heat insulating material is connected to the stud of the mounting rod and the heat insulating protection material fitted in the heat insulating material. A heat insulating material support, characterized in that the distance between the mounting rod and the hole is larger than that of the heat insulating material support, and a nut for holding down the heat insulating material is screwed onto the end of the mounting rod on the opposite side from the tank wall side through a washer. structure.