JPH08338597A - Cold-insulation device for support part of inner surface of roof of low temperature tank - Google Patents

Abstract

PURPOSE: To provide a device for cold-insulating a support part for the inner surface of the roof of a low temperature tank, with which cold and heat can hardly be transmitted from the support part for the inner surface of the roof of the low temperature tank, from which a member to be slung such as a rail or a stage is slung, to the interior of the tank. CONSTITUTION: An inner pipe cover 17 for cold-insulating a pipe line, is fitted on the outer periphery of a support pipe 5, the inner pipe cover 17 having a length which is substantially equal to the total thickness of upper and lower layer cold insulating members 4a, 4b, and an outer pipe cover 18 for cold- insulating the pipe line is fitted on the upper part of the outer periphery of the inner pipe cover 17, the outer pipe cover 18 having a length substantially equal to the thickness of the upper layer cold insulating member 4a. Further, the inner diameter of a through-hole 7a formed in the upper layer cold insulating member 4a is set to be larger than the outer diameter of the outer pipe cover 18 by a predetermined value, and the inner diameter of a through-hole 7b formed in the lower layer cold insulating member 4b is set to be larger than the outer diameter of the inner pipe cover 7 by a predetermined value.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling device for a roof inner surface support part of a low temperature tank that cools a portion of a support pipe for suspending a suspended member on an inner surface of a roof of a low temperature tank for storing LNG or the like. is there.

[0002]

2. Description of the Related Art Generally, a suspended member such as a rail or a stage for running a gondola for maintenance is suspended on the inner surface of the roof of a low temperature tank for storing LNG or the like.

An example of a cooler for the roof inner surface support portion of a low temperature tank which has been conventionally used for suspending such a suspended member will be described with reference to FIG. , A beam member 3 for reinforcement provided on the inner surface side of the roof plate 2, and a plurality of layers (two layers in the example of the figure) made of rigid polyurethane foam or the like on the inner surface side of the roof 1. Cooling material 4a, 4b
Is provided.

An upper end 6 of a support pipe 5 is fixed to the inner surface of the beam member 3 constituting the roof 1 by welding or the like, and the support pipe 5 has through holes 7a and 7b formed in the cold insulators 4a and 4b. To extend below the cold insulating materials 4a and 4b.

A bracket 9 is fixed to the lower end 8 of the support pipe 5 by welding or the like, and a suspended member 10 such as a rail or a stage for traveling a gondola for maintenance or the like is suspended through the bracket 9. It has become.

In the gap 11 formed between the inner circumference of the through holes 7a, 7b formed in the cold insulators 4a, 4b for inserting the support pipe 5 and the outer circumference of the support pipe 5, a heat insulating material such as glass wool is provided. 12 is filled so that cold heat inside the low temperature tank is not transmitted to the roof 1 through the gap 11.

[0007]

However, in the conventional cooler for supporting the inner surface of the roof of the low temperature tank as described above, since the through holes 7a and 7b have a constant diameter and extend straight in the vertical direction, the through holes are not provided. The gap 11 formed between the inner circumference of 7a, 7b and the outer circumference of the support pipe 5 also has a shape that extends straight in the vertical direction, and even if the heat insulating material 12 such as glass wool is filled, the cold heat inside the low temperature tank is not straight. It was easy to escape upward through the gap 11, which was a factor of lowering the cold insulation performance of the low temperature tank.

Since the support pipe 5 has a relatively small outer diameter and may be inclined with respect to the cold insulating materials 4a and 4b, it penetrates the cold insulating materials 4a and 4b so as to fit the support pipe 5. It is not easy to form the holes 7a and 7b, and there is a drawback that the construction is difficult.

In view of the above situation, the present invention makes it possible to prevent the cold heat inside the low temperature tank from escaping from the roof inner surface support part of the low temperature tank for suspending the suspended members such as rails and stages, and the construction is also easy to perform. It is an object of the present invention to provide a cooler for the inner support portion of the roof of a low temperature tank.

[0010]

SUMMARY OF THE INVENTION According to the present invention, a support pipe for suspending a member to be suspended is fixed to an inner surface of a roof, and a plurality of layers of cold insulation material in which the support pipe is inserted into a through hole. Is a roof inner surface support portion cold insulation device of a low temperature tank arranged on the inner surface side of the roof, the outer periphery of the support pipe, while fitting a plurality of pipe covers of different outer diameter for pipe cold insulation, The inner diameter of the through hole of the cold insulating material in each layer is increased by a required amount so as to correspond to the outer diameter of each pipe cover, and the center of the support pipe in the gap formed between each pipe cover and each through hole The present invention relates to a cooling device for a roof inner surface support part of a low temperature tank, characterized in that the distance from the axis is changed for each layer of the cooling material.

In the cold insulator for the roof inner surface support portion of the low temperature tank, an inner pipe cover having a length substantially equal to the total thickness of the upper and lower cold insulators is fitted around the outer circumference of the support pipe, and the inner pipe cover An outer pipe cover having a length substantially equal to the thickness of the upper layer cold insulating material is fitted to the outer peripheral upper part, and the inner diameter of the through hole of the upper layer cold insulating material is made larger than the outer diameter of the outer pipe cover by a required amount. The inner diameter of the through-hole of the lower layer cold insulator can be made larger than the outer diameter of the inner pipe cover by a required amount.

An upper pipe cover having a length substantially equal to the thickness of the upper layer cold insulating material is fitted on the upper peripheral portion of the support pipe, and a thickness of the lower layer cold insulating material is approximately equal to the lower peripheral portion of the support pipe. Fitting a lower pipe cover having a length and a larger outer diameter than the upper pipe cover,
The inner diameter of the through hole of the upper layer cold insulator is larger than the outer diameter of the upper pipe cover by a required amount, and the inner diameter of the through hole of the lower layer cold insulator is larger than the outer diameter of the lower pipe cover by the required amount. You can also

[0013]

The gap formed between the inner periphery of the through hole formed in the cold insulating material and the outer periphery of the pipe cover has a curved shape that does not extend straight in the vertical direction. It will be difficult to escape and the cold storage performance of the low temperature tank will be improved.

Further, regarding the construction, it suffices to fit the pipe cover on the outer periphery of the support pipe and make the through hole of the cold insulating material have a diameter corresponding to the outer diameter of the pipe cover.

[0015]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows an embodiment of the present invention.
The parts denoted by the same reference numerals as in FIG. 3 represent the same parts, and the upper and lower layers of the cold insulating material 4a,
An inner pipe cover 17 for keeping the pipe cold, which has a length substantially equal to the total thickness of the inner pipe cover 4b, is fitted with an adhesive or the like, and is approximately equal to the thickness of the upper layer cold insulator 4a at the upper peripheral portion of the inner pipe cover 17. Outer pipe cover 1 for keeping the pipe cold
8 is fitted with an adhesive or the like, the inner diameter of the through hole 7a of the upper layer cold insulating material 4a is made larger than the outer diameter of the outer pipe cover 18 by a required amount, and the through hole 7b of the lower layer cold insulating material 4b is formed. The inner diameter is made larger than the outer diameter of the inner pipe cover 17 by a required amount, and cylindrical gaps 19 and 20 formed between the pipe covers 17 and 18 and the through holes 7a and 7b are formed.
The distance from the central axis of the support pipe 5 is changed for each cold insulating material 4a, 4b of each layer.

A cylindrical gap 19 is formed between the inner circumference of the through hole 7a and the outer circumference of the outer pipe cover 18.
And a cylindrical gap 20 formed between the inner circumference of the through hole 7b and the lower outer circumference of the inner pipe cover 17, and a flat surface formed between the lower surface of the outer pipe cover 18 and the upper surface of the cold insulating material 4b. The ring-shaped gap 21 is filled with a heat insulating material 12 such as glass wool.

With the above-described structure, the cold heat inside the cryogenic tank passes through the small-diameter cylindrical gap 20 through the flat ring-shaped gap 21 and further through the large-diameter cylindrical gap 19 to reach the roof 1. Since it escapes, the path through which the cold heat escapes becomes a refracted path, making it difficult for the cold heat to pass through and improving the cold insulation performance of the low temperature tank.

As for construction, the support pipe 5
The inner pipe cover 17 and the outer pipe cover 18 are fitted around the outer periphery of the cold insulating material 4a so that the through holes 7a of the cold insulating material 4a have a diameter corresponding to the outer diameter of the outer pipe cover 18 and
It is only necessary to make the through hole 7b of b the diameter corresponding to the outer diameter of the inner pipe cover 17.

Thus, the cold heat inside the low temperature tank can be prevented from escaping easily from the roof inner surface support portion of the low temperature tank for suspending the suspended member 10 such as the rail or stage, and the construction can be facilitated.

FIG. 2 shows another embodiment of the present invention. In the figure, the parts denoted by the same reference numerals as those in FIG. 1 represent the same parts, and the upper layer of the heat insulating material is provided on the upper periphery of the support pipe 5. Four
An upper pipe cover 22 for keeping the pipe cold, which has a length substantially equal to the thickness of a, is fitted with an adhesive or the like, and a length substantially equal to the thickness of the lower cold insulating material 4b is provided on the lower peripheral portion of the support pipe 5. And a lower pipe cover 23 for keeping the pipe cold, which has a larger outer diameter than the upper pipe cover 22, is fitted by using an adhesive or the like, and the inner diameter of the through hole 7a of the upper cold insulating material 4a is set to the upper pipe cover. 22 is larger than the outer diameter of 22 by a required amount, and the inner diameter of the through hole 7b of the lower layer cold insulating material 4b is larger than the outer diameter of the lower pipe cover 23 by a required amount. Through holes 7a, 7b
The distance between the center axis of the support pipe 5 and the cylindrical gaps 19 and 20 formed between
It is changed every b.

In the embodiment shown in FIG. 2, the cold heat inside the cryogenic tank passes through the large-diameter cylindrical gap 20 through the flat ring-shaped gap 21 and further through the small-diameter cylindrical gap 19 to the roof. Because I will escape to 1,
The path through which the cold heat escapes becomes a refracted path, making it difficult for the cold heat to pass through and improving the cold insulation performance of the low temperature tank.

As for construction, the support pipe 5
The upper pipe cover 22 and the lower pipe cover 23 are fitted to the outer periphery of the cold insulating material 4a so that the through holes 7a of the cold insulating material 4a have a diameter corresponding to the outer diameter of the upper pipe cover 22.
It suffices that the through hole 7b of b has a diameter corresponding to the outer diameter of the lower pipe cover 23.

Thus, even in the case of the embodiment shown in FIG.
It is possible to make it difficult for the cold heat inside the low temperature tank to escape from the roof inner surface support portion of the low temperature tank that suspends the suspended member 10 such as a rail or stage, and to facilitate construction.

The cooling device for the roof inner surface support portion of the cryogenic tank of the present invention is not limited to the above-mentioned embodiment, and various modifications can be made without departing from the scope of the present invention. Is.

[0026]

As described above, according to the cooling device for the support portion of the inner surface of the low temperature tank of the present invention, the pipe cover is closely attached to the support pipe for suspending the suspended member on the inner surface of the roof of the low temperature tank. At the same time, the gap formed between the cold insulator attached to the inner surface side of the roof and the periphery of the pipe cover has a bent shape without extending straight, so that the cold heat inside the low temperature tank is difficult to escape upward,
The cold insulation performance of the low temperature tank can be improved, and the pipe cover is fitted on the outer circumference of the support pipe, and the through hole of the cold insulation material is simply made to have a diameter corresponding to the outer diameter of the pipe cover. The excellent effect that it can be performed easily can be exhibited.

[Brief description of drawings]

FIG. 1 is a side sectional view of an embodiment of the present invention.

FIG. 2 is a side sectional view of another embodiment of the present invention.

FIG. 3 is a side sectional view of a conventional example.

[Explanation of symbols]

 1 Roof 4a Cooling material 4b Cooling material 5 Support pipe 7a Through hole 7b Through hole 10 Suspended member 17 Inner pipe cover (pipe cover) 18 Outer pipe cover (pipe cover) 19 Gap 20 Gap 22 Upper pipe cover (pipe cover) 23 Lower pipe cover (pipe cover)

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kiyoshi Naito 3-2-16 Toyosu, Koto-ku, Tokyo Ishikawajima Harima Heavy Industries Ltd. Toyosu General Office (72) Inventor Seiji Horiguchi 3--2 Toyosu, Koto-ku, Tokyo No. 16 Ishikawajima Harima Heavy Industries Co., Ltd.Toyosu General Office

Claims (3)

[Claims] 1. A support pipe for suspending a suspended member is fixed to an inner surface of a roof, and a plurality of layers of cold insulation material through which the support pipe is inserted through a through hole are arranged on the inner surface of the roof. A low temperature tank roof inner surface support unit cold insulation device that is provided, the outer periphery of the support pipe, while fitting a plurality of pipe covers with different outer diameter for cold insulation of the pipe, the through hole of the cold insulation material in each layer The inner diameter is increased by a required amount so as to correspond to the outer diameter of each pipe cover, and the distance from the center axis of the support pipe of the gap formed between each pipe cover and each through hole is set to Cooling device for the roof inner surface support part of the low temperature tank, which is characterized by changing for each cold insulating material. 2. An inner pipe cover having a length substantially equal to the total thickness of the upper and lower layers of the heat insulating material is fitted on the outer circumference of the support pipe, and the thickness of the upper layer of the heat insulating material is provided on the outer peripheral upper portion of the inner pipe cover. An outer pipe cover having a substantially equal length is fitted, the inner diameter of the through hole of the upper layer cold insulating material is made larger than the outer diameter of the outer pipe cover by a required amount, and the inner diameter of the through hole of the lower layer cold insulating material is set to the above. The cold insulation device for the roof inner surface support portion of the low temperature tank according to claim 1, wherein the diameter is larger than the outer diameter of the inner pipe cover by a required amount. 3. An upper pipe cover having a length substantially equal to the thickness of the upper layer cold insulating material is fitted to the upper outer peripheral portion of the support pipe, and a thickness of the lower layer cold insulating material is approximately equal to the lower peripheral portion of the support pipe. A lower pipe cover having a length and a larger outer diameter than the upper pipe cover is fitted, and the inner diameter of the through hole of the upper layer cold insulating material is made larger than the outer diameter of the upper pipe cover by a required amount, and the lower layer The cold-insulating device for the roof inner surface support portion of the low temperature tank according to claim 1, wherein the through hole of the cold insulating material has an inner diameter larger than the outer diameter of the lower pipe cover by a required amount.